{ "$schema_version": "5.3", "review_mode": "fresh", "claim_restatement": { "index_wording": "Aerobic training below the first measured lactate or ventilatory threshold increases cardiorespiratory fitness in adults.", "entry_form": "claim", "gradeable_restatement": "Aerobic training below the measured first lactate/ventilatory threshold increases cardiorespiratory fitness in adults.", "restatement_required": true, "split_into": [], "parent_claim": null, "scope_qualifiers": [ { "qualifier": "Adult age, baseline fitness, disease, objectively determined first threshold, assigned training intensity, comparator and 6-24 week follow-up established before outcomes", "determinable_before_outcome": true, "determined_from": "Enrollment and experimental design, before results; no responder-defined scope.", "action": "retained" } ], "original_claim": "Aerobic training below the first measured lactate or ventilatory threshold increases cardiorespiratory fitness in adults.", "restatement_note": "This grammatical restatement preserves the original LT1 and VT1 operational measurement alternatives. The slash does not require both methods simultaneously, assert perfect interchangeability, broaden exposure to another threshold, or change the registered clinical claim. Exact measurement algorithms remain source-specific." }, "hypothesis": { "name": "Zone 2 Training and Cardiorespiratory Fitness", "central_claim": "Aerobic training below the measured first lactate/ventilatory threshold increases cardiorespiratory fitness in adults.", "proposed_mechanism": "Aerobic training below the first measured lactate or ventilatory threshold increases cardiorespiratory fitness in adults.", "claimed_scope": "Adults with baseline fitness and clinical status measured, 6-24 weeks of aerobic training below the first measured lactate or ventilatory threshold, with laboratory VO2peak or VO2max against no added training", "claimed_level": [ "response", "maintenance" ], "is_conjunctive": false, "conjunctive_note": "The declared clinical causal proposition is represented by SC2. Target engagement, superiority, mechanism, generalization and benefit-harm companions are separately reported and do not substitute for this primary claim." }, "rubric_routing": { "primary_rubric": "06-metabolism-aging.md", "secondary_rubrics": [], "index_notes_applied": [ "The declared clinical causal proposition is represented by SC2. Target engagement, superiority, mechanism, generalization and benefit-harm companions are separately reported and do not substitute for this primary claim." ], "rubric_fit_note": "Frozen rubric06 addresses metabolic aging rather than clinical exercise prescription. Its lifespan-specific wording is quoted unchanged and the registered clinical adaptation is explicit: controlled aerobic training with measured cardiorespiratory capacity is the phenotype-relevant intervention, not a demonstration of lifespan extension. Cardiorespiratory capacity is the registered functional physiological outcome. Isolated mitochondrial, fat-oxidation, proteomic or wearable-score changes remain proxies for other claimed benefits. The human-only trial evidence is not capped because it uses one species; the single-species rule binds animal-to-human generalization, not directly tested human clinical scope." }, "subclaim_matrix": { "subclaims": [ { "id": "SC1", "statement": "Training below the first measured lactate or ventilatory threshold changes oxidative metabolic capacity.", "subclaim_type": "mechanism", "scope": "Adults; measured LT1 or VT1 used rather than an arbitrary wearable zone", "claimed_scope": "Adults; measured LT1 or VT1 used rather than an arbitrary wearable zone", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Muscle and cardiopulmonary measurements", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Aerobic training changes muscle, cardiac and molecular physiology, but the selected oxidative and transcriptomic experiments do not isolate an exclusive below-first-threshold stimulus as the mediator of functional adaptation. Muscle-only or blood-cell biomarkers retain the universal Γ ceiling for downstream functional inference.", "rubric_adaptation": "Muscle and cardiopulmonary oxidative measurements are assessed as potential mechanisms. They do not substitute for the functional measured-VO2 phenotype or mortality endpoint; biomarker-only inference retains Γ." }, { "id": "SC2", "statement": "Training below LT1 or VT1 increases measured cardiorespiratory fitness against no added training.", "subclaim_type": "sufficiency", "scope": "Adults with baseline fitness and clinical status measured; 6-24 weeks; laboratory VO2peak or VO2max", "claimed_scope": "Adults with baseline fitness and clinical status measured; 6-24 weeks; laboratory VO2peak or VO2max", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Controlled aerobic-training comparisons", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Belman and Gaesser (PMID2072834) report a genuine measured-VO2max gain during eight-week training approximately 72% of their measured lactate threshold. The accessible abstract does not identify the first threshold or its algorithm, and control allocation is incompletely accessible. It therefore cannot verify the exact registered below-LT1 exposure. The modern randomized moderate-domain experiment (PMID38376995) is null against control. This supports mechanistic plausibility and a positive adjacent exposure, but no verified positive same-scope crossing or causal boundary for the registered claim.", "rubric_adaptation": "For this explicitly registered clinical exercise proposition, the field-valid equivalent is controlled training versus no added training with objectively measured VO2max or VO2peak, valid first-threshold exposure and baseline-defined eligibility. This clinical adaptation does not claim lifespan extension and does not replace the quoted frozen criterion." }, { "id": "SC3", "statement": "Training below LT1 or VT1 is superior to higher-intensity training for cardiorespiratory fitness at matched exercise volume.", "subclaim_type": "primacy", "scope": "Baseline-defined adults; direct volume-matched comparison; 6-24 weeks", "claimed_scope": "Baseline-defined adults; direct volume-matched comparison; 6-24 weeks", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Randomized intensity comparisons", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "No examined direct volume-matched comparison establishes exclusive below-LT1 training as superior for laboratory VO2max. Gormley's volume-controlled trial (PMID18580415) favoured higher intensity under percentage-reserve prescriptions. Polarized successes contain substantial intervals, and volume-matched cancer-survivor training (PMID40198065) showed no between-arm benefit. These are informative challenges but not proof of universal inferiority of every below-LT1 prescription.", "rubric_adaptation": "The relevant clinical perturbation must directly compare exclusive below-first-threshold training with higher intensity at matched total exercise volume, with measured VO2max and a positive between-arm superiority result. Equal duration, mixed polarized exposure and within-arm gains do not qualify." }, { "id": "SC4", "statement": "An intervention-induced increase in VO2max itself mediates reduced mortality.", "subclaim_type": "mechanism", "scope": "Adults; measured fitness before hard clinical outcomes; not wearable estimates", "claimed_scope": "Adults; measured fitness before hard clinical outcomes; not wearable estimates", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Mediator dissociation and independent causal instruments", "hsef_level": "Β", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Higher measured or estimated fitness reproducibly predicts survival, but no examined experiment isolates an intervention-induced VO2max gain as the mortality mediator. Genetics offers complementary causal tests for related disease outcomes, while the direct longevity MR (PMID38864459) was null. Pure mortality associations cannot cross Β, and the null genetic test does not provide a positive threshold crossing.", "rubric_adaptation": "The claimed phenotype is mortality, not fitness or a different incident disease. Mediation requires a design separating VO2max change from simultaneous activity, adiposity, illness, adherence and other training effects; a valid genetic instrument must address those alternative paths." } ], "aggregation_rule": "primary-subclaim", "aggregation_preregistered": true, "aggregation_rationale": "The declared clinical causal proposition is represented by SC2. Target engagement, superiority, mechanism, generalization and benefit-harm companions are separately reported and do not substitute for this primary claim.", "primary_subclaim_id": "SC2", "aggregation_derivation": "The registered primary-subclaim rule returns Γ from SC2. General aerobic training can improve fitness and the older study has a real positive result. However, its study-defined lactate threshold cannot yet be equated with the registered first threshold. The modern six-week randomized moderate-domain comparison is null. An unverified positive exposure and a verified null cannot establish context-specific causality. The63 originals include intensity comparators, shared-cohort physiology, prognosis and descriptive device validation; they are not63 exclusive below-LT1 trials. Weakest-link returns Β; primary-subclaim and scope-matched return Γ.", "aggregation_alternatives": { "weakest_link_would_return": "Β", "primary_subclaim_would_return": "Γ", "scope_matched_would_return": "Γ", "note": "Separate narrow successes do not replace the preregistered full-scope gate." }, "index_rule_deviation": "" }, "competing_models": { "models_evaluated": [ { "rank_in_tournament": 1, "model_id": "M2", "is_nominal": false, "name": "Training dose and realized exposure govern adaptation", "core_claim": "Aerobic-training dose and adherence, interacting with baseline clinical status, cause fitness gains without requiring an exclusive zone mechanism.", "explains_what_nominal_does_not": "Aerobic-training dose and adherence, interacting with baseline clinical status, cause fitness gains without requiring an exclusive zone mechanism.", "strongest_supporting_evidence": [ "Dose-related DREW observations (PMID19204597), broad moderate-training control contrasts (PMID1727835), HERITAGE intensity analysis (PMID11719894), and individualized bundled training (PMID31200443) favour a flexible dose model." ], "strongest_contradictory_evidence": [ "The older HFrEF attention-controlled null (PMID20121952) shows prescribed training does not guarantee gains; this model cannot erase nonresponse or claim no intensity effect." ], "hsef_level_for_this_model": "Ε", "rationale": "Dose-related DREW observations (PMID19204597), broad moderate-training control contrasts (PMID1727835), HERITAGE intensity analysis (PMID11719894), and individualized bundled training (PMID31200443) favour a flexible dose model. The older HFrEF attention-controlled null (PMID20121952) shows prescribed training does not guarantee gains; this model cannot erase nonresponse or claim no intensity effect." }, { "rank_in_tournament": 2, "model_id": "M3", "is_nominal": false, "name": "Higher-intensity intervals can increase fitness more efficiently", "core_claim": "Higher-intensity training produces equal or greater cardiorespiratory adaptation in several baseline-defined groups, with tolerability and adherence constraints.", "explains_what_nominal_does_not": "Higher-intensity training produces equal or greater cardiorespiratory adaptation in several baseline-defined groups, with tolerability and adherence constraints.", "strongest_supporting_evidence": [ "Volume-controlled Gormley (PMID18580415) and isocaloric hypertensive training (PMID21450580) favour higher intensity for measured VO2max; added moderate work in trained cyclists (PMID42560532) showed no detected incremental gain." ], "strongest_contradictory_evidence": [ "Other direct comparisons show no significant difference (PMID31584766,40198065), so neither universal superiority nor equivalence is established." ], "hsef_level_for_this_model": "Ε", "rationale": "Volume-controlled Gormley (PMID18580415) and isocaloric hypertensive training (PMID21450580) favour higher intensity for measured VO2max; added moderate work in trained cyclists (PMID42560532) showed no detected incremental gain. Other direct comparisons show no significant difference (PMID31584766,40198065), so neither universal superiority nor equivalence is established." }, { "rank_in_tournament": 3, "model_id": "M1", "is_nominal": true, "name": "Below-first-threshold aerobic training increases fitness", "core_claim": "Exclusive aerobic training below the first measured threshold can increase measured cardiorespiratory capacity against no added training.", "explains_what_nominal_does_not": "Exclusive aerobic training below the first measured threshold can increase measured cardiorespiratory capacity against no added training.", "strongest_supporting_evidence": [ "The older controlled comparison (PMID2072834) reports a genuine positive fitness result below its study-defined lactate threshold, but that threshold is not verified as LT1." ], "strongest_contradictory_evidence": [ "The modern six-week moderate-domain randomized result (PMID38376995) is null; the historical exposure ambiguity prevents interpreting this pair as a verified causal context boundary." ], "hsef_level_for_this_model": "Γ", "rationale": "The older controlled comparison (PMID2072834) reports a genuine positive fitness result below its study-defined lactate threshold, but that threshold is not verified as LT1. The modern six-week moderate-domain randomized result (PMID38376995) is null; the historical exposure ambiguity prevents interpreting this pair as a verified causal context boundary." }, { "rank_in_tournament": 4, "model_id": "M4", "is_nominal": false, "name": "Fitness predicts survival without established isolated mediation", "core_claim": "Cardiorespiratory fitness is a prognostic indicator containing illness, body composition and behavioural information, while intervention-induced fitness itself has not been isolated as the mortality mediator.", "explains_what_nominal_does_not": "Cardiorespiratory fitness is a prognostic indicator containing illness, body composition and behavioural information, while intervention-induced fitness itself has not been isolated as the mortality mediator.", "strongest_supporting_evidence": [ "Directly measured fitness predicts mortality (PMID33966081), rehabilitation change predicts survival (PMID29701805), and longevity MR was null (PMID38864459)." ], "strongest_contradictory_evidence": [ "MR support for diabetes and selected incident diseases (PMID37400433,42156172) argues against treating fitness as a wholly inert marker; these studies do not establish the registered mortality-mediation claim." ], "hsef_level_for_this_model": "Β", "rationale": "Directly measured fitness predicts mortality (PMID33966081), rehabilitation change predicts survival (PMID29701805), and longevity MR was null (PMID38864459). MR support for diabetes and selected incident diseases (PMID37400433,42156172) argues against treating fitness as a wholly inert marker; these studies do not establish the registered mortality-mediation claim." } ], "tournament_summary": "Descriptive comparison; does not modify the nominal score. Gormley's randomized volume-controlled comparison (PMID18580415) separates generic training-dose benefit from the additional impact of intensity: higher intensities produced greater measured VO2max gains at controlled volume. Both models remain compatible with low-intensity benefit; the comparison uses relative reserve rather than measured LT1.", "study_separating_rank1_from_rank2": "Gormley's randomized volume-controlled comparison (PMID18580415) separates generic training-dose benefit from the additional impact of intensity: higher intensities produced greater measured VO2max gains at controlled volume. Both models remain compatible with low-intensity benefit; the comparison uses relative reserve rather than measured LT1.", "nominal_wins_only_by_funding_artifact": false, "level_unchanged_by_tournament": true }, "evidence_inventory": [ { "n": 1, "pmid": "1727835", "title": "Low to moderate intensity endurance training in healthy older adults: physiological responses after four months.", "citation": "Posner JD, Gorman KM, Windsor-Landsberg L et al. Low to moderate intensity endurance training in healthy older adults: physiological responses after four months. Journal of the American Geriatrics Society. 1992.", "doi": "10.1111/j.1532-5415.1992.tb01820.x", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/1727835/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/1727835/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID1727835", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "In 247 healthy older adults randomized to 16 weeks of cycling or attention control, training increased measured VO2max by 8.5% versus a slight control decline.", "what_it_does_not_show": "Prescription was 70% peak heart rate rather than individual LT1 or VT1; supports conventional moderate aerobic training, not verified below-threshold training or mortality mediation.", "confounders_present": [ "Prescription was 70% peak heart rate rather than individual LT1 or VT1; supports conventional moderate aerobic training, not verified below-threshold training or mortality mediation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 2, "pmid": "36281113", "title": "Effectiveness of hospital-based low intensity and inspected aerobic training on functionality and cardiorespiratory fitness in unconditioned stroke patients: Importance of submaximal aerobic fitness markers.", "citation": "Horváth J, Debreceni Nagy A, Fülöp P et al. Effectiveness of hospital-based low intensity and inspected aerobic training on functionality and cardiorespiratory fitness in unconditioned stroke patients: Importance of submaximal aerobic fitness markers. Medicine. 2022.", "doi": "10.1097/MD.0000000000031035", "pmcid": "PMC9592469", "url": "https://pubmed.ncbi.nlm.nih.gov/36281113/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36281113/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36281113", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "null", "what_it_shows": "In chronic stroke, four-week randomized low-to-moderate cycling improved submaximal indices and six-minute walking but did not improve VO2peak.", "what_it_does_not_show": "Four weeks lies outside the registered 6-24 week horizon; intensity was not established by measured LT1 and submaximal benefit does not cross the registered VO2peak outcome.", "confounders_present": [ "Four weeks lies outside the registered 6-24 week horizon; intensity was not established by measured LT1 and submaximal benefit does not cross the registered VO2peak outcome." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 3, "pmid": "20121952", "title": "Endurance exercise training in older patients with heart failure: results from a randomized, controlled, single-blind trial.", "citation": "Brubaker PH, Moore JB, Stewart KP et al. Endurance exercise training in older patients with heart failure: results from a randomized, controlled, single-blind trial. Journal of the American Geriatrics Society. 2009.", "doi": "10.1111/j.1532-5415.2009.02499.x", "pmcid": "PMC2950161", "url": "https://pubmed.ncbi.nlm.nih.gov/20121952/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20121952/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID20121952", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [ "M2" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "A 59-patient older HFrEF randomized attention-controlled trial found no group difference in VO2peak or ventilatory anaerobic threshold after 16 weeks of supervised moderate training.", "what_it_does_not_show": "Heart-rate and exertion prescription does not verify below-VT1 exposure; the post hoc 26% responding subgroup cannot redefine the enrolled population.", "confounders_present": [ "Heart-rate and exertion prescription does not verify below-VT1 exposure; the post hoc 26% responding subgroup cannot redefine the enrolled population." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 4, "pmid": "8872288", "title": "Training level comparison study. Effect of high and low intensity exercise on ventilatory threshold in men with coronary artery disease.", "citation": "Jensen BE, Fletcher BJ, Rupp JC et al. Training level comparison study. Effect of high and low intensity exercise on ventilatory threshold in men with coronary artery disease. Journal of cardiopulmonary rehabilitation. 1996.", "doi": "10.1097/00008483-199607000-00003", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/8872288/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/8872288/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID8872288", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "In 186 men with coronary disease randomized to 50% or 85% peak VO2 training, both arms improved measured peak and threshold VO2, with larger improvements at high intensity.", "what_it_does_not_show": "The low arm was prescribed by percentage peak VO2, not individual LT1; no nonexercise comparator is described and equal session duration is not equal total work.", "confounders_present": [ "The low arm was prescribed by percentage peak VO2, not individual LT1; no nonexercise comparator is described and equal session duration is not equal total work." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 5, "pmid": "17685689", "title": "Impact of training intensity distribution on performance in endurance athletes.", "citation": "Esteve-Lanao J, Foster C, Seiler S et al. Impact of training intensity distribution on performance in endurance athletes. Journal of strength and conditioning research. 2007.", "doi": "10.1519/R-19725.1", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/17685689/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/17685689/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID17685689", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Twelve subelite runners randomized to more time below measured VT improved simulated race time more than a threshold-heavy programme over five months while high-intensity contribution was similar.", "what_it_does_not_show": "Both arms included higher-intensity running; this is training-distribution and race-performance evidence, not isolated below-VT1 versus no-training VO2max sufficiency or volume-matched superiority.", "confounders_present": [ "Both arms included higher-intensity running; this is training-distribution and race-performance evidence, not isolated below-VT1 versus no-training VO2max sufficiency or volume-matched superiority." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 6, "pmid": "31584766", "title": "Effects of high-intensity interval training compared to moderate-intensity continuous training on maximal oxygen consumption and blood pressure in healthy men: A randomized controlled trial.", "citation": "Arboleda-Serna VH, Feito Y, Patiño-Villada FA et al. Effects of high-intensity interval training compared to moderate-intensity continuous training on maximal oxygen consumption and blood pressure in healthy men: A randomized controlled trial. Biomedica : revista del Instituto Nacional de Salud. 2019.", "doi": "10.7705/biomedica.4451", "pmcid": "PMC7357372", "url": "https://pubmed.ncbi.nlm.nih.gov/31584766/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31584766/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID31584766", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A 44-man randomized trial found no significant eight-week between-arm VO2max difference for low-volume HIIT versus heart-rate-defined continuous training, with a greater systolic-pressure decrease under continuous training.", "what_it_does_not_show": "The continuous arm's within-group VO2max change was nonsignificant; percentage HRmax does not verify LT1 and programmes were not volume matched.", "confounders_present": [ "The continuous arm's within-group VO2max change was nonsignificant; percentage HRmax does not verify LT1 and programmes were not volume matched." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 7, "pmid": "39133775", "title": "Effects of different exercise interventions on cardiopulmonary function in male tobacco-dependent college students.", "citation": "Zhou Y, Feng W, Zhang N et al. Effects of different exercise interventions on cardiopulmonary function in male tobacco-dependent college students. Journal of sports sciences. 2024.", "doi": "10.1080/02640414.2024.2390303", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/39133775/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39133775/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39133775", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Ten-week randomized HIIT and continuous-training interventions improved cardiopulmonary measurements in tobacco-dependent male students compared with nonexercise.", "what_it_does_not_show": "The abstract does not establish measured threshold prescription or isolate the VO2max superiority contrast; tobacco-related subgroup results cannot be generalized to all adults.", "confounders_present": [ "The abstract does not establish measured threshold prescription or isolate the VO2max superiority contrast; tobacco-related subgroup results cannot be generalized to all adults." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 8, "pmid": "35191412", "title": "Which high-intensity interval training program is more effective in patients with coronary artery disease?", "citation": "Okur I, Aksoy CC, Yaman F et al. Which high-intensity interval training program is more effective in patients with coronary artery disease? International journal of rehabilitation research. Internationale Zeitschrift fur Rehabilitationsforschung. Revue internationale de recherches de readaptation. 2022.", "doi": "10.1097/MRR.0000000000000524", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/35191412/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35191412/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID35191412", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "contradicts", "what_it_shows": "A 20-patient coronary rehabilitation trial reported larger estimated VO2max improvement in two HIIT arms than continuous training, while quality-of-life and walking comparisons were similar.", "what_it_does_not_show": "VO2max was estimated rather than measured laboratory gas exchange; tiny arms and no verified LT1 or volume matching prevent a direct registered-superiority inference.", "confounders_present": [ "VO2max was estimated rather than measured laboratory gas exchange; tiny arms and no verified LT1 or volume matching prevent a direct registered-superiority inference." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 9, "pmid": "22648463", "title": "High intensity interval exercise training in overweight young women.", "citation": "Sijie T, Hainai Y, Fengying Y et al. High intensity interval exercise training in overweight young women. The Journal of sports medicine and physical fitness. 2012.", "doi": "", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/22648463/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/22648463/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID22648463", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Sixty overweight young women randomized to twelve-week HIIT, continuous training at 50% VO2max, or nontraining showed fitness improvements in both exercise arms with larger HIIT effect sizes.", "what_it_does_not_show": "The continuous dose was defined by percentage VO2max rather than measured LT1; the report supports low-intensity training causation in this cohort but not registered exclusive-zone superiority.", "confounders_present": [ "The continuous dose was defined by percentage VO2max rather than measured LT1; the report supports low-intensity training causation in this cohort but not registered exclusive-zone superiority." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 10, "pmid": "21450580", "title": "Aerobic interval training reduces blood pressure and improves myocardial function in hypertensive patients.", "citation": "Molmen-Hansen HE, Stolen T, Tjonna AE et al. Aerobic interval training reduces blood pressure and improves myocardial function in hypertensive patients. European journal of preventive cardiology. 2012.", "doi": "10.1177/1741826711400512", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/21450580/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/21450580/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID21450580", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M3" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "contradicts", "what_it_shows": "An 88-patient randomized isocaloric comparison found twelve-week VO2max increases of 15% under interval training and 5% under moderate continuous training, alongside blood-pressure improvement.", "what_it_does_not_show": "The continuous prescription was about 60% VO2max, not individually verified below-VT1; blood pressure was primary and equal energy expenditure does not isolate the threshold boundary.", "confounders_present": [ "The continuous prescription was about 60% VO2max, not individually verified below-VT1; blood pressure was primary and equal energy expenditure does not isolate the threshold boundary." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 11, "pmid": "25580979", "title": "[High versus moderate intense running exercise - effects on cardiometabolic risk-factors in untrained males].", "citation": "Kemmler W, Lell M, Scharf M et al. [High versus moderate intense running exercise - effects on cardiometabolic risk-factors in untrained males]. Deutsche medizinische Wochenschrift (1946). 2015.", "doi": "10.1055/s-0040-100423", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/25580979/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25580979/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "RUSH_81_men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "contradicts", "what_it_shows": "The 81-man RUSH crossover study found larger VO2max gains with high-intensity than energy-comparable continuous running, while several cardiometabolic changes did not differ.", "what_it_does_not_show": "The moderate prescription used percentage HRmax rather than individual LT1; this and PMID24738073 are reports of the same study, not independent causal lines.", "confounders_present": [ "The moderate prescription used percentage HRmax rather than individual LT1; this and PMID24738073 are reports of the same study, not independent causal lines." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 12, "pmid": "37650003", "title": "Psychological and Physiological Responses Across Six Weeks of HIIT and MICT in Previously Inactive, Young Adults.", "citation": "Dunston ER, Taylor K. Psychological and Physiological Responses Across Six Weeks of HIIT and MICT in Previously Inactive, Young Adults. International journal of exercise science. 2023.", "doi": "10.70252/FQAV8949", "pmcid": "PMC10464759", "url": "https://pubmed.ncbi.nlm.nih.gov/37650003/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37650003/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37650003", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Twenty inactive young adults randomized to six-week HIIT or continuous training improved VO2max and peak power similarly, with enjoyment falling during unsupervised exercise.", "what_it_does_not_show": "No nonexercise control or verified below-LT1 prescription is described; supervision and adherence can affect realized dose, and failure to find a difference does not prove equivalence.", "confounders_present": [ "No nonexercise control or verified below-LT1 prescription is described; supervision and adherence can affect realized dose, and failure to find a difference does not prove equivalence." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 13, "pmid": "29556771", "title": "Effects of low-volume high-intensity interval training in a community setting: a pilot study.", "citation": "Reljic D, Wittmann F, Fischer JE. Effects of low-volume high-intensity interval training in a community setting: a pilot study. European journal of applied physiology. 2018.", "doi": "10.1007/s00421-018-3845-8", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/29556771/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29556771/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID29556771", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "In a 34-person community pilot, eight-week continuous and two interval-training regimens increased VO2max, with less time commitment in the interval arms.", "what_it_does_not_show": "Active comparator and small incomplete groups prevent no-training inference; percentage HRmax and unequal time do not test volume-matched below-LT1 superiority.", "confounders_present": [ "Active comparator and small incomplete groups prevent no-training inference; percentage HRmax and unequal time do not test volume-matched below-LT1 superiority." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 14, "pmid": "31200443", "title": "Personalized Moderate-Intensity Exercise Training Combined with High-Intensity Interval Training Enhances Training Responsiveness.", "citation": "Byrd BR, Keith J, Keeling SM et al. Personalized Moderate-Intensity Exercise Training Combined with High-Intensity Interval Training Enhances Training Responsiveness. International journal of environmental research and public health. 2019.", "doi": "10.3390/ijerph16122088", "pmcid": "PMC6616602", "url": "https://pubmed.ncbi.nlm.nih.gov/31200443/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31200443/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID31200443", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "contradicts", "what_it_shows": "A 54-person randomized trial found greater VO2max and metabolic-score improvements under personalized continuous-plus-interval and resistance training than standardized continuous training or nonexercise.", "what_it_does_not_show": "The intervention combined intensity prescription, intervals and resistance work, so benefits cannot be attributed exclusively to below-VT1 exercise or individualized threshold targeting.", "confounders_present": [ "The intervention combined intensity prescription, intervals and resistance work, so benefits cannot be attributed exclusively to below-VT1 exercise or individualized threshold targeting." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 15, "pmid": "24738073", "title": "High versus moderate intensity running exercise to impact cardiometabolic risk factors: the randomized controlled RUSH-study.", "citation": "Kemmler W, Scharf M, Lell M et al. High versus moderate intensity running exercise to impact cardiometabolic risk factors: the randomized controlled RUSH-study. BioMed research international. 2014.", "doi": "10.1155/2014/843095", "pmcid": "PMC3967804", "url": "https://pubmed.ncbi.nlm.nih.gov/24738073/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/24738073/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "RUSH_81_men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "The RUSH isocaloric sixteen-week trial found fitness and metabolic-score improvements under both intensity programmes compared with the sedentary phase.", "what_it_does_not_show": "The moderate arm used percentage HRmax rather than LT1; PMID25580979 reports this same parent trial with additional outcomes, so apparent replications are grouped.", "confounders_present": [ "The moderate arm used percentage HRmax rather than LT1; PMID25580979 reports this same parent trial with additional outcomes, so apparent replications are grouped." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 16, "pmid": "40933327", "title": "Aquatic High-Intensity Interval Training Improves Vascular Function, Whereas Aquatic Moderate-Intensity Continuous Training Lowers Resting Heart Rate in Overweight and Obese Young Adults: A Randomized Controlled Trial.", "citation": "Yu Z, Tang S, Hu M et al. Aquatic High-Intensity Interval Training Improves Vascular Function, Whereas Aquatic Moderate-Intensity Continuous Training Lowers Resting Heart Rate in Overweight and Obese Young Adults: A Randomized Controlled Trial. Journal of sports science & medicine. 2025.", "doi": "10.52082/jssm.2025.666", "pmcid": "PMC12418185", "url": "https://pubmed.ncbi.nlm.nih.gov/40933327/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40933327/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40933327", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Sixty-one overweight or obese young adults randomized to aquatic continuous training, intervals or control showed aerobic-capacity gains in both exercise arms and differing vascular or heart-rate responses.", "what_it_does_not_show": "Heart-rate prescription and aquatic modality do not verify below-LT1 exposure; correlations between VO2max and vascular change are not mediation tests.", "confounders_present": [ "Heart-rate prescription and aquatic modality do not verify below-LT1 exposure; correlations between VO2max and vascular change are not mediation tests." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 17, "pmid": "10484570", "title": "Familial aggregation of VO(2max) response to exercise training: results from the HERITAGE Family Study.", "citation": "Bouchard C, An P, Rice T et al. Familial aggregation of VO(2max) response to exercise training: results from the HERITAGE Family Study. Journal of applied physiology (Bethesda, Md. : 1985). 1999.", "doi": "10.1152/jappl.1999.87.3.1003", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/10484570/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/10484570/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "The HERITAGE standardized twenty-week programme increased average absolute VO2max by approximately 400 mL/min, with wide within-cohort heterogeneity and familial resemblance.", "what_it_does_not_show": "There was no randomized nonexercise contrast and training progressed to 75% VO2max, not exclusive below-LT1; low measured gains cannot define an outcome-based exclusion.", "confounders_present": [ "There was no randomized nonexercise contrast and training progressed to 75% VO2max, not exclusive below-LT1; low measured gains cannot define an outcome-based exclusion." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 18, "pmid": "41221589", "title": "N-Palmitoyl Glutamine Is a Candidate Mediator of Cardiorespiratory Fitness.", "citation": "Robbins JM, Benson M, Verkerke ARP et al. N-Palmitoyl Glutamine Is a Candidate Mediator of Cardiorespiratory Fitness. Circulation. 2026.", "doi": "10.1161/CIRCULATIONAHA.125.074187", "pmcid": "PMC12862896", "url": "https://pubmed.ncbi.nlm.nih.gov/41221589/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41221589/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training_plus_external_cohorts", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HERITAGE and replication cohorts associated N-palmitoyl glutamine with fitness, training-associated increases and lower mortality, while cell experiments increased mitochondrial indices.", "what_it_does_not_show": "Cell sufficiency and human associations do not establish endogenous human necessity or VO2max mediation of mortality; HERITAGE measurements overlap its other reports.", "confounders_present": [ "Cell sufficiency and human associations do not establish endogenous human necessity or VO2max mediation of mortality; HERITAGE measurements overlap its other reports." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "HERITAGE training observations recur across molecular reports; external FHS/JHS/MESA cohorts do not create mediator-specific perturbation." ] }, { "n": 19, "pmid": "11194119", "title": "Cardiac output and stroke volume changes with endurance training: the HERITAGE Family Study.", "citation": "Wilmore JH, Stanforth PR, Gagnon J et al. Cardiac output and stroke volume changes with endurance training: the HERITAGE Family Study. Medicine and science in sports and exercise. 2001.", "doi": "10.1097/00005768-200101000-00016", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/11194119/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/11194119/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "HERITAGE duplicate exercise measurements found increased stroke volume and oxygen extraction after standardized twenty-week training, with demographic variation.", "what_it_does_not_show": "Exposure progressed from 55% to 75% VO2max without individual LT1 verification or nonexercise controls; central and peripheral adaptation undermine a unique mitochondrial-zone explanation.", "confounders_present": [ "Exposure progressed from 55% to 75% VO2max without individual LT1 verification or nonexercise controls; central and peripheral adaptation undermine a unique mitochondrial-zone explanation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 20, "pmid": "11689732", "title": "Familial resemblance in ventilatory threshold: the HERITAGE Family Study.", "citation": "Gaskill SE, Rice T, Bouchard C et al. Familial resemblance in ventilatory threshold: the HERITAGE Family Study. Medicine and science in sports and exercise. 2001.", "doi": "10.1097/00005768-200111000-00006", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/11689732/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/11689732/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HERITAGE family analyses found familial resemblance in baseline ventilatory threshold and its twenty-week training response.", "what_it_does_not_show": "Familial covariance contains shared environment and cannot serve as Mendelian randomization or independent causal proof; it uses the same training cohort.", "confounders_present": [ "Familial covariance contains shared environment and cannot serve as Mendelian randomization or independent causal proof; it uses the same training cohort." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 21, "pmid": "14600558", "title": "Heart rate versus %VO2max: age, sex, race, initial fitness, and training response--HERITAGE.", "citation": "Skinner JS, Gaskill SE, Rankinen T et al. Heart rate versus %VO2max: age, sex, race, initial fitness, and training response--HERITAGE. Medicine and science in sports and exercise. 2003.", "doi": "10.1249/01.MSS.0000093607.57995.E3", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/14600558/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/14600558/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "ErratumIn: PMID not supplied" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "HERITAGE analysis found heart rate at a given percentage VO2max remained similar after training despite higher fitness and lower heart rate at fixed workload.", "what_it_does_not_show": "This validates the study's relative-intensity adjustment, not individual LT1 placement; an attached erratum is flagged in the source record but its details and identifier were not supplied.", "confounders_present": [ "This validates the study's relative-intensity adjustment, not individual LT1 placement; an attached erratum is flagged in the source record but its details and identifier were not supplied." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 22, "pmid": "21183627", "title": "Genomic predictors of the maximal O₂ uptake response to standardized exercise training programs.", "citation": "Bouchard C, Sarzynski MA, Rice TK et al. Genomic predictors of the maximal O₂ uptake response to standardized exercise training programs. Journal of applied physiology (Bethesda, Md. : 1985). 2011.", "doi": "10.1152/japplphysiol.00973.2010", "pmcid": "PMC3098655", "url": "https://pubmed.ncbi.nlm.nih.gov/21183627/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/21183627/", "tier": "A", "source_tier": "A", "kind": "genetic_association", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training_plus_STRRIDE_DREW", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A HERITAGE genome-wide analysis associated variants with VO2max trainability and reported selected associations replicated in STRRIDE, DREW and Black HERITAGE participants.", "what_it_does_not_show": "Prediction of response is not an instrument for exercise exposure or fitness-mediated survival; discovery and partial replication do not constitute an isolated below-LT1 causal line.", "confounders_present": [ "Prediction of response is not an instrument for exercise exposure or fitness-mediated survival; discovery and partial replication do not constitute an isolated below-LT1 causal line." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "HERITAGE discovery and partial DREW/STRRIDE replication are overlapping genetic prediction, not independent exposure perturbations." ] }, { "n": 23, "pmid": "20930125", "title": "A transcriptional map of the impact of endurance exercise training on skeletal muscle phenotype.", "citation": "Keller P, Vollaard NB, Gustafsson T et al. A transcriptional map of the impact of endurance exercise training on skeletal muscle phenotype. Journal of applied physiology (Bethesda, Md. : 1985). 2011.", "doi": "10.1152/japplphysiol.00634.2010", "pmcid": "PMC3253010", "url": "https://pubmed.ncbi.nlm.nih.gov/20930125/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20930125/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Timmons_training_transcriptome_plus_HERITAGE", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Human training transcriptomes and selectively bred rats identified regulatory networks associated with larger aerobic-capacity responses.", "what_it_does_not_show": "Outcome-defined high and low responders do not create preregistered causal subtypes; transcriptomic covariance and selected-breed comparisons do not isolate below-LT1 training or human necessity.", "confounders_present": [ "Outcome-defined high and low responders do not create preregistered causal subtypes; transcriptomic covariance and selected-breed comparisons do not isolate below-LT1 training or human necessity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 24, "pmid": "20133430", "title": "Using molecular classification to predict gains in maximal aerobic capacity following endurance exercise training in humans.", "citation": "Timmons JA, Knudsen S, Rankinen T et al. Using molecular classification to predict gains in maximal aerobic capacity following endurance exercise training in humans. Journal of applied physiology (Bethesda, Md. : 1985). 2010.", "doi": "10.1152/japplphysiol.01295.2009", "pmcid": "PMC2886694", "url": "https://pubmed.ncbi.nlm.nih.gov/20133430/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20133430/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Timmons_training_transcriptome_plus_HERITAGE", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Pretraining muscle RNA signatures predicted heterogeneous VO2max gains in independent training datasets, with associated variants assessed in HERITAGE.", "what_it_does_not_show": "Prediction and cross-validation are not causal perturbation or mortality mediation; shared discovery datasets with PMID20930125 and HERITAGE genotyping are not independent causal lines.", "confounders_present": [ "Prediction and cross-validation are not causal perturbation or mortality mediation; shared discovery datasets with PMID20930125 and HERITAGE genotyping are not independent causal lines." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 25, "pmid": "11719894", "title": "Changes in ventilatory threshold with exercise training in a sedentary population: the HERITAGE Family Study.", "citation": "Gaskill SE, Walker AJ, Serfass RA et al. Changes in ventilatory threshold with exercise training in a sedentary population: the HERITAGE Family Study. International journal of sports medicine. 2001.", "doi": "10.1055/s-2001-18522", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/11719894/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/11719894/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M2" ], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A retrospective HERITAGE analysis found training intensity relative to measured VT associated with threshold-VO2 change but not maximal-VO2 change.", "what_it_does_not_show": "Participants were not randomized below versus above VT, the programme progressed to 75% VO2max and lacked nonexercise controls; beginning below VT does not establish exclusive below-VT exposure.", "confounders_present": [ "Participants were not randomized below versus above VT, the programme progressed to 75% VO2max and lacked nonexercise controls; beginning below VT does not establish exclusive below-VT exposure." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 26, "pmid": "9502355", "title": "Reproducibility of cardiovascular, respiratory, and metabolic responses to submaximal exercise: the HERITAGE Family Study.", "citation": "Wilmore JH, Stanforth PR, Turley KR et al. Reproducibility of cardiovascular, respiratory, and metabolic responses to submaximal exercise: the HERITAGE Family Study. Medicine and science in sports and exercise. 1998.", "doi": "10.1097/00005768-199802000-00014", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/9502355/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/9502355/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Duplicate submaximal exercise tests across HERITAGE centres showed generally good reproducibility for cardiovascular and metabolic measurements.", "what_it_does_not_show": "Measurement reliability supports interpretation of observed changes but does not establish causal training effects or interchangeability of heart-rate zones and individual thresholds.", "confounders_present": [ "Measurement reliability supports interpretation of observed changes but does not establish causal training effects or interchangeability of heart-rate zones and individual thresholds." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 27, "pmid": "30646252", "title": "Association of Cardiorespiratory Fitness With Long-term Mortality Among Adults Undergoing Exercise Treadmill Testing.", "citation": "Mandsager K, Harb S, Cremer P et al. Association of Cardiorespiratory Fitness With Long-term Mortality Among Adults Undergoing Exercise Treadmill Testing. JAMA network open. 2018.", "doi": "10.1001/jamanetworkopen.2018.3605", "pmcid": "PMC6324439", "url": "https://pubmed.ncbi.nlm.nih.gov/30646252/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30646252/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID30646252", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [ "M4" ], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "In 122007 clinical treadmill patients, greater estimated exercise capacity was associated with lower subsequent all-cause mortality after risk adjustment.", "what_it_does_not_show": "Fitness was estimated from treadmill performance rather than direct gas exchange, and referral selection, baseline illness and residual confounding prevent fitness-mediated causal survival inference.", "confounders_present": [ "Fitness was estimated from treadmill performance rather than direct gas exchange, and referral selection, baseline illness and residual confounding prevent fitness-mediated causal survival inference." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 28, "pmid": "38834850", "title": "Proteomic analysis of cardiorespiratory fitness for prediction of mortality and multisystem disease risks.", "citation": "Perry AS, Farber-Eger E, Gonzales T et al. Proteomic analysis of cardiorespiratory fitness for prediction of mortality and multisystem disease risks. Nature medicine. 2024.", "doi": "10.1038/s41591-024-03039-x", "pmcid": "PMC11186767", "url": "https://pubmed.ncbi.nlm.nih.gov/38834850/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38834850/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Proteomic_fitness_multicohort_including_HERITAGE", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A proteomic fitness score developed across cohorts predicted mortality and multisystem disease and changed during a twenty-week exercise programme.", "what_it_does_not_show": "A molecular score reflecting several biological traits does not isolate measured VO2max as a mortality mediator; training measurements overlap HERITAGE and prediction does not demonstrate intervention causation.", "confounders_present": [ "A molecular score reflecting several biological traits does not isolate measured VO2max as a mortality mediator; training measurements overlap HERITAGE and prediction does not demonstrate intervention causation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "Includes shared training molecular observations and new independent prognostic cohorts." ] }, { "n": 29, "pmid": "29701805", "title": "Cardiac rehabilitation fitness changes and subsequent survival.", "citation": "De Schutter A, Kachur S, Lavie CJ et al. Cardiac rehabilitation fitness changes and subsequent survival. European heart journal. Quality of care & clinical outcomes. 2018.", "doi": "10.1093/ehjqcco/qcy018", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/29701805/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29701805/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID29701805", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Among 1171 cardiac-rehabilitation completers, larger measured peak-VO2 improvements were associated with lower subsequent mortality after covariate adjustment.", "what_it_does_not_show": "Change-response groups were defined after treatment and adherence, recovery, disease severity and selection could affect both fitness gain and survival; no mediator-specific intervention was performed.", "confounders_present": [ "Change-response groups were defined after treatment and adherence, recovery, disease severity and selection could affect both fitness gain and survival; no mediator-specific intervention was performed." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 30, "pmid": "34045743", "title": "Human plasma proteomic profiles indicative of cardiorespiratory fitness.", "citation": "Robbins JM, Peterson B, Schranner D et al. Human plasma proteomic profiles indicative of cardiorespiratory fitness. Nature metabolism. 2021.", "doi": "10.1038/s42255-021-00400-z", "pmcid": "PMC9216203", "url": "https://pubmed.ncbi.nlm.nih.gov/34045743/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34045743/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "ErratumIn: PMID34446928" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "HERITAGE_training_plus_external_cohorts", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HERITAGE proteomic profiles predicted training-associated fitness changes and selected proteins also associated with mortality in another cohort.", "what_it_does_not_show": "Shared participants and biomarker prediction do not isolate causal pathways or fitness-mediated mortality; attached erratum PMID34446928 requires interpretation separately from the original study count.", "confounders_present": [ "Shared participants and biomarker prediction do not isolate causal pathways or fitness-mediated mortality; attached erratum PMID34446928 requires interpretation separately from the original study count." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 31, "pmid": "42574013", "title": "Physical Fitness and All-Cause Mortality in Older Adults.", "citation": "Wu MC, Hsu CT, Hsu HT et al. Physical Fitness and All-Cause Mortality in Older Adults. JAMA network open. 2026.", "doi": "10.1001/jamanetworkopen.2026.28227", "pmcid": "PMC13458872", "url": "https://pubmed.ncbi.nlm.nih.gov/42574013/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42574013/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42574013", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A 13423-person older-adult cohort associated better performance across fitness domains with lower subsequent mortality, including step-test capacity, strength and balance.", "what_it_does_not_show": "Step tests are not measured VO2max and several correlated capacities may reflect health reserve; multivariable adjustment does not isolate a fitness-mediated mortality effect.", "confounders_present": [ "Step tests are not measured VO2max and several correlated capacities may reflect health reserve; multivariable adjustment does not isolate a fitness-mediated mortality effect." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 32, "pmid": "34060253", "title": "The physiological impact of high-intensity interval training in octogenarians with comorbidities.", "citation": "Blackwell JEM, Gharahdaghi N, Brook MS et al. The physiological impact of high-intensity interval training in octogenarians with comorbidities. Journal of cachexia, sarcopenia and muscle. 2021.", "doi": "10.1002/jcsm.12724", "pmcid": "PMC8350218", "url": "https://pubmed.ncbi.nlm.nih.gov/34060253/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34060253/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID34060253", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "After an equal-duration control period, four-week HIIT in 28 comorbid octogenarians increased anaerobic threshold, muscle mass and mitochondrial oxidative-phosphorylation measurements.", "what_it_does_not_show": "The intervention was high intensity, nonrandomized and shorter than registered follow-up; parallel muscle and fitness changes do not establish necessity or below-LT1 specificity.", "confounders_present": [ "The intervention was high intensity, nonrandomized and shorter than registered follow-up; parallel muscle and fitness changes do not establish necessity or below-LT1 specificity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 33, "pmid": "32826632", "title": "Novel CPET Reference Values in Healthy Adults: Associations with Physical Activity.", "citation": "Wagner J, Knaier R, Infanger D et al. Novel CPET Reference Values in Healthy Adults: Associations with Physical Activity. Medicine and science in sports and exercise. 2021.", "doi": "10.1249/MSS.0000000000002454", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32826632/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32826632/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID32826632", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Direct CPET in 502 healthy adults provided age-specific maximal and submaximal reference values and associated vigorous activity with higher fitness.", "what_it_does_not_show": "Cross-sectional activity associations cannot substitute for randomized training; reference values depend on recruitment, modality and measurement rather than a universal wearable score.", "confounders_present": [ "Cross-sectional activity associations cannot substitute for randomized training; reference values depend on recruitment, modality and measurement rather than a universal wearable score." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 34, "pmid": "33966081", "title": "Impact of cardiorespiratory fitness on survival in men with low socioeconomic status.", "citation": "Jae SY, Kurl S, Bunsawat K et al. Impact of cardiorespiratory fitness on survival in men with low socioeconomic status. European journal of preventive cardiology. 2021.", "doi": "10.1177/2047487319901057", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33966081/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33966081/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33966081", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Directly measured peak-VO2 fitness in 2368 Finnish men was associated with lower long-term mortality across socioeconomic strata.", "what_it_does_not_show": "Residual illness, behavioural and socioeconomic differences remain; baseline direct measurement strengthens prognosis but does not isolate intervention-induced VO2max as mediator.", "confounders_present": [ "Residual illness, behavioural and socioeconomic differences remain; baseline direct measurement strengthens prognosis but does not isolate intervention-induced VO2max as mediator." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 35, "pmid": "42156172", "title": "Joint non-linear dose-response associations of device-measured physical activity and cardiorespiratory fitness with cardiovascular disease: a cohort and Mendelian randomisation study.", "citation": "Liang Z, Du S, Zhao S et al. Joint non-linear dose-response associations of device-measured physical activity and cardiorespiratory fitness with cardiovascular disease: a cohort and Mendelian randomisation study. British journal of sports medicine. 2026.", "doi": "10.1136/bjsports-2025-111351", "pmcid": "PMC13479690", "url": "https://pubmed.ncbi.nlm.nih.gov/42156172/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42156172/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "UK Biobank activity and estimated fitness jointly predicted cardiovascular events, while genetically proxied fitness showed a modest inverse association with heart-failure risk.", "what_it_does_not_show": "Heart-failure incidence is not all-cause mortality or intervention-induced mediation; genetic instrument pleiotropy and estimated rather than direct fitness restrict causal interpretation.", "confounders_present": [ "Heart-failure incidence is not all-cause mortality or intervention-induced mediation; genetic instrument pleiotropy and estimated rather than direct fitness restrict causal interpretation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 36, "pmid": "37400433", "title": "Causal associations between cardiorespiratory fitness and type 2 diabetes.", "citation": "Cai L, Gonzales T, Wheeler E et al. Causal associations between cardiorespiratory fitness and type 2 diabetes. Nature communications. 2023.", "doi": "10.1038/s41467-023-38234-w", "pmcid": "PMC10318084", "url": "https://pubmed.ncbi.nlm.nih.gov/37400433/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37400433/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_with_Fenland_validation", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Genetic fitness instruments informed by exercise tests and resting heart rate supported lower type-2-diabetes risk with higher genetically predicted fitness.", "what_it_does_not_show": "Lifelong genetically proxied fitness differs from a six-to-24-week training gain; diabetes risk and candidate proteomic mediators do not demonstrate fitness-mediated mortality.", "confounders_present": [ "Lifelong genetically proxied fitness differs from a six-to-24-week training gain; diabetes risk and candidate proteomic mediators do not demonstrate fitness-mediated mortality." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 37, "pmid": "42627955", "title": "The Effect of Cardiorespiratory and Muscular Fitness on Healthcare Costs Among Adults: A Triangulation Study.", "citation": "Vaaramo M, Kari JT, Korpelainen R et al. The Effect of Cardiorespiratory and Muscular Fitness on Healthcare Costs Among Adults: A Triangulation Study. Medicine and science in sports and exercise. 2026.", "doi": "10.1249/MSS.0000000000004115", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42627955/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42627955/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "NFBC_FinnGen_with_UKBiobank_fitness_instrument", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "A Finnish cohort associated higher step-test fitness with lower healthcare costs, but its CRF Mendelian-randomization estimate was statistically null.", "what_it_does_not_show": "Costs are not mortality; the null genetic estimate prevents treating all favourable fitness associations as independent convergent causal confirmation.", "confounders_present": [ "Costs are not mortality; the null genetic estimate prevents treating all favourable fitness associations as independent convergent causal confirmation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 38, "pmid": "42163317", "title": "Cardiorespiratory fitness, genetic susceptibility, and the risk of chronic obstructive pulmonary disease: findings from observational and two-sample bidirectional Mendelian randomisation analyses.", "citation": "Chen Z, Collings PJ, Shi Q et al. Cardiorespiratory fitness, genetic susceptibility, and the risk of chronic obstructive pulmonary disease: findings from observational and two-sample bidirectional Mendelian randomisation analyses. BMC medicine. 2026.", "doi": "10.1186/s12916-026-04854-4", "pmcid": "PMC13480046", "url": "https://pubmed.ncbi.nlm.nih.gov/42163317/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42163317/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Observational and bidirectional genetic analyses associated estimated cardiorespiratory fitness with lower COPD risk.", "what_it_does_not_show": "Estimated bike-test fitness and COPD incidence do not establish intervention-induced measured-VO2max mortality mediation; selection and instrument assumptions remain relevant.", "confounders_present": [ "Estimated bike-test fitness and COPD incidence do not establish intervention-induced measured-VO2max mortality mediation; selection and instrument assumptions remain relevant." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 39, "pmid": "39641749", "title": "Unpicking Causal Relationships Between Grip Strength and Cardiorespiratory Fitness: A Bidirectional Mendelian Randomization Study.", "citation": "Norris T, Cooper R, Garfield V et al. Unpicking Causal Relationships Between Grip Strength and Cardiorespiratory Fitness: A Bidirectional Mendelian Randomization Study. Scandinavian journal of medicine & science in sports. 2024.", "doi": "10.1111/sms.14775", "pmcid": "PMC11623293", "url": "https://pubmed.ncbi.nlm.nih.gov/39641749/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39641749/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Bidirectional genetic analysis favoured greater weight-scaled grip strength increasing weight-scaled fitness, with no detected reverse effect.", "what_it_does_not_show": "Fitness is not a universal cause of all functional domains; common body-weight scaling and instrument assumptions complicate interpretation and mortality was not tested.", "confounders_present": [ "Fitness is not a universal cause of all functional domains; common body-weight scaling and instrument assumptions complicate interpretation and mortality was not tested." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 40, "pmid": "38057395", "title": "Observational and genetic associations between cardiorespiratory fitness and cancer: a UK Biobank and international consortia study.", "citation": "Watts EL, Gonzales TI, Strain T et al. Observational and genetic associations between cardiorespiratory fitness and cancer: a UK Biobank and international consortia study. British journal of cancer. 2024.", "doi": "10.1038/s41416-023-02489-3", "pmcid": "PMC10781786", "url": "https://pubmed.ncbi.nlm.nih.gov/38057395/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38057395/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "UK Biobank fitness associations with selected cancers and genetic breast-cancer estimates weakened after adiposity adjustment.", "what_it_does_not_show": "Cancer incidence is not mortality mediation; shared body-composition pathways and fitness scaling prevent an isolated VO2max mediator interpretation.", "confounders_present": [ "Cancer incidence is not mortality mediation; shared body-composition pathways and fitness scaling prevent an isolated VO2max mediator interpretation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 41, "pmid": "39635017", "title": "Observational and genetic associations between cardiorespiratory fitness and age-related diseases: longitudinal analyses in the UK Biobank study.", "citation": "Lu H, Wang H, Li C et al. Observational and genetic associations between cardiorespiratory fitness and age-related diseases: longitudinal analyses in the UK Biobank study. The EPMA journal. 2024.", "doi": "10.1007/s13167-024-00382-4", "pmcid": "PMC11612119", "url": "https://pubmed.ncbi.nlm.nih.gov/39635017/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39635017/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "UK Biobank estimated fitness predicted several age-related diseases, whereas MR support in the abstract was limited to Parkinson disease and small-vessel stroke.", "what_it_does_not_show": "Observational results do not automatically become causal because some genetic contrasts are positive; these outcomes do not isolate intervention-induced VO2max and mortality.", "confounders_present": [ "Observational results do not automatically become causal because some genetic contrasts are positive; these outcomes do not isolate intervention-induced VO2max and mortality." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 42, "pmid": "38864459", "title": "Cardiorespiratory Fitness, Body Composition, Diabetes, and Longevity: A 2-Sample Mendelian Randomization Study.", "citation": "Kjaergaard AD, Ellervik C, Jessen N et al. Cardiorespiratory Fitness, Body Composition, Diabetes, and Longevity: A 2-Sample Mendelian Randomization Study. The Journal of clinical endocrinology and metabolism. 2025.", "doi": "10.1210/clinem/dgae393", "pmcid": "PMC12012764", "url": "https://pubmed.ncbi.nlm.nih.gov/38864459/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38864459/", "tier": "A", "source_tier": "A", "kind": "mendelian_randomization", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [ "M4" ], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "contradicts", "what_it_shows": "Bidirectional and multivariable MR found adiposity, lean mass and activity affected estimated VO2max, but genetically predicted VO2max showed no association with longevity or diabetes.", "what_it_does_not_show": "Genetic nulls depend on power, scaling and exclusion restriction and do not prove exercise lacks health benefit; lifelong estimated fitness is not a controlled training-induced mortality mediator.", "confounders_present": [ "Genetic nulls depend on power, scaling and exclusion restriction and do not prove exercise lacks health benefit; lifelong estimated fitness is not a controlled training-induced mortality mediator." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [ "Instrument draws on the shared UKBiobank submaximal fitness GWAS; conflicting MR papers are not wholly independent measurement systems." ] }, { "n": 43, "pmid": "36460766", "title": "Longitudinal cardio-respiratory fitness prediction through wearables in free-living environments.", "citation": "Spathis D, Perez-Pozuelo I, Gonzales TI et al. Longitudinal cardio-respiratory fitness prediction through wearables in free-living environments. NPJ digital medicine. 2022.", "doi": "10.1038/s41746-022-00719-1", "pmcid": "PMC9718831", "url": "https://pubmed.ncbi.nlm.nih.gov/36460766/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36460766/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36460766", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Wearable-data models estimated fitness in large cohorts and tracked longitudinal change, with external direct-VO2max testing in 181 participants.", "what_it_does_not_show": "Descriptive validation only: correlation and group prediction do not guarantee individual agreement, threshold placement or causal health benefit from changing a watch score.", "confounders_present": [ "Descriptive validation only: correlation and group prediction do not guarantee individual agreement, threshold placement or causal health benefit from changing a watch score." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 44, "pmid": "39797066", "title": "Validation of Aerobic Capacity (VO2max) and Pulse Oximetry in Wearable Technology.", "citation": "Carrier B, Marten Chaves S, Navalta JW. Validation of Aerobic Capacity (VO2max) and Pulse Oximetry in Wearable Technology. Sensors (Basel, Switzerland). 2025.", "doi": "10.3390/s25010275", "pmcid": "PMC11723475", "url": "https://pubmed.ncbi.nlm.nih.gov/39797066/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39797066/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39797066", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "A small Garmin fenix 6 validation study met its prespecified VO2max agreement criteria but found poor oxygen-saturation concordance.", "what_it_does_not_show": "Descriptive validation only: nineteen fitness participants and model-specific criteria do not validate all wearables, LT1 identification or clinical decision use.", "confounders_present": [ "Descriptive validation only: nineteen fitness participants and model-specific criteria do not validate all wearables, LT1 identification or clinical decision use." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 45, "pmid": "35925653", "title": "Prediction of VO2max From Submaximal Exercise Using the Smartphone Application Myworkout GO: Validation Study of a Digital Health Method.", "citation": "Helgerud J, Haglo H, Hoff J. Prediction of VO2max From Submaximal Exercise Using the Smartphone Application Myworkout GO: Validation Study of a Digital Health Method. JMIR cardio. 2022.", "doi": "10.2196/38570", "pmcid": "PMC9389381", "url": "https://pubmed.ncbi.nlm.nih.gov/35925653/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35925653/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID35925653", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A standardized smartphone submaximal-exercise application closely predicted direct VO2max in 162 healthy volunteers under supervised test conditions.", "what_it_does_not_show": "Descriptive validation only: a structured treadmill protocol is not passive wrist sensing and does not demonstrate intervention efficacy, mortality benefit or below-LT1 prescription accuracy.", "confounders_present": [ "Descriptive validation only: a structured treadmill protocol is not passive wrist sensing and does not demonstrate intervention efficacy, mortality benefit or below-LT1 prescription accuracy." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 46, "pmid": "41337270", "title": "Machine Learning for VO2max Predictions: A Comparison of Methods using Wearable Sensor Data.", "citation": "Syversen AB, Dosis A, Zhang Z et al. Machine Learning for VO2max Predictions: A Comparison of Methods using Wearable Sensor Data. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference. 2025.", "doi": "10.1109/EMBC58623.2025.11253438", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/41337270/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41337270/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID41337270", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Clinical wearable ECG and accelerometer models predicted VO2max with moderate cross-validated correlation and roughly 3.35 mL/kg/min error, with linear regression performing best.", "what_it_does_not_show": "Descriptive validation only: cross-validation in a specific dataset does not establish external transportability, individual treatment-change accuracy or causal intervention benefit.", "confounders_present": [ "Descriptive validation only: cross-validation in a specific dataset does not establish external transportability, individual treatment-change accuracy or causal intervention benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 47, "pmid": "42743109", "title": "The accuracy of VO2 max, heart rate and energy expenditure measurements from Google Pixel Watch 3.", "citation": "Lambe R, Schumann M, Hamilton S et al. The accuracy of VO2 max, heart rate and energy expenditure measurements from Google Pixel Watch 3. PloS one. 2026.", "doi": "10.1371/journal.pone.0356808", "pmcid": "PMC13577386", "url": "https://pubmed.ncbi.nlm.nih.gov/42743109/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42743109/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42743109", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Pixel Watch 3 validation in 34 adults showed small mean VO2max bias but wide individual limits of agreement from about minus12.56 to plus11.50 mL/kg/min.", "what_it_does_not_show": "Descriptive validation only: low average bias can conceal large individual errors; these estimates cannot substitute for measured thresholds or small laboratory fitness changes.", "confounders_present": [ "Descriptive validation only: low average bias can conceal large individual errors; these estimates cannot substitute for measured thresholds or small laboratory fitness changes." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 48, "pmid": "39083800", "title": "Assessing the Accuracy of Smartwatch-Based Estimation of Maximum Oxygen Uptake Using the Apple Watch Series 7: Validation Study.", "citation": "Caserman P, Yum S, Göbel S et al. Assessing the Accuracy of Smartwatch-Based Estimation of Maximum Oxygen Uptake Using the Apple Watch Series 7: Validation Study. JMIR biomedical engineering. 2024.", "doi": "10.2196/59459", "pmcid": "PMC11325102", "url": "https://pubmed.ncbi.nlm.nih.gov/39083800/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39083800/", "tier": "A", "source_tier": "A", "kind": "validation_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39083800", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Apple Watch Series7 validation in nineteen adults underestimated mean fitness versus cycle-ergometer gas exchange and showed 15.79% mean absolute percentage error and poor reliability.", "what_it_does_not_show": "Descriptive validation only: cycling versus outdoor-running criterion differences and tiny sample restrict device conclusions; the result does not test whether exercise improves fitness.", "confounders_present": [ "Descriptive validation only: cycling versus outdoor-running criterion differences and tiny sample restrict device conclusions; the result does not test whether exercise improves fitness." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 49, "pmid": "26146564", "title": "Is a threshold-based model a superior method to the relative percent concept for establishing individual exercise intensity? a randomized controlled trial.", "citation": "Wolpern AE, Burgos DJ, Janot JM et al. Is a threshold-based model a superior method to the relative percent concept for establishing individual exercise intensity? a randomized controlled trial. BMC sports science, medicine & rehabilitation. 2015.", "doi": "10.1186/s13102-015-0011-z", "pmcid": "PMC4491229", "url": "https://pubmed.ncbi.nlm.nih.gov/26146564/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/26146564/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID26146564", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph5, 1:Methods:paragraph6, 1:Methods:paragraph7, 1:Methods:paragraph9, 1:Methods:paragraph10, 1:Methods:paragraph11, 1:Methods:paragraph12, 2:Results:paragraph0, 2:Results:paragraph3, 2:Results:paragraph6, 2:Results:paragraph8. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "In 42 sedentary adults randomized to twelve-week threshold-based, heart-rate-reserve or nonexercise groups, both exercise programmes improved VO2max with larger increases under threshold-based prescription.", "what_it_does_not_show": "The threshold regimen used VT1 and VT2 and is not shown by the abstract to remain below VT1; individualized mixed-zone success cannot establish below-LT1-exclusive efficacy or superiority.", "confounders_present": [ "The threshold regimen used VT1 and VT2 and is not shown by the abstract to remain below VT1; individualized mixed-zone success cannot establish below-LT1-exclusive efficacy or superiority." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 50, "pmid": "17213964", "title": "Effectiveness of low-intensity endurance training.", "citation": "Meyer T, Auracher M, Heeg K et al. Effectiveness of low-intensity endurance training. International journal of sports medicine. 2007.", "doi": "10.1055/s-2006-924037", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/17213964/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/17213964/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID17213964", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M1", "M2" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "Thirty-nine untrained adults randomized to energy-matched low or moderate exercise or nontraining showed similar twelve-week VO2max gains in the exercise arms, while threshold-VO2 improvement favoured moderate training.", "what_it_does_not_show": "The anaerobic-threshold definition was baseline lactate plus1.5mmol/L, not explicitly LT1; differential maximal-test effort and small groups constrain the strict below-first-threshold interpretation.", "confounders_present": [ "The anaerobic-threshold definition was baseline lactate plus1.5mmol/L, not explicitly LT1; differential maximal-test effort and small groups constrain the strict below-first-threshold interpretation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 51, "pmid": "2072834", "title": "Exercise training below and above the lactate threshold in the elderly.", "citation": "Belman MJ, Gaesser GA. Exercise training below and above the lactate threshold in the elderly. Medicine and science in sports and exercise. 1991.", "doi": "", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/2072834/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/2072834/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID2072834", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M1", "M2" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "Eight weeks of training approximately 72% of measured lactate threshold increased VO2max by7% in older adults and exceeded the nontraining-control change, with similar gains to higher-intensity training.", "what_it_does_not_show": "Only nine low-intensity trainees and eight controls were reported; the abstract is publisher-truncated and does not detail threshold algorithm, control allocation or work matching, so replication and mechanism remain unresolved.", "confounders_present": [ "Only nine low-intensity trainees and eight controls were reported; the abstract is publisher-truncated and does not detail threshold algorithm, control allocation or work matching, so replication and mechanism remain unresolved." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 52, "pmid": "18580415", "title": "Effect of intensity of aerobic training on VO2max.", "citation": "Gormley SE, Swain DP, High R et al. Effect of intensity of aerobic training on VO2max. Medicine and science in sports and exercise. 2008.", "doi": "10.1249/MSS.0b013e31816c4839", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18580415/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18580415/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18580415", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M3" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "contradicts", "what_it_shows": "A six-week randomized volume-controlled study found VO2max gains in all three exercise arms, with progressively greater increases at higher exercise intensities.", "what_it_does_not_show": "The moderate arm used50%VO2reserve rather than individual LT1; this is a direct comparator challenge to blanket low-intensity superiority, not proof that every measured-threshold regimen is inferior.", "confounders_present": [ "The moderate arm used50%VO2reserve rather than individual LT1; this is a direct comparator challenge to blanket low-intensity superiority, not proof that every measured-threshold regimen is inferior." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 53, "pmid": "19204597", "title": "Volume of exercise and fitness nonresponse in sedentary, postmenopausal women.", "citation": "Sisson SB, Katzmarzyk PT, Earnest CP et al. Volume of exercise and fitness nonresponse in sedentary, postmenopausal women. Medicine and science in sports and exercise. 2009.", "doi": "10.1249/MSS.0b013e3181896c4e", "pmcid": "PMC2669311", "url": "https://pubmed.ncbi.nlm.nih.gov/19204597/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/19204597/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "DREW_training_dose_secondary_analysis", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A secondary DREW randomized-dose analysis found lower proportions with no observed fitness gain at greater weekly exercise volume among sedentary postmenopausal women.", "what_it_does_not_show": "The control arm was excluded from this report and50%VO2max was not a measuredLT1 prescription; response classification depends on measurement noise and cannot redefine baseline eligibility.", "confounders_present": [ "The control arm was excluded from this report and50%VO2max was not a measuredLT1 prescription; response classification depends on measurement noise and cannot redefine baseline eligibility." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 54, "pmid": "23752040", "title": "Does polarized training improve performance in recreational runners?", "citation": "Muñoz I, Seiler S, Bautista J et al. Does polarized training improve performance in recreational runners? International journal of sports physiology and performance. 2014.", "doi": "10.1123/ijspp.2012-0350", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/23752040/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/23752040/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID23752040", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Thirty recreational runners randomized to measured-threshold polarized or between-threshold distributions improved ten-kilometre race time, without a significant assigned-arm difference.", "what_it_does_not_show": "Both groups included about20% high intensity; the positive achieved-distribution subset was post hoc and cannot replace intention-to-treat results or prove exclusive below-VT1 VO2max superiority.", "confounders_present": [ "Both groups included about20% high intensity; the positive achieved-distribution subset was post hoc and cannot replace intention-to-treat results or prove exclusive below-VT1 VO2max superiority." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 55, "pmid": "23264537", "title": "Six weeks of a polarized training-intensity distribution leads to greater physiological and performance adaptations than a threshold model in trained cyclists.", "citation": "Neal CM, Hunter AM, Brennan L et al. Six weeks of a polarized training-intensity distribution leads to greater physiological and performance adaptations than a threshold model in trained cyclists. Journal of applied physiology (Bethesda, Md. : 1985). 2013.", "doi": "10.1152/japplphysiol.00652.2012", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/23264537/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/23264537/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "ErratumIn: PMID not supplied" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID23264537", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Twelve trained cyclists in a randomized crossover improved performance under both distributions, with greater selected gains after polarized training but no mitochondrial-enzyme increase.", "what_it_does_not_show": "Polarized exposure included20% high intensity, total weekly duration differed, and mitochondrial-marker nulls restrict a uniform oxidative-capacity account; an attached erratum lacked supplied identifier or details.", "confounders_present": [ "Polarized exposure included20% high intensity, total weekly duration differed, and mitochondrial-marker nulls restrict a uniform oxidative-capacity account; an attached erratum lacked supplied identifier or details." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [ "Randomized crossover periods share participants and possible carryover; not two independent trials." ] }, { "n": 56, "pmid": "40198065", "title": "Effects of Different Training Intensity Distributions on Endurance Capacity in Breast and Prostate Cancer Survivors: A Randomized Controlled Trial.", "citation": "Bauer N, Schneider J, Schlüter K et al. Effects of Different Training Intensity Distributions on Endurance Capacity in Breast and Prostate Cancer Survivors: A Randomized Controlled Trial. European journal of sport science. 2025.", "doi": "10.1002/ejsc.12287", "pmcid": "PMC11977512", "url": "https://pubmed.ncbi.nlm.nih.gov/40198065/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40198065/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40198065", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M2" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "Fifty-five cancer survivors randomized to isocaloric planned-polarized or threshold training improved peakVO2 and measured first-threshold outcomes similarly, with less time in the threshold arm.", "what_it_does_not_show": "The planned-polarized group actually trained pyramidal rather than as assigned; neither arm was exclusive belowLT1 and no nonexercise control was included.", "confounders_present": [ "The planned-polarized group actually trained pyramidal rather than as assigned; neither arm was exclusive belowLT1 and no nonexercise control was included." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 57, "pmid": "42560532", "title": "The effectiveness of polarized versus high-intensity training in moderately trained cyclists: a randomized parallel-design study.", "citation": "Moran-MacDonald A, Wilson S, Wu Z et al. The effectiveness of polarized versus high-intensity training in moderately trained cyclists: a randomized parallel-design study. European journal of applied physiology. 2026.", "doi": "10.1007/s00421-026-06380-w", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42560532/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42560532/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42560532", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [ "M3" ], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "null", "what_it_shows": "Nineteen moderately trained athletes randomized to HIIT with or without240additional weekly minutes of moderate-domain cycling had similar six-week performance and threshold changes.", "what_it_does_not_show": "Small sample leaves added-benefit uncertainty and interventions were deliberately unequal-volume; incremental null does not refute stand-alone belowLT1 efficacy in sedentary adults.", "confounders_present": [ "Small sample leaves added-benefit uncertainty and interventions were deliberately unequal-volume; incremental null does not refute stand-alone belowLT1 efficacy in sedentary adults." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 58, "pmid": "37999436", "title": "Periodized Aerobic Training between Thresholds Improves Submaximal Cardiorespiratory Parameters in Octogenarians.", "citation": "Cofre-Bolados C, Vidal F, Gutiérrez Espinoza H et al. Periodized Aerobic Training between Thresholds Improves Submaximal Cardiorespiratory Parameters in Octogenarians. Sports (Basel, Switzerland). 2023.", "doi": "10.3390/sports11110219", "pmcid": "PMC10675261", "url": "https://pubmed.ncbi.nlm.nih.gov/37999436/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37999436/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37999436", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A fourteen-week randomized programme in48nonfrail octogenarians improved first-ventilatory-threshold oxygen uptake and workload versus control.", "what_it_does_not_show": "Training occurred between thresholds and included intervals, while testing stopped before maximal exhaustion; submaximal improvement is not the registered belowVT1-only laboratoryVO2max endpoint.", "confounders_present": [ "Training occurred between thresholds and included intervals, while testing stopped before maximal exhaustion; submaximal improvement is not the registered belowVT1-only laboratoryVO2max endpoint." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 59, "pmid": "24022578", "title": "Limited benefit of Fatmax-test to derive training prescriptions.", "citation": "Schwindling S, Scharhag-Rosenberger F, Kindermann W et al. Limited benefit of Fatmax-test to derive training prescriptions. International journal of sports medicine. 2014.", "doi": "10.1055/s-0033-1349106", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/24022578/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/24022578/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID24022578", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Sixteen trained cyclists completing randomized-order constant-load bouts had similar fat oxidation across roughly50-70%VO2max despite different heart rates and lactate.", "what_it_does_not_show": "Acute fat oxidation does not establish chronic oxidative adaptation or unique maximal-fat-oxidation prescription benefit; Fatmax is not synonymous with measuredLT1.", "confounders_present": [ "Acute fat oxidation does not establish chronic oxidative adaptation or unique maximal-fat-oxidation prescription benefit; Fatmax is not synonymous with measuredLT1." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 60, "pmid": "38376995", "title": "Heavy-, Severe-, and Extreme-, but Not Moderate-Intensity Exercise Increase V̇o 2max and Thresholds after 6 wk of Training.", "citation": "Inglis EC, Iannetta D, Rasica L et al. Heavy-, Severe-, and Extreme-, but Not Moderate-Intensity Exercise Increase V̇o 2max and Thresholds after 6 wk of Training. Medicine and science in sports and exercise. 2024.", "doi": "10.1249/MSS.0000000000003406", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38376995/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38376995/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38376995", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "Eighty-four young adults randomized to five individualized intensity-domain programmes or nonexercise control showed no significant six-week moderate-domain VO2max or first-threshold improvement versus control, unlike all higher-intensity groups.", "what_it_does_not_show": "Fourteen participants per group leave precision limits and the moderate arm's positive within-arm estimate is not a positive control-adjusted crossing; baseline and training dose differ from the older-adult positive study, so no age-specific interaction is isolated.", "confounders_present": [ "Fourteen participants per group leave precision limits and the moderate arm's positive within-arm estimate is not a positive control-adjusted crossing; baseline and training dose differ from the older-adult positive study, so no age-specific interaction is isolated." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 61, "pmid": "33028588", "title": "Effect of exercise training for five years on all cause mortality in older adults-the Generation 100 study: randomised controlled trial.", "citation": "Stensvold D, Viken H, Steinshamn SL et al. Effect of exercise training for five years on all cause mortality in older adults-the Generation 100 study: randomised controlled trial. BMJ (Clinical research ed.). 2020.", "doi": "10.1136/bmj.m3485", "pmcid": "PMC7539760", "url": "https://pubmed.ncbi.nlm.nih.gov/33028588/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33028588/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33028588", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph3, 1:Methods:paragraph4, 1:Methods:paragraph5, 1:Methods:paragraph6, 1:Methods:paragraph9, 2:Results:paragraph6, 2:Results:paragraph17, 2:Results:paragraph18, 2:Results:paragraph19. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "null", "what_it_shows": "The1567-person five-year Generation100 trial found no mortality difference for combined supervised training versus activity-guideline controls, with a nonsignificant lower-mortality HIIT trend and modest peakVO2 separation.", "what_it_does_not_show": "Original Methods/Results confirm an active control, low observed event rate, imperfect adherence and substantial crossover; fitness itself was not manipulated separately, so this is a clinical-trajectory boundary rather than a mediator-specific refutation.", "confounders_present": [ "Original Methods/Results confirm an active control, low observed event rate, imperfect adherence and substantial crossover; fitness itself was not manipulated separately, so this is a clinical-trajectory boundary rather than a mediator-specific refutation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 62, "pmid": "18292295", "title": "Training at high exercise intensity promotes qualitative adaptations of mitochondrial function in human skeletal muscle.", "citation": "Daussin FN, Zoll J, Ponsot E et al. Training at high exercise intensity promotes qualitative adaptations of mitochondrial function in human skeletal muscle. Journal of applied physiology (Bethesda, Md. : 1985). 2008.", "doi": "10.1152/japplphysiol.01135.2007", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18292295/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18292295/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18292295", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Weak", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Muscle biopsies in seven trained athletes versus seven sedentary participants showed greater carbohydrate-linked respiratory capacity and selected complex adaptations in the trained group.", "what_it_does_not_show": "Cross-sectional trained status and tiny groups do not isolate training intensity causation, fatty-acid superiority or below-LT1 adaptation; an observational mechanistic comparison is not a randomized training trial.", "confounders_present": [ "Cross-sectional trained status and tiny groups do not isolate training intensity causation, fatty-acid superiority or below-LT1 adaptation; an observational mechanistic comparison is not a randomized training trial." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 63, "pmid": "18417645", "title": "Effect of interval versus continuous training on cardiorespiratory and mitochondrial functions: relationship to aerobic performance improvements in sedentary subjects.", "citation": "Daussin FN, Zoll J, Dufour SP et al. Effect of interval versus continuous training on cardiorespiratory and mitochondrial functions: relationship to aerobic performance improvements in sedentary subjects. American journal of physiology. Regulatory, integrative and comparative physiology. 2008.", "doi": "10.1152/ajpregu.00875.2007", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18417645/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18417645/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18417645", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC3" ], "favors_models": [], "evidence_class": "Strong", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Eleven sedentary adults in an eight-week work-and-duration-matched crossover improved VO2max with continuous and interval exercise, while mitochondrial respiratory capacity increased only after intervals and capillary density more after continuous training.", "what_it_does_not_show": "Continuous exposure was not verified belowLT1 in the abstract; correlations with performance do not establish mediator necessity, and the same participants in crossover periods do not constitute independent causal lines.", "confounders_present": [ "Continuous exposure was not verified belowLT1 in the abstract; correlations with performance do not establish mediator necessity, and the same participants in crossover periods do not constitute independent causal lines." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] } ], "verification_summary": { "load_bearing_claims_checked": 68, "verified": 68, "unverified": 0, "contradicted": 0, "note": "Verified attribution is distinct from mechanism truth or complete body access." }, "factual_issues_found": [], "cap_rules_applied": [ { "subclaim_id": "SC1", "cap": "Γ", "cap_source": "universal", "triggered": true, "trigger_text_quoted": "Biomarker change without functional/phenotypic change caps at Γ.", "specific_trigger": "Aerobic training changes muscle, cardiac and molecular physiology, but the selected oxidative and transcriptomic experiments do not isolate an exclusive below-first-threshold stimulus as the mediator of functional adaptation. Muscle-only or blood-cell biomarkers retain the universal Γ ceiling for downstream functional inference.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC2", "cap": "Γ", "cap_source": "none", "triggered": false, "trigger_text_quoted": "No universal or rubric cap binds SC2: measured VO2max is a functional phenotype, so \"Biomarker change without functional/phenotypic change caps at Γ\" does not apply. SC2's Γ ceiling comes from the boundary check (no field-valid positive perturbation at the registered scope).", "specific_trigger": "Belman and Gaesser (PMID2072834) report a genuine measured-VO2max gain during eight-week training approximately 72% of their measured lactate threshold. The accessible abstract does not identify the first threshold or its algorithm, and control allocation is incompletely accessible. It therefore cannot verify the exact registered below-LT1 exposure. The modern randomized moderate-domain experiment (PMID38376995) is null against control. This supports mechanistic plausibility and a positive adjacent exposure, but no verified positive same-scope crossing or causal boundary for the registered claim.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC4", "cap": "Β", "cap_source": "universal", "triggered": true, "trigger_text_quoted": "Pure association evidence — however large, however replicated — cannot exceed Β.", "specific_trigger": "Higher measured or estimated fitness reproducibly predicts survival, but no examined experiment isolates an intervention-induced VO2max gain as the mortality mediator. Genetics offers complementary causal tests for related disease outcomes, while the direct longevity MR (PMID38864459) was null. Pure mortality associations cannot cross Β, and the null genetic test does not provide a positive threshold crossing.", "resulting_ceiling": "Β" } ], "cap_precedence_resolutions": [ { "collision": "Perturbation in a defined setting versus broader inference", "subclaim_scope_cap_binds_on": "Aerobic training below the first measured lactate or ventilatory threshold increases cardiorespiratory fitness in adults.", "subclaim_scope_threshold_binds_on": "The precise experimentally tested subclaim scope", "resolution": "The clinical exercise equivalent crosses Δ only for the exact experimentally observed fitness outcome and exposure. Relative-intensity programmes retain their own scope and cannot silently substitute for below-measured-LT1 training. Mitochondrial biomarker and mortality-association caps bind the inference offered by those sources, without erasing a separate direct human fitness perturbation.", "note": "Convergent lines are assessed as a set; one weak leg is not re-capped over the assembled case." } ], "boundary_check_BGD": [ { "subclaim_id": "SC1", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Mitochondrial metrics alone", "Biomarker-only improvement without organismal benefit" ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Aerobic training changes muscle, cardiac and molecular physiology, but the selected oxidative and transcriptomic experiments do not isolate an exclusive below-first-threshold stimulus as the mediator of functional adaptation. Muscle-only or blood-cell biomarkers retain the universal Γ ceiling for downstream functional inference.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC2", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "No proxy substitution: direct laboratory cardiorespiratory performance required." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Belman and Gaesser (PMID2072834) report a genuine measured-VO2max gain during eight-week training approximately 72% of their measured lactate threshold. The accessible abstract does not identify the first threshold or its algorithm, and control allocation is incompletely accessible. It therefore cannot verify the exact registered below-LT1 exposure. The modern randomized moderate-domain experiment (PMID38376995) is null against control. This supports mechanistic plausibility and a positive adjacent exposure, but no verified positive same-scope crossing or causal boundary for the registered claim.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC3", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "A valid but null or opposing comparison does not cross a positive threshold." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "No examined direct volume-matched comparison establishes exclusive below-LT1 training as superior for laboratory VO2max. Gormley's volume-controlled trial (PMID18580415) favoured higher intensity under percentage-reserve prescriptions. Polarized successes contain substantial intervals, and volume-matched cancer-survivor training (PMID40198065) showed no between-arm benefit. These are informative challenges but not proof of universal inferiority of every below-LT1 prescription.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC4", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Associations and candidate biomarkers do not establish isolated mortality mediation." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Higher measured or estimated fitness reproducibly predicts survival, but no examined experiment isolates an intervention-induced VO2max gain as the mortality mediator. Genetics offers complementary causal tests for related disease outcomes, while the direct longevity MR (PMID38864459) was null. Pure mortality associations cannot cross Β, and the null genetic test does not provide a positive threshold crossing.", "ceiling_from_boundary_check": "Γ" } ], "thresholds_tested": [ { "subclaim_id": "SC1", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Prespecify measured LT1 exposure and use an independently informative mediator dissociation or rescue showing oxidative capacity is necessary for measured fitness gain, rather than merely moving in parallel." }, { "subclaim_id": "SC2", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Replicate verified exclusive below-LT1 training against no added training with documented threshold algorithm, adherence and maximal-test criteria across baseline-defined adult cohorts, including prospectively specified negative boundary contexts." }, { "subclaim_id": "SC3", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A preregistered direct comparison must show a positive between-arm laboratory-VO2 advantage for exclusive below-LT1 exercise at matched total work; mixed polarized exposure, unequal time or nonsignificant differences do not qualify." }, { "subclaim_id": "SC4", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Separate intervention-induced VO2max change from activity, adiposity and clinical recovery with mediator-specific intervention or valid independent instruments and adjudicated mortality, including adequate power and sensitivity analyses." } ], "generalization_check": { "generalization_tested": "yes", "context_boundary_mapped": "no", "internal_negative_controls": [ "Belman and Gaesser nontraining controls (PMID2072834)", "Inglis et al six-week randomized individualized moderate-domain null versus nonexercise controls (PMID38376995)", "Gormley volume-controlled higher-intensity comparators (PMID18580415)", "Older HFrEF attention-control null under a related moderate prescription (PMID20121952), distinguished from strict below-LT1 scope", "Training-induced mitochondrial-enzyme null despite performance gain in trained cyclists (PMID23264537)", "Longevity genetic null (PMID38864459)" ], "note": "An older-adult eight-week positive and a young-adult six-week individualized-domain null map experimental contexts, not a demonstrated age interaction: baseline fitness, dose and horizon differ. All context qualifiers were defined before outcomes. Percentage-HR heart-failure and brief-stroke nulls remain related boundaries with exposure or horizon mismatch; responders are never removed from eligibility." }, "falsification_patterns_met": [], "pitfalls_flagged": [ { "pitfall": "Mechanism conflation", "where": "Exclusive below-LT1 training, moderate exercise, polarized distributions, maximal fat oxidation, prognosis and wearable estimation are separate claims." }, { "pitfall": "Confirmation by biomarker", "where": "Muscle enzymes, transcriptomes, proteomic scores and watch estimates do not establish mortality benefit or oxidative mediator necessity." }, { "pitfall": "Scope fitted to the result", "where": "HERITAGE and DREW response groups and the achieved-distribution subset in PMID23752040 do not define baseline eligibility." }, { "pitfall": "Therapeutic effect misread as mechanistic proof", "where": "Training-package benefit does not isolate a unique threshold mechanism or a VO2max-to-mortality mediator." }, { "pitfall": "Negative field-valid perturbation read as a crossed threshold", "where": "Null superiority contrasts and null longevity MR provide no positive threshold crossing." }, { "pitfall": "Replication confused with reproduction", "where": "HERITAGE, RUSH and shared UKBiobank genetic-instrument reports are grouped; report counts do not establish independent causal lines." } ], "causal_tally_audit": { "tally_claimed_by_document": 0, "tally_after_audit": 0, "tally_unit": "Positive qualifying study units across scoped subclaims, not independent causal lines or full-claim necessity/sufficiency.", "screened_discriminating_contrasts": 22, "items_rejected": [ "Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines.", "No examined positive study unit presently verifies the exact registered exclusive below-first-threshold exposure. PMID2072834 retains genuine positive adjacent evidence, with threshold-definition and control-allocation uncertainty.", "The six wearable/application records are descriptive validation and never earn causal threshold credit.", "Retrospective responder groups, secondary HERITAGE/DREW/RUSH reports, animal mitochondrial metrics and incident-disease MR do not increase the main claim's positive crossing count." ] }, "steelman": { "case_one_rung_higher": "The strongest Δ case treats the older study-defined lactate threshold as the first threshold and combines its positive controlled fitness result with supportive moderate-training studies. That interpretation is plausible, but the original threshold algorithm and full control allocation remain unverified; percentage-reserve prescriptions and mixed-zone training do not resolve the exact exposure.", "case_one_rung_lower": "The strongest Β case emphasizes the lack of a verified same-scope positive functional crossing. However, controlled adjacent training results and direct physiological evidence support a plausible intervention mechanism beyond prognosis alone. Γ reflects that mechanistic and exposure bridge, without asserting the exact registered effect is established or disproven.", "which_rejected": "Δ is not awarded because the positive historical exposure cannot be verified as below the first threshold. Β alone understates the controlled adjacent functional and physiological evidence. The grade remains Γ pending exact exposure verification or a new positive strict-scope trial; the modern null does not map an Ε boundary without a verified same-scope positive.", "blocking_cap_threshold_or_missing_experiment": "Missing experiment: Randomize baseline-defined sedentary and stable clinical adult strata to exclusive measured-below-LT1 training, volume-matched above-LT1 training or attention control for twelve weeks. Determine LT1/VT1 with preregistered algorithms, repeat threshold testing as fitness changes, record achieved exposure and adherence, and blind direct-gas-exchange maximal-test adjudication. Add predefined skeletal-muscle oxidative measurements as candidate mediators without asserting them necessary solely because they correlate." }, "final_score": { "hsef_level": "Γ", "hsef_descriptor": "Mechanistically plausible, partial system support", "confidence": "Moderate", "confidence_rationale": "Evidence density and reproducibility set the confidence, not correctness and not reviewer access: at the registered below-first-threshold scope there is one small positive controlled trial and one modern randomized null, with no independent same-scope replication, and the 63 reports use heterogeneous comparators, prescription methods and control conditions. Access depth is recorded per ledger row and is not a determinant of the band.", "rests_on_non_peer_reviewed_work": false, "rationale": "The registered primary-subclaim rule returns Γ from SC2. General aerobic training can improve fitness and the older study has a real positive result. However, its study-defined lactate threshold cannot yet be equated with the registered first threshold. The modern six-week randomized moderate-domain comparison is null. An unverified positive exposure and a verified null cannot establish context-specific causality. The63 originals include intensity comparators, shared-cohort physiology, prognosis and descriptive device validation; they are not63 exclusive below-LT1 trials. Weakest-link returns Β; primary-subclaim and scope-matched return Γ." }, "role_of_mechanism": { "classification": "reinforcing / stabilizing factor", "derivation_step_matched": 5, "derivation": "Training is imposed before a measured fitness gain, so it is not merely its downstream consequence or co-occurrence. Removing this particular low-intensity mode is not shown to prevent gains achieved by other modes, and rate limitation is not established. It is not required for all fitness adaptation; the remaining framework role is reinforcing / stabilizing factor, describing augmentation of existing capacity rather than a universal unique driver.", "tournament_used_as_tiebreaker": false, "note": "Derived from causal direction, not tournament rank." }, "extended_scoring_MSD": { "momentum": { "value": "Mechanistic only", "artifact": "Recent randomized intensity-distribution work (PMID40198065,42560532) tests mixtures and performance, and molecular work (PMID41221589) examines candidate transducers. None is a verified pending result that cleanly supplies independent strict below-LT1 replication or mortality mediation.", "justification": "Recent randomized intensity-distribution work (PMID40198065,42560532) tests mixtures and performance, and molecular work (PMID41221589) examines candidate transducers. None is a verified pending result that cleanly supplies independent strict below-LT1 replication or mortality mediation." }, "stability": { "value": "Stable", "trigger": "No verified named pending strict below-LT1 control result was identified that predicts a score change. This is a bounded search statement, not proof that no such trial exists.", "justification": "No verified named pending strict below-LT1 control result was identified that predicts a score change. This is a bounded search statement, not proof that no such trial exists." }, "divergence": { "implied_level": null, "implied_level_basis": "No single field-implied level is defensible from conflicting framings.", "assessed_level": "Γ", "gap_in_rungs": null, "value": "Contested", "justification": "No manufactured field consensus or arithmetic gap." }, "calibration_note": "M/S/D never modify HSEF level or confidence." }, "change_record": { "applies": false, "prior_level": "none assigned", "prior_confidence": null, "prior_source": null, "derived_before_consulting_prior": true, "new_level": "Γ", "direction": "newly assigned", "what_moved_it": "Fresh primary evidence appraisal; not blinded.", "divergence_from_other_reviewers": null }, "proposed_decisive_experiments": [ { "name": "Registered boundary experiment", "experiment": "Randomize baseline-defined sedentary and stable clinical adult strata to exclusive measured-below-LT1 training, volume-matched above-LT1 training or attention control for twelve weeks. Determine LT1/VT1 with preregistered algorithms, repeat threshold testing as fitness changes, record achieved exposure and adherence, and blind direct-gas-exchange maximal-test adjudication. Add predefined skeletal-muscle oxidative measurements as candidate mediators without asserting them necessary solely because they correlate.", "readout": "Preregistered absolute and mass-scaled direct VO2max or VO2peak with maximal-effort criteria, confidence intervals and between-arm contrasts; objective threshold exposure, exercise dose and safety", "critical_control": "Matched total work for intensity comparison, attention control, stable cointerventions, baseline disease and fitness strata, body-composition measurement, intention-to-treat analysis and equal outcome-testing encouragement", "supporting_result": "Below-LT1 exercise improves measured capacity versus attention control reproducibly, with an independently mapped context boundary; superiority requires its separate positive matched-work comparison", "falsifying_result": "No fitness gain despite verified below-LT1 exposure and adequate adherence, power and maximal-test validity, or gains attributable to above-threshold contamination; no superiority is compatible with benefit" } ], "knowledge_gaps": [ { "name": "Gap 1", "statement": "Replication of exclusive below-first-threshold training against no added training with modern measurement and transparent older-study methods", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 2", "statement": "A reproducible definition linking popular five-zone labels with the three-domain first-threshold boundary", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 3", "statement": "Dose, progression, adherence and disease boundaries specified before outcomes rather than by responding subgroups", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 4", "statement": "An isolated oxidative mediator instead of parallel biomarker change", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 5", "statement": "Mortality mediation distinct from prognosis, disease-specific genetics and broad exercise benefit", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 6", "statement": "Individual wearable agreement and detectable change across hardware, algorithms, exercise modes and clinical cohorts", "relevance": "Limits mechanism identification or scope." } ], "review_metadata": { "review_date": "2026-10-13", "reviewer": "Codex", "evidence_base_note": "63 primary reports; literature cutoff 2026-10-13; source examination UTC date 2026-10-13; bounded critical review, not exhaustive systematic review.", "literature_tools_available": true, "literature_tools_note": "Life Sciences Literature PubMed/Entrez, separately logged public original-body retrieval, and Consensus Pro browser searches. Provider output retained as observed browser text with citation-link mappings, or as previously exported connector documents where present. AI synthesis is not primary full-text verification. Consensus retrieved/included counts are not examined-primary counts. Scite monthly limit was reached earlier in this session; no new Scite query or incoming citation-context audit is claimed for these cases. Tool receipts record actual use. Supplementary discovery outputs do not earn primary-count credit. No independent blinded review.", "skill_version": "5.3", "validator_run": "PASS: exact archived HSEF v5.3 validator rerun after final sealing.", "validator_warnings_addressed": "No warnings.", "limits": "Bounded source-based critical review; no complete-paper/supplement audit, independent scientific peer review or blinded calibration. Revision cases retain original prose outside the three framework output blocks and have explicit correction logs." }, "is_calibration_entry": { "value": false, "entry_role": "not_calibration", "blind_graded": null, "completed_blinded_calibration": false, "expected_band_sealed_at": "", "target_sha256": "", "target_authorship": "not applicable", "target_author_saw_review": null, "future_run_status": "not prepared", "unblinded_reason": "These topic families were selected from an editorial traffic-priority list. Selection was visible; no blind calibration or predetermined clinical verdict was preregistered." }, "upper_ladder_check": { "final_level_below_zeta": true, "equivalents_considered": [ { "kind": "mendelian_randomization", "available": true, "why_not_sufficient": "Genetic equivalents were considered directly, including positive diabetes or heart-failure contrasts and null longevity MR. They concern lifelong estimated fitness and related disease endpoints, not the registered below-LT1 training exposure. Withdrawal, independent natural experiments and mediator-specific pharmacology do not provide the exact clinical training claim an independently failing causal line in the examined set. Multiple similar exercise trials are replication, not automatically distinct causal lines; no universal association cap is reapplied to a genuinely convergent exact-scope set." }, { "kind": "natural_experiment", "available": false, "why_not_sufficient": "Genetic equivalents were considered directly, including positive diabetes or heart-failure contrasts and null longevity MR. They concern lifelong estimated fitness and related disease endpoints, not the registered below-LT1 training exposure. Withdrawal, independent natural experiments and mediator-specific pharmacology do not provide the exact clinical training claim an independently failing causal line in the examined set. Multiple similar exercise trials are replication, not automatically distinct causal lines; no universal association cap is reapplied to a genuinely convergent exact-scope set." }, { "kind": "dose_response_across_populations", "available": false, "why_not_sufficient": "Genetic equivalents were considered directly, including positive diabetes or heart-failure contrasts and null longevity MR. They concern lifelong estimated fitness and related disease endpoints, not the registered below-LT1 training exposure. Withdrawal, independent natural experiments and mediator-specific pharmacology do not provide the exact clinical training claim an independently failing causal line in the examined set. Multiple similar exercise trials are replication, not automatically distinct causal lines; no universal association cap is reapplied to a genuinely convergent exact-scope set." }, { "kind": "withdrawal_rechallenge", "available": false, "why_not_sufficient": "Genetic equivalents were considered directly, including positive diabetes or heart-failure contrasts and null longevity MR. They concern lifelong estimated fitness and related disease endpoints, not the registered below-LT1 training exposure. Withdrawal, independent natural experiments and mediator-specific pharmacology do not provide the exact clinical training claim an independently failing causal line in the examined set. Multiple similar exercise trials are replication, not automatically distinct causal lines; no universal association cap is reapplied to a genuinely convergent exact-scope set." }, { "kind": "therapeutic_perturbation_hard_endpoint", "available": false, "why_not_sufficient": "Genetic equivalents were considered directly, including positive diabetes or heart-failure contrasts and null longevity MR. They concern lifelong estimated fitness and related disease endpoints, not the registered below-LT1 training exposure. Withdrawal, independent natural experiments and mediator-specific pharmacology do not provide the exact clinical training claim an independently failing causal line in the examined set. Multiple similar exercise trials are replication, not automatically distinct causal lines; no universal association cap is reapplied to a genuinely convergent exact-scope set." } ], "convergence_present": false, "cap_reapplied_to_convergent_set": false }, "provenance_header": { "sources_total": 63, "claims_total": 68, "claims_verified": 68, "claims_unverified": 0, "claims_contradicted": 0, "tier_a_sources": 63, "generated_by": "Codex; HSEF v5.3", "gate_passed": true }, "claims": [ { "id": "C1", "text": "In 247 healthy older adults randomized to 16 weeks of cycling or attention control, training increased measured VO2max by 8.5% versus a slight control decline. Prescription was 70% peak heart rate rather than individual LT1 or VT1; supports conventional moderate aerobic training, not verified below-threshold training or mortality mediation.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 1 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C2", "text": "In chronic stroke, four-week randomized low-to-moderate cycling improved submaximal indices and six-minute walking but did not improve VO2peak. Four weeks lies outside the registered 6-24 week horizon; intensity was not established by measured LT1 and submaximal benefit does not cross the registered VO2peak outcome.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 2 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C3", "text": "A 59-patient older HFrEF randomized attention-controlled trial found no group difference in VO2peak or ventilatory anaerobic threshold after 16 weeks of supervised moderate training. Heart-rate and exertion prescription does not verify below-VT1 exposure; the post hoc 26% responding subgroup cannot redefine the enrolled population.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 3 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C4", "text": "In 186 men with coronary disease randomized to 50% or 85% peak VO2 training, both arms improved measured peak and threshold VO2, with larger improvements at high intensity. The low arm was prescribed by percentage peak VO2, not individual LT1; no nonexercise comparator is described and equal session duration is not equal total work.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 4 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C5", "text": "Twelve subelite runners randomized to more time below measured VT improved simulated race time more than a threshold-heavy programme over five months while high-intensity contribution was similar. Both arms included higher-intensity running; this is training-distribution and race-performance evidence, not isolated below-VT1 versus no-training VO2max sufficiency or volume-matched superiority.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 5 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C6", "text": "A 44-man randomized trial found no significant eight-week between-arm VO2max difference for low-volume HIIT versus heart-rate-defined continuous training, with a greater systolic-pressure decrease under continuous training. The continuous arm's within-group VO2max change was nonsignificant; percentage HRmax does not verify LT1 and programmes were not volume matched.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 6 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C7", "text": "Ten-week randomized HIIT and continuous-training interventions improved cardiopulmonary measurements in tobacco-dependent male students compared with nonexercise. The abstract does not establish measured threshold prescription or isolate the VO2max superiority contrast; tobacco-related subgroup results cannot be generalized to all adults.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 7 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C8", "text": "A 20-patient coronary rehabilitation trial reported larger estimated VO2max improvement in two HIIT arms than continuous training, while quality-of-life and walking comparisons were similar. VO2max was estimated rather than measured laboratory gas exchange; tiny arms and no verified LT1 or volume matching prevent a direct registered-superiority inference.", "carries_number": true, "load_bearing_for": [ "SC3" ], "source_ns": [ 8 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C9", "text": "Sixty overweight young women randomized to twelve-week HIIT, continuous training at 50% VO2max, or nontraining showed fitness improvements in both exercise arms with larger HIIT effect sizes. The continuous dose was defined by percentage VO2max rather than measured LT1; the report supports low-intensity training causation in this cohort but not registered exclusive-zone superiority.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 9 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C10", "text": "An 88-patient randomized isocaloric comparison found twelve-week VO2max increases of 15% under interval training and 5% under moderate continuous training, alongside blood-pressure improvement. The continuous prescription was about 60% VO2max, not individually verified below-VT1; blood pressure was primary and equal energy expenditure does not isolate the threshold boundary.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 10 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C11", "text": "The 81-man RUSH crossover study found larger VO2max gains with high-intensity than energy-comparable continuous running, while several cardiometabolic changes did not differ. The moderate prescription used percentage HRmax rather than individual LT1; this and PMID24738073 are reports of the same study, not independent causal lines.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 11 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C12", "text": "Twenty inactive young adults randomized to six-week HIIT or continuous training improved VO2max and peak power similarly, with enjoyment falling during unsupervised exercise. No nonexercise control or verified below-LT1 prescription is described; supervision and adherence can affect realized dose, and failure to find a difference does not prove equivalence.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 12 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C13", "text": "In a 34-person community pilot, eight-week continuous and two interval-training regimens increased VO2max, with less time commitment in the interval arms. Active comparator and small incomplete groups prevent no-training inference; percentage HRmax and unequal time do not test volume-matched below-LT1 superiority.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 13 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C14", "text": "A 54-person randomized trial found greater VO2max and metabolic-score improvements under personalized continuous-plus-interval and resistance training than standardized continuous training or nonexercise. The intervention combined intensity prescription, intervals and resistance work, so benefits cannot be attributed exclusively to below-VT1 exercise or individualized threshold targeting.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 14 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C15", "text": "The RUSH isocaloric sixteen-week trial found fitness and metabolic-score improvements under both intensity programmes compared with the sedentary phase. The moderate arm used percentage HRmax rather than LT1; PMID25580979 reports this same parent trial with additional outcomes, so apparent replications are grouped.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 15 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C16", "text": "Sixty-one overweight or obese young adults randomized to aquatic continuous training, intervals or control showed aerobic-capacity gains in both exercise arms and differing vascular or heart-rate responses. Heart-rate prescription and aquatic modality do not verify below-LT1 exposure; correlations between VO2max and vascular change are not mediation tests.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 16 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C17", "text": "The HERITAGE standardized twenty-week programme increased average absolute VO2max by approximately 400 mL/min, with wide within-cohort heterogeneity and familial resemblance. There was no randomized nonexercise contrast and training progressed to 75% VO2max, not exclusive below-LT1; low measured gains cannot define an outcome-based exclusion.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 17 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C18", "text": "HERITAGE and replication cohorts associated N-palmitoyl glutamine with fitness, training-associated increases and lower mortality, while cell experiments increased mitochondrial indices. Cell sufficiency and human associations do not establish endogenous human necessity or VO2max mediation of mortality; HERITAGE measurements overlap its other reports.", "carries_number": false, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 18 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C19", "text": "HERITAGE duplicate exercise measurements found increased stroke volume and oxygen extraction after standardized twenty-week training, with demographic variation. Exposure progressed from 55% to 75% VO2max without individual LT1 verification or nonexercise controls; central and peripheral adaptation undermine a unique mitochondrial-zone explanation.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 19 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C20", "text": "HERITAGE family analyses found familial resemblance in baseline ventilatory threshold and its twenty-week training response. Familial covariance contains shared environment and cannot serve as Mendelian randomization or independent causal proof; it uses the same training cohort.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 20 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C21", "text": "HERITAGE analysis found heart rate at a given percentage VO2max remained similar after training despite higher fitness and lower heart rate at fixed workload. This validates the study's relative-intensity adjustment, not individual LT1 placement; an attached erratum is flagged in the source record but its details and identifier were not supplied.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 21 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C22", "text": "A HERITAGE genome-wide analysis associated variants with VO2max trainability and reported selected associations replicated in STRRIDE, DREW and Black HERITAGE participants. Prediction of response is not an instrument for exercise exposure or fitness-mediated survival; discovery and partial replication do not constitute an isolated below-LT1 causal line.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 22 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C23", "text": "Human training transcriptomes and selectively bred rats identified regulatory networks associated with larger aerobic-capacity responses. Outcome-defined high and low responders do not create preregistered causal subtypes; transcriptomic covariance and selected-breed comparisons do not isolate below-LT1 training or human necessity.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 23 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C24", "text": "Pretraining muscle RNA signatures predicted heterogeneous VO2max gains in independent training datasets, with associated variants assessed in HERITAGE. Prediction and cross-validation are not causal perturbation or mortality mediation; shared discovery datasets with PMID20930125 and HERITAGE genotyping are not independent causal lines.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 24 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C25", "text": "A retrospective HERITAGE analysis found training intensity relative to measured VT associated with threshold-VO2 change but not maximal-VO2 change. Participants were not randomized below versus above VT, the programme progressed to 75% VO2max and lacked nonexercise controls; beginning below VT does not establish exclusive below-VT exposure.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 25 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C26", "text": "Duplicate submaximal exercise tests across HERITAGE centres showed generally good reproducibility for cardiovascular and metabolic measurements. Measurement reliability supports interpretation of observed changes but does not establish causal training effects or interchangeability of heart-rate zones and individual thresholds.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 26 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C27", "text": "In 122007 clinical treadmill patients, greater estimated exercise capacity was associated with lower subsequent all-cause mortality after risk adjustment. Fitness was estimated from treadmill performance rather than direct gas exchange, and referral selection, baseline illness and residual confounding prevent fitness-mediated causal survival inference.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 27 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C28", "text": "A proteomic fitness score developed across cohorts predicted mortality and multisystem disease and changed during a twenty-week exercise programme. A molecular score reflecting several biological traits does not isolate measured VO2max as a mortality mediator; training measurements overlap HERITAGE and prediction does not demonstrate intervention causation.", "carries_number": false, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 28 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C29", "text": "Among 1171 cardiac-rehabilitation completers, larger measured peak-VO2 improvements were associated with lower subsequent mortality after covariate adjustment. Change-response groups were defined after treatment and adherence, recovery, disease severity and selection could affect both fitness gain and survival; no mediator-specific intervention was performed.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 29 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C30", "text": "HERITAGE proteomic profiles predicted training-associated fitness changes and selected proteins also associated with mortality in another cohort. Shared participants and biomarker prediction do not isolate causal pathways or fitness-mediated mortality; attached erratum PMID34446928 requires interpretation separately from the original study count.", "carries_number": false, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 30 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C31", "text": "A 13423-person older-adult cohort associated better performance across fitness domains with lower subsequent mortality, including step-test capacity, strength and balance. Step tests are not measured VO2max and several correlated capacities may reflect health reserve; multivariable adjustment does not isolate a fitness-mediated mortality effect.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 31 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C32", "text": "After an equal-duration control period, four-week HIIT in 28 comorbid octogenarians increased anaerobic threshold, muscle mass and mitochondrial oxidative-phosphorylation measurements. The intervention was high intensity, nonrandomized and shorter than registered follow-up; parallel muscle and fitness changes do not establish necessity or below-LT1 specificity.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 32 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C33", "text": "Direct CPET in 502 healthy adults provided age-specific maximal and submaximal reference values and associated vigorous activity with higher fitness. Cross-sectional activity associations cannot substitute for randomized training; reference values depend on recruitment, modality and measurement rather than a universal wearable score.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 33 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C34", "text": "Directly measured peak-VO2 fitness in 2368 Finnish men was associated with lower long-term mortality across socioeconomic strata. Residual illness, behavioural and socioeconomic differences remain; baseline direct measurement strengthens prognosis but does not isolate intervention-induced VO2max as mediator.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 34 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C35", "text": "UK Biobank activity and estimated fitness jointly predicted cardiovascular events, while genetically proxied fitness showed a modest inverse association with heart-failure risk. Heart-failure incidence is not all-cause mortality or intervention-induced mediation; genetic instrument pleiotropy and estimated rather than direct fitness restrict causal interpretation.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 35 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C36", "text": "Genetic fitness instruments informed by exercise tests and resting heart rate supported lower type-2-diabetes risk with higher genetically predicted fitness. Lifelong genetically proxied fitness differs from a six-to-24-week training gain; diabetes risk and candidate proteomic mediators do not demonstrate fitness-mediated mortality.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 36 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C37", "text": "A Finnish cohort associated higher step-test fitness with lower healthcare costs, but its CRF Mendelian-randomization estimate was statistically null. Costs are not mortality; the null genetic estimate prevents treating all favourable fitness associations as independent convergent causal confirmation.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 37 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C38", "text": "Observational and bidirectional genetic analyses associated estimated cardiorespiratory fitness with lower COPD risk. Estimated bike-test fitness and COPD incidence do not establish intervention-induced measured-VO2max mortality mediation; selection and instrument assumptions remain relevant.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 38 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C39", "text": "Bidirectional genetic analysis favoured greater weight-scaled grip strength increasing weight-scaled fitness, with no detected reverse effect. Fitness is not a universal cause of all functional domains; common body-weight scaling and instrument assumptions complicate interpretation and mortality was not tested.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 39 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C40", "text": "UK Biobank fitness associations with selected cancers and genetic breast-cancer estimates weakened after adiposity adjustment. Cancer incidence is not mortality mediation; shared body-composition pathways and fitness scaling prevent an isolated VO2max mediator interpretation.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 40 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C41", "text": "UK Biobank estimated fitness predicted several age-related diseases, whereas MR support in the abstract was limited to Parkinson disease and small-vessel stroke. Observational results do not automatically become causal because some genetic contrasts are positive; these outcomes do not isolate intervention-induced VO2max and mortality.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 41 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C42", "text": "Bidirectional and multivariable MR found adiposity, lean mass and activity affected estimated VO2max, but genetically predicted VO2max showed no association with longevity or diabetes. Genetic nulls depend on power, scaling and exclusion restriction and do not prove exercise lacks health benefit; lifelong estimated fitness is not a controlled training-induced mortality mediator.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 42 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C43", "text": "Wearable-data models estimated fitness in large cohorts and tracked longitudinal change, with external direct-VO2max testing in 181 participants. Descriptive validation only: correlation and group prediction do not guarantee individual agreement, threshold placement or causal health benefit from changing a watch score.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 43 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C44", "text": "A small Garmin fenix 6 validation study met its prespecified VO2max agreement criteria but found poor oxygen-saturation concordance. Descriptive validation only: nineteen fitness participants and model-specific criteria do not validate all wearables, LT1 identification or clinical decision use.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 44 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C45", "text": "A standardized smartphone submaximal-exercise application closely predicted direct VO2max in 162 healthy volunteers under supervised test conditions. Descriptive validation only: a structured treadmill protocol is not passive wrist sensing and does not demonstrate intervention efficacy, mortality benefit or below-LT1 prescription accuracy.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 45 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C46", "text": "Clinical wearable ECG and accelerometer models predicted VO2max with moderate cross-validated correlation and roughly 3.35 mL/kg/min error, with linear regression performing best. Descriptive validation only: cross-validation in a specific dataset does not establish external transportability, individual treatment-change accuracy or causal intervention benefit.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 46 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C47", "text": "Pixel Watch 3 validation in 34 adults showed small mean VO2max bias but wide individual limits of agreement from about minus12.56 to plus11.50 mL/kg/min. Descriptive validation only: low average bias can conceal large individual errors; these estimates cannot substitute for measured thresholds or small laboratory fitness changes.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 47 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C48", "text": "Apple Watch Series7 validation in nineteen adults underestimated mean fitness versus cycle-ergometer gas exchange and showed 15.79% mean absolute percentage error and poor reliability. Descriptive validation only: cycling versus outdoor-running criterion differences and tiny sample restrict device conclusions; the result does not test whether exercise improves fitness.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 48 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C49", "text": "In 42 sedentary adults randomized to twelve-week threshold-based, heart-rate-reserve or nonexercise groups, both exercise programmes improved VO2max with larger increases under threshold-based prescription. The threshold regimen used VT1 and VT2 and is not shown by the abstract to remain below VT1; individualized mixed-zone success cannot establish below-LT1-exclusive efficacy or superiority.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 49 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph5, 1:Methods:paragraph6, 1:Methods:paragraph7, 1:Methods:paragraph9, 1:Methods:paragraph10, 1:Methods:paragraph11, 1:Methods:paragraph12, 2:Results:paragraph0, 2:Results:paragraph3, 2:Results:paragraph6, 2:Results:paragraph8. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C50", "text": "Thirty-nine untrained adults randomized to energy-matched low or moderate exercise or nontraining showed similar twelve-week VO2max gains in the exercise arms, while threshold-VO2 improvement favoured moderate training. The anaerobic-threshold definition was baseline lactate plus1.5mmol/L, not explicitly LT1; differential maximal-test effort and small groups constrain the strict below-first-threshold interpretation.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 50 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C51", "text": "Eight weeks of training approximately 72% of measured lactate threshold increased VO2max by7% in older adults and exceeded the nontraining-control change, with similar gains to higher-intensity training. Only nine low-intensity trainees and eight controls were reported; the abstract is publisher-truncated and does not detail threshold algorithm, control allocation or work matching, so replication and mechanism remain unresolved.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 51 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C52", "text": "A six-week randomized volume-controlled study found VO2max gains in all three exercise arms, with progressively greater increases at higher exercise intensities. The moderate arm used50%VO2reserve rather than individual LT1; this is a direct comparator challenge to blanket low-intensity superiority, not proof that every measured-threshold regimen is inferior.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 52 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C53", "text": "A secondary DREW randomized-dose analysis found lower proportions with no observed fitness gain at greater weekly exercise volume among sedentary postmenopausal women. The control arm was excluded from this report and50%VO2max was not a measuredLT1 prescription; response classification depends on measurement noise and cannot redefine baseline eligibility.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 53 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C54", "text": "Thirty recreational runners randomized to measured-threshold polarized or between-threshold distributions improved ten-kilometre race time, without a significant assigned-arm difference. Both groups included about20% high intensity; the positive achieved-distribution subset was post hoc and cannot replace intention-to-treat results or prove exclusive below-VT1 VO2max superiority.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 54 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C55", "text": "Twelve trained cyclists in a randomized crossover improved performance under both distributions, with greater selected gains after polarized training but no mitochondrial-enzyme increase. Polarized exposure included20% high intensity, total weekly duration differed, and mitochondrial-marker nulls restrict a uniform oxidative-capacity account; an attached erratum lacked supplied identifier or details.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 55 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C56", "text": "Fifty-five cancer survivors randomized to isocaloric planned-polarized or threshold training improved peakVO2 and measured first-threshold outcomes similarly, with less time in the threshold arm. The planned-polarized group actually trained pyramidal rather than as assigned; neither arm was exclusive belowLT1 and no nonexercise control was included.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 56 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C57", "text": "Nineteen moderately trained athletes randomized to HIIT with or without240additional weekly minutes of moderate-domain cycling had similar six-week performance and threshold changes. Small sample leaves added-benefit uncertainty and interventions were deliberately unequal-volume; incremental null does not refute stand-alone belowLT1 efficacy in sedentary adults.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 57 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C58", "text": "A fourteen-week randomized programme in48nonfrail octogenarians improved first-ventilatory-threshold oxygen uptake and workload versus control. Training occurred between thresholds and included intervals, while testing stopped before maximal exhaustion; submaximal improvement is not the registered belowVT1-only laboratoryVO2max endpoint.", "carries_number": true, "load_bearing_for": [ "SC2" ], "source_ns": [ 58 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C59", "text": "Sixteen trained cyclists completing randomized-order constant-load bouts had similar fat oxidation across roughly50-70%VO2max despite different heart rates and lactate. Acute fat oxidation does not establish chronic oxidative adaptation or unique maximal-fat-oxidation prescription benefit; Fatmax is not synonymous with measuredLT1.", "carries_number": true, "load_bearing_for": [ "SC1" ], "source_ns": [ 59 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C60", "text": "Eighty-four young adults randomized to five individualized intensity-domain programmes or nonexercise control showed no significant six-week moderate-domain VO2max or first-threshold improvement versus control, unlike all higher-intensity groups. Fourteen participants per group leave precision limits and the moderate arm's positive within-arm estimate is not a positive control-adjusted crossing; baseline and training dose differ from the older-adult positive study, so no age-specific interaction is isolated.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 60 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C61", "text": "The1567-person five-year Generation100 trial found no mortality difference for combined supervised training versus activity-guideline controls, with a nonsignificant lower-mortality HIIT trend and modest peakVO2 separation. Original Methods/Results confirm an active control, low observed event rate, imperfect adherence and substantial crossover; fitness itself was not manipulated separately, so this is a clinical-trajectory boundary rather than a mediator-specific refutation.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 61 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph3, 1:Methods:paragraph4, 1:Methods:paragraph5, 1:Methods:paragraph6, 1:Methods:paragraph9, 2:Results:paragraph6, 2:Results:paragraph17, 2:Results:paragraph18, 2:Results:paragraph19. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C62", "text": "Muscle biopsies in seven trained athletes versus seven sedentary participants showed greater carbohydrate-linked respiratory capacity and selected complex adaptations in the trained group. Cross-sectional trained status and tiny groups do not isolate training intensity causation, fatty-acid superiority or below-LT1 adaptation; an observational mechanistic comparison is not a randomized training trial.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 62 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C63", "text": "Eleven sedentary adults in an eight-week work-and-duration-matched crossover improved VO2max with continuous and interval exercise, while mitochondrial respiratory capacity increased only after intervals and capillary density more after continuous training. Continuous exposure was not verified belowLT1 in the abstract; correlations with performance do not establish mediator necessity, and the same participants in crossover periods do not constitute independent causal lines.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2", "SC3" ], "source_ns": [ 63 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC1", "text": "Aerobic training changes muscle, cardiac and molecular physiology, but the selected oxidative and transcriptomic experiments do not isolate an exclusive below-first-threshold stimulus as the mediator of functional adaptation. Muscle-only or blood-cell biomarkers retain the universal Γ ceiling for downstream functional inference.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 18, 19, 20, 23, 24, 28, 30, 32, 55, 59, 62, 63 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC2", "text": "Belman and Gaesser (PMID2072834) report a genuine measured-VO2max gain during eight-week training approximately 72% of their measured lactate threshold. The accessible abstract does not identify the first threshold or its algorithm, and control allocation is incompletely accessible. It therefore cannot verify the exact registered below-LT1 exposure. The modern randomized moderate-domain experiment (PMID38376995) is null against control. This supports mechanistic plausibility and a positive adjacent exposure, but no verified positive same-scope crossing or causal boundary for the registered claim.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 24, 25, 26, 32, 33, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 60, 63 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC3", "text": "No examined direct volume-matched comparison establishes exclusive below-LT1 training as superior for laboratory VO2max. Gormley's volume-controlled trial (PMID18580415) favoured higher intensity under percentage-reserve prescriptions. Polarized successes contain substantial intervals, and volume-matched cancer-survivor training (PMID40198065) showed no between-arm benefit. These are informative challenges but not proof of universal inferiority of every below-LT1 prescription.", "carries_number": false, "load_bearing_for": [ "SC3" ], "source_ns": [ 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 25, 49, 50, 51, 52, 54, 55, 56, 57, 60, 63 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC4", "text": "Higher measured or estimated fitness reproducibly predicts survival, but no examined experiment isolates an intervention-induced VO2max gain as the mortality mediator. Genetics offers complementary causal tests for related disease outcomes, while the direct longevity MR (PMID38864459) was null. Pure mortality associations cannot cross Β, and the null genetic test does not provide a positive threshold crossing.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 18, 27, 28, 29, 30, 31, 34, 35, 36, 37, 38, 39, 40, 41, 42, 61 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CH", "text": "Aerobic training improves fitness in many settings; evidence for an exclusive below-first-threshold prescription remains limited by exposure definitions and mixed results.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 51, 52, 42, 60 ], "verification": "verified", "verified_against": "Bounded synthesis of examined sources; score is adjudication.", "verified_on": "2026-10-13", "note": "" } ], "citation_ledger": [ { "n": 1, "citation": "Posner JD, Gorman KM, Windsor-Landsberg L et al. Low to moderate intensity endurance training in healthy older adults: physiological responses after four months. Journal of the American Geriatrics Society. 1992.", "tier": "A", "kind": "rct", "pmid": "1727835", "doi": "10.1111/j.1532-5415.1992.tb01820.x", "url": "https://pubmed.ncbi.nlm.nih.gov/1727835/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID1727835", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C1", "CSC2" ] }, { "n": 2, "citation": "Horváth J, Debreceni Nagy A, Fülöp P et al. Effectiveness of hospital-based low intensity and inspected aerobic training on functionality and cardiorespiratory fitness in unconditioned stroke patients: Importance of submaximal aerobic fitness markers. Medicine. 2022.", "tier": "A", "kind": "rct", "pmid": "36281113", "doi": "10.1097/MD.0000000000031035", "url": "https://pubmed.ncbi.nlm.nih.gov/36281113/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36281113", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C2", "CSC2" ] }, { "n": 3, "citation": "Brubaker PH, Moore JB, Stewart KP et al. Endurance exercise training in older patients with heart failure: results from a randomized, controlled, single-blind trial. 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BMJ (Clinical research ed.). 2020.", "tier": "A", "kind": "rct", "pmid": "33028588", "doi": "10.1136/bmj.m3485", "url": "https://pubmed.ncbi.nlm.nih.gov/33028588/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33028588", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph3, 1:Methods:paragraph4, 1:Methods:paragraph5, 1:Methods:paragraph6, 1:Methods:paragraph9, 2:Results:paragraph6, 2:Results:paragraph17, 2:Results:paragraph18, 2:Results:paragraph19. No complete-paper or supplement audit claimed.", "carries_claims": [ "C61", "CSC4" ] }, { "n": 62, "citation": "Daussin FN, Zoll J, Ponsot E et al. Training at high exercise intensity promotes qualitative adaptations of mitochondrial function in human skeletal muscle. Journal of applied physiology (Bethesda, Md. : 1985). 2008.", "tier": "A", "kind": "primary", "pmid": "18292295", "doi": "10.1152/japplphysiol.01135.2007", "url": "https://pubmed.ncbi.nlm.nih.gov/18292295/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18292295", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C62", "CSC1" ] }, { "n": 63, "citation": "Daussin FN, Zoll J, Dufour SP et al. Effect of interval versus continuous training on cardiorespiratory and mitochondrial functions: relationship to aerobic performance improvements in sedentary subjects. American journal of physiology. Regulatory, integrative and comparative physiology. 2008.", "tier": "A", "kind": "rct", "pmid": "18417645", "doi": "10.1152/ajpregu.00875.2007", "url": "https://pubmed.ncbi.nlm.nih.gov/18417645/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18417645", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C63", "CSC1", "CSC2", "CSC3" ] } ], "independence_basis": { "required": false, "lines": [], "shared_failure_mode_checked": true, "note": "No subclaim or tournament model is assigned Ζ or above. RUSH reports share one trial; HERITAGE reports share training observations; genetic papers often reuse the same UKBiobank fitness instrument. Clinical training allocation is one modality and repeated physiological measurements cannot establish independence merely by different laboratories or instruments." }, "gamma_hard_rules_considered": [ { "subclaim_id": "SC1", "rule_quoted": "ROS change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "NAD level change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "Mitochondrial metrics alone", "trigger_status": "Triggered for the inference from muscle or blood-cell energetic metrics to the claimed functional mechanism; no mediator dissociation establishes necessity." }, { "subclaim_id": "SC1", "rule_quoted": "Senescence marker changes alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "Single-species or single-strain evidence", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "Biomarker-only improvement without organismal benefit", "trigger_status": "Triggered for the offered oxidative-marker-only mechanism class; aerobic capacity and clinical survival remain separate endpoints." }, { "subclaim_id": "SC2", "rule_quoted": "ROS change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC2", "rule_quoted": "NAD level change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. 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The clinical exercise adaptation is explicit; no lifespan assertion is made." }, { "subclaim_id": "SC2", "rule_quoted": "Biomarker-only improvement without organismal benefit", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "ROS change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "NAD level change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "Mitochondrial metrics alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "Senescence marker changes alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "Single-species or single-strain evidence", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC3", "rule_quoted": "Biomarker-only improvement without organismal benefit", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "ROS change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "NAD level change measurements alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "Mitochondrial metrics alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "Senescence marker changes alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "Single-species or single-strain evidence", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC4", "rule_quoted": "Biomarker-only improvement without organismal benefit", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." } ], "consensus_validation": { "completed": true, "status": "completed_original_source_reconciliation", "provider_mode": "Authenticated Consensus Deep research connector; completed provider output retained privately; original-source access checked separately", "queries": [ "https://consensus.app/search/for-an-exhaustive-primary-literature-review-suppor/bntebXSBSPmGCOFMP0ugVw/" ], "query_record_note": "Exact provider question/response retained privately in its retrieval receipt.", "primary_comparison_count": 11, "primary_comparisons": [ { "pmid": "26146564", "doi": "10.1186/s13102-015-0011-z", "source_type": "primary study report", "study_group": "PMID26146564", "access_depth": "full_text_partial", "consensus_aspect": "Consensus describes individualized VT1/VT2 prescription as improving VO2max and reducing response variability.", "result_comparison": "The original randomized trial confirms greater fitness gain with individualized threshold prescription. Actual Methods specify weeks1-4 belowVT1, weeks5-8 betweenVT1 andVT2, and weeks9-12 aboveVT2. Selected Results use completer analyses and report the twelve-per-arm responder finding. Its total success therefore cannot establish exclusive belowVT1 exposure or universal response.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/26146564/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-48-54-10000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\body-presentation-receipts\\26146564-s1-p5-6-7-9-10-11-12.json", "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\body-presentation-receipts\\26146564-s2-p0-3-6-8.json" ] }, { "pmid": "42156172", "doi": "10.1136/bjsports-2025-111351", "source_type": "primary study report", "study_group": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus treats a joint activity-fitness cohort and genetic analysis as complementary causal evidence and cites its measurement-error limitations.", "result_comparison": "The original abstract confirms estimated fitness and activity associations plus a genetically proxied heart-failure result. It does not isolate direct measured VO2max or intervention-induced mortality mediation; heart-failure incidence is a different endpoint. Genetic evidence is considered on its assumptions rather than dismissed as simple association.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/42156172/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-36-45-10000.json" ], "body_receipts": [] }, { "pmid": "42163317", "doi": "10.1186/s12916-026-04854-4", "source_type": "primary study report", "study_group": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus describes observational and bidirectional genetic support for estimated fitness lowering COPD risk.", "result_comparison": "The original report agrees that fitness was assessed by heart-rate response to a submaximal cycle test and relates it to COPD risk. This supports a disease-specific causal-inference companion with instrument caveats, not the registered mortality-mediation claim or measured-threshold exercise exposure.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/42163317/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-36-45-10000.json" ], "body_receipts": [] }, { "pmid": "30646252", "doi": "10.1001/jamanetworkopen.2018.3605", "source_type": "primary study report", "study_group": "PMID30646252", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus cites Mandsager's treadmill cohort as strong prognostic fitness-mortality evidence.", "result_comparison": "The original confirms a large referred-patient retrospective cohort and inverse mortality association, but exposure is peak estimated metabolic equivalents rather than direct gas-exchange VO2max. Risk adjustment and sample size do not isolate a causal mediator; the prognostic claim remains valuable.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/30646252/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-27-36-10000.json" ], "body_receipts": [] }, { "pmid": "38864459", "doi": "10.1210/clinem/dgae393", "source_type": "primary study report", "study_group": "UKBiobank_fitness_genetic_instrument_reuse", "access_depth": "abstract_metadata", "consensus_aspect": "The observed Consensus headline calls fitness-mortality evidence only partly causal, while its selected reference list does not include the direct fitness-longevity MR null examined here.", "result_comparison": "The original bidirectional and multivariable MR reports no association for genetically predicted VO2max with longevity or diabetes, despite associations from activity, adiposity and lean mass to fitness. This omission is corrected in our evidence card. The null limits an isolated fitness mediator but does not prove exercise lacks health benefit.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/38864459/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-45-54-10000.json" ], "body_receipts": [] }, { "pmid": "2072834", "doi": "", "source_type": "primary study report", "study_group": "PMID2072834", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus relies on a 2026 systematic review pooling threshold-defined and proxy low-intensity studies for its main positive below-threshold statement.", "result_comparison": "The original eight-week older-adult comparison reports a positive measured-VO2max result below its study-defined LT. Its truncated abstract does not identify LT1 or the threshold algorithm, so this finding retains adjacent positive evidence without strict-scope causal crossing credit.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/2072834/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-48-54-10000.json" ], "body_receipts": [] }, { "pmid": "40198065", "doi": "10.1002/ejsc.12287", "source_type": "primary study report", "study_group": "PMID40198065", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus says superiority over intervals is not established and warns that actual prescriptions differ from nominal training labels.", "result_comparison": "The original randomized cancer-survivor trial illustrates this: the planned polarized arm actually achieved a pyramidal distribution; isocaloric groups had comparable VO2peak changes. We retain achieved-exposure uncertainty and do not claim a pure below-LT1 intervention or equivalence from nonsignificance.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/40198065/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-54-60-10000.json" ], "body_receipts": [] }, { "pmid": "42743109", "doi": "10.1371/journal.pone.0356808", "source_type": "primary study report", "study_group": "PMID42743109", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus describes wearable fitness estimates as insufficiently reliable for individual clinical adjudication.", "result_comparison": "The original Pixel Watch3 validation gives an instructive distinction: mean VO2max bias was small, but individual limits of agreement were about minus12.56 to plus11.50mL/kg/min. Device accuracy remains descriptive validation and does not contribute a positive causal threshold crossing.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/42743109/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-45-54-10000.json" ], "body_receipts": [] }, { "pmid": "23752040", "doi": "10.1123/ijspp.2012-0350", "source_type": "primary study report", "study_group": "PMID23752040", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus notes polarized training can improve endurance performance but its low-intensity component is not isolated.", "result_comparison": "The original randomized recreational-runner contrast had a nonsignificant assigned-arm race-time difference despite improvement in both arms. The stronger achieved-distribution subgroup was selected after assignment and cannot define a preregistered beneficiary population or establish exclusive below-VT1 efficacy.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/23752040/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-48-54-10000.json" ], "body_receipts": [] }, { "pmid": "38376995", "doi": "10.1249/MSS.0000000000003406", "source_type": "primary study report", "study_group": "PMID38376995", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus identifies a contemporary domain-based randomized trial whose moderate-intensity arm did not improve VO2max versus control.", "result_comparison": "The original abstract confirms84 young adults,14pergroup,6weeks and work matching except sprint training. The moderate-domain change was1.8±2.7 versus0.1±1.2mL/kg/min in controls, without a significant between-arm result; higher domains were positive. This primary omission was corrected and limits a universal claim, while different age and dose from the1991positive and unverified historical LT1 prevent an isolated age interaction or verified causal context boundary.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/38376995/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-59-63-10000.json" ], "body_receipts": [] }, { "pmid": "33028588", "doi": "10.1136/bmj.m3485", "source_type": "primary study report", "study_group": "PMID33028588", "access_depth": "full_text_partial", "consensus_aspect": "Consensus describes Generation100 as a largely null randomized mortality trial affected by contamination and crossover.", "result_comparison": "Selected original Methods/Results confirm the combined supervised-training mortality null against an active guideline comparator, modest peakVO2 differences, low observed event rate and crossover. Because41%failed VO2max criteria, investigators correctly reported peakVO2. This tests broad training outcomes, not an isolated fitness-mediated survival mechanism.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/33028588/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\examinations\\original-59-63-10000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\body-presentation-receipts\\33028588-s1-p3-4-5-6-9.json", "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\body-presentation-receipts\\33028588-s2-p6-17-18-19.json" ] } ], "grade_changed": false, "grade_change_note": "Source-based adjudication; no independent blinded regrade claimed.", "raw_receipts": [ { "path": "deliverables\\hsef_v53_traffic_ranks_06_10_2026-10-13\\zone2-cardiorespiratory-fitness\\consensus-provider-checkpoint-1551-private.json", "sha256": "0347679f67ebc8a9573ce208fd73e8a5c42c7c98e2339985a2c4166c7cac8f40" } ], "independent_blinded_audit": false, "cutoff": "2026-10-13", "completed_utc": "2026-10-13T16:38:31.920130+00:00", "conclusion": "Endpoint hierarchy, experimental scope and original-source limits determine the evidence cards; provider wording does not override them." } }