{
  "title": "What this review means",
  "includeSubclaimIllustrations": false,
  "redteamReviewed": true,
  "accessNotice": "Source checking used bounded original primary abstract passages/status records and selected original partial-body passages. No complete-abstract or complete-paper audit, or independent scientific peer review, is claimed. Detailed access counts and limitations appear in the review.",
  "overview": "Aerobic training improves fitness in many settings; evidence for an exclusive below-first-threshold prescription remains limited by exposure definitions and mixed results.",
  "implications": "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.",
  "limitations": "63 primary reports with 2 selected partial-body examinations; density, heterogeneous controls and incomplete access set the confidence, not correctness. The grade applies to the exact registered claim; stronger findings for narrower subclaims remain separate. No complete-paper audit or blinded calibration is claimed. This educational review does not establish an individual treatment recommendation."
}