Derivation Web

source_41d85003f90e4223

**Selected angle:** `source`

## One-sentence thesis

Across 5 independently cited sources, the evidence converges on one bounded claim: exercise training reduces the risk of mortality. Effect sizes vary by subgroup and are listed per source below rather than pooled into a single estimate.


**Interpretation note:** This is a hypothesis-generating alpha memo, not confirmatory evidence; subgroup or…