Key finding
Highest vs lowest activity roughly 25–35% lower mortality in major prospective meta-analyses
Evidence & causal status
Strong
Mostly association; causal support substantial but mortality RCT evidence limited
Caveats & limitations
Reliability / bias notes: Reverse causation; questionnaire error; healthy-user bias
This describes a population-level association from published research. It is not a prediction about any one individual, and association is not the same as causation unless stated otherwise above.