Aerobic exercise

Fitness, physical function, blood pressure and cognition answer different questions. The reviewed research also distinguishes exercise interventions from cohorts that track fitness and mortality.

A change in a laboratory marker, a test score and everyday function are different outcomes. A statistically detectable result does not by itself tell us whether someone would notice a worthwhile difference.

Check the measured endpoint, comparison and study population. The full profile preserves effect estimates and the source's clinical-significance assessment, including when that assessment is not supplied.

The claim to test: Improving fitness proves that a particular exercise program extends life.

What the reviewed records say:

The gap: Some pooled reviews combine exercise modes. Fitness–mortality associations do not isolate the causal effect of aerobic training.

Durability, effects in other populations and healthy-lifespan outcomes need their own evidence.

Independent replication, meaningful human outcomes, longer follow-up and better safety reporting would make these results easier to interpret.

Some pooled reviews combine exercise modes. Fitness–mortality associations do not isolate the causal effect of aerobic training.