What is VO2 max and why is it a longevity biomarker?
VO2 max is the maximum rate of oxygen utilization during intense exercise and is one of the strongest single predictors of all-cause mortality. Each cardiorespiratory fitness tier higher is associated with materially lower mortality risk. It is trainable at every age.
Full answer
VO2 max measures the maximum rate of oxygen utilization during peak exercise and is one of the most robust single predictors of all-cause mortality in adults. Large longitudinal cohorts have repeatedly shown that moving from the lowest cardiorespiratory fitness quintile to higher quintiles is associated with materially reduced mortality risk — an effect size comparable to or larger than most pharmacologic interventions. VO2 max is trainable at every age. The drivers are sustained zone-2 aerobic volume (the cardiac stroke volume adaptation) layered with periodic VO2-max intervals (the peripheral oxygen-extraction adaptation). Hormonal status, anemia, thyroid function, and metabolic context all influence trainability — which is why longevity-oriented members commonly read VO2 max alongside the standardized biomarker panel.
Educational. Not a substitute for individualized provider review.
- Longevity intelligence — Primary source · oMeds
- Reviewed by Dr. Laura Purdy, MD, MBA · Clinical Director, oMeds · Last reviewed 2026-05-29