Protocol
VO2 max · VO2max testing · CPET · cardiopulmonary exercise testing · cardiorespiratory fitness testing · maximal oxygen uptake · exercise treadmill testing with gas exchange
Cardiorespiratory fitness is among the most robustly evidenced predictors of all-cause mortality in humans. A retrospective cohort of 122,007 adults undergoing exercise treadmill testing at the Cleveland Clinic (JAMA Network Open, 2018, median follow-up 8.4 years) found an inverse, graded relationship between fitness and mortality, with elite performers at an adjusted hazard ratio of 0.20 versus low performers and no observed upper limit of benefit. The 2016 American Heart Association scientific statement concluded that low CRF is associated with high cardiovascular and all-cause mortality risk, is potentially a stronger predictor than smoking, hypertension, dyslipidaemia or type 2 diabetes, and significantly improves risk reclassification. What this does NOT show: the evidence establishes fitness as a modifiable exposure and a prognostic marker, not that the act of measuring VO2max changes outcomes. There is no trial demonstrating that VO2max testing itself extends lifespan or healthspan; the causal arm of the evidence rests on exercise training trials, and no RCT randomises people to being tested. Clinic-quoted effect sizes (for example Everlab's "for every 10-point increase in VO2 Max, there is a 17 per cent lower risk of death from cancer and an 11 percent reduction in overall mortality") are observational associations presented without a cited source and should not be read as causal. VO2max is also effort-dependent and protocol-dependent, so values are not directly comparable across providers, and estimated (submaximal or wearable-derived) VO2max is a weaker measure than a true maximal test with gas exchange.
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What it is
VO2max is the maximum rate at which the body can take up and use oxygen during progressively harder exercise, measured directly by breath-by-breath gas analysis during an incremental treadmill or cycle test taken to exhaustion. It is the standard quantitative measure of cardiorespiratory fitness and is used in longevity practice as a prognostic marker and as a baseline for prescribing training. Clinics position it as a predictor of long-term mortality risk and a way to track whether an exercise programme is working.
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Every entity profile on variis is sourced. Not medical advice.