Quick answer
VO₂ max: definition
VO₂ max is the maximum rate at which your body can take in and use oxygen during intense exercise — a key measure of cardiorespiratory fitness.
VO₂ max, explained
It's measured in a lab with a breathing mask or estimated by wearables and field tests. Higher cardiorespiratory fitness is strongly associated with lower mortality.
Why it matters
VO₂ max is one of the most powerful measurable predictors of healthy longevity.
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VO₂ max FAQs
What is VO₂ max?
Why does VO₂ max matter?
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