# VO2 max

VO2 max is the maximum rate at which your body can use oxygen during hard exercise, in ml per kg per minute.

It is a strong marker of aerobic fitness. Lab tests measure it; field tests (Cooper 12-minute run) and heart rate ratios estimate it. Regular aerobic training raises it.

Also called: VO2max, Maximal oxygen uptake.

Related: [Zone 2](https://revns.com/dictionary/zone-2.md), [Resting heart rate](https://revns.com/dictionary/resting-heart-rate.md)

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