VO2 max measures the maximum amount of oxygen your body can use during exercise. It’s become one of the buzziest fitness metrics on social media, with influencers and wearable devices touting it as a key indicator of cardiovascular fitness and even long-term health.
But what does your VO2 max actually tell you? While it can provide useful insight into your aerobic fitness, it’s not the only measure of your overall health. And, most people don’t need to obsess over improving or tracking it.
What Does VO2 Max Measure?
VO2 max reflects how well your heart and lungs deliver oxygen to your muscles and how efficiently your muscles use it to produce energy.
You may see VO2 max written as the amount of oxygen your body uses per kilogram of body weight each minute (mL/kg/min). In general, a higher VO2 max means your body uses oxygen more efficiently during a workout, and that ability reflects cardiorespiratory fitness and muscle function.
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