How Powerful is Your Engine? A Look at VO2max

A board certified internal medicine physician talks about why your relative VO2max may be the most important vital sign of all. It is the one number that gives you the most accurate picture of well your heart and lungs are working to power your muscles to perform work. It can also tell us when an individual can no longer move enough to live independently- the so-called "frailty threshold". Increasing your VO2max now with regular aerobic exercise may prevent you from ever crossing that threshold later in life.

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Seriously undervalued channel. Best VO2 max explanation I've seen thus far. And this includes the Huberman podcasts.