That’s one of the questions  Peter Attia MD explores in Outlive: The Science and Art of Longevity.

The answer is a technical one: Peak aerobic cardiorespiratory fitness, measured in terms of VO2 max.

So what exactly is VO2 max? It is the maximum rate at which we can utilize oxygen. The more oxygen our bodies are able to use, the higher our VO2 max.

And how is VO2 max … continue reading