The relationship between V02max—your maximum rate of oxygen consumption during physical exertion, adjusted for your weight—and almost all aspects of health, fitness, and longevity are now well understood. It is, in a word, crucial. And we are reasonably good at prescribing exercise "doses" targeting improving your own measure, But what is well understood is how it can all get muddled by outside factors, like air quality. We dive into it all in this episode, trying to help you understand this important (and simple) measure that sometimes goes all ... weird.

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