As for how to measure your VO2 max, it can be hard to get an accurate reading. “The most accurate way to measure VO2 max is in a lab, on a treadmill or bike, wearing a mask that captures how much oxygen you are using,” says Ollis. “It is precise, but not very accessible. Most people rely on estimates from devices like Garmin, Apple Watch, Oura or Whoop. These are not perfect, but they are good enough to show direction and change over time.”
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