These brief, intense workouts can strengthen your heart and boost longevity.

Add Yahoo as a preferred source to see more of our stories on Google. VO2 max testing requires a mask to measure oxygen intake and carbon dioxide output to determine your cardiovascular fitness.

VO2 max is often referred to as a key marker of fitness. It’s the measure of the maximal amount of oxygen your cells can take ...

This key metric reflects how much oxygen your body uses during a workout. But it isn’t just for athletes—your VO2 max is a critical indicator for your future health and longevity. Understanding your ...

Hardcore endurance athletes have tracked the metric for decades, but it is increasingly touted as a measure of fitness and health for the average person.

The Apple Watch’s Cardio Fitness measurement is a more user-friendly term for VO2 max, a universally recognized and established fitness metric that measures how much oxygen your body can transport to ...