Generally speaking, though, this VO2 max chart notes where optimal scores should fall depending on your age: Your cardio fitness level isn't the only thing that plays a role. There are actually a ...

With a fitness tracker, you’ll have access to a variety of these health metrics—but there’s one that is key to determining your cardiovascular fitness that you may be ignoring: your VO2 max.

VO2 max is among the most elusive terms in fitness. You may have heard of it, as it’s often heralded as the number that ...