Maybe your smartwatch has been telling you your VO2 max for a while now, but you’re not sure how accurate it is. Or maybe you’ve recently been targeted by social media ads for fancy running labs ...

If it seems like everyone in your run club is talking about VO2 max these days, we wouldn’t be surprised. This metric—which is essentially a measure of your cardio fitness—is a zeitgeisty topic, ...

While heart health and overall longevity is often linked with lipid profiles and metabolic capacity, one ultimate measure takes a silent shot. Emerging studies and health experts are paying closer ...