RUNNING TO THE best of your ability is something of a numbers game. To hit new PRs, you’ll want to keep tabs on all kinds of stats, like distance covered, pace per mile (or interval), max heart rate, ...

Zone 2 cardio workouts have gotten a lot of love lately. The second least-intense type of cardio on a scale of 1 to 5, zone 2 involves raising your heart rate only a bit—to 60 or 70% of your max. It ...

A routine sweat sesh can offer a whole slew of health benefits, but if you really want to capitalize on those workouts, going hard (think: sprinting, HIIT, intervals) may be your best bet. At least, ...

On TikTok, VO2 max is going viral as the key to improving your endurance during a workout. In short, you can think of this metric as the maximum amount of oxygen your body uses during exercise – V ...

New research shows the 4x4 workout format can improve fitness faster than traditional workouts, such as jogging or cycling ...