Experts share the best types of interval training to help you improve both as a long-distance runner and an all-around athlete.

Anaerobic exercise is similar to aerobic exercise but uses a different form of energy — quickly and immediately. Anaerobic exercises include high-intensity interval training (HIIT), weight lifting, ...

Aerobic exercise is cardiovascular conditioning that strengthens both your heart and lungs. The word “aerobic” means “with oxygen,” as this kind of exercise is fueled by the oxygen that you get from ...

Runners, you've gotta lift. And lifters, sets of 10 do not count as cardio.