If you want to slim down and your current routine's just not cutting it, this walk-jog-sprint workout may be your answer.

If you have a half marathon or marathon on the horizon, or even a 10K, it might seem counterintuitive to go out and train your body to run 100 meters as fast as you can. But even if you’re gearing up ...

For those who live to sweat — but maybe want a chance to fully catch their breath — SIT is the new HIIT. HIIT, or high-intensity interval training, includes bursts (typically 30 seconds to a few ...

HIIT, or high-intensity interval training, is increasingly popular, and it provides plenty of benefits, from torching calories to increasing your VO2 max and overall athletic performance. SIT, or ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Losing weight and gaining muscle are two major feats in and of themselves, but if your goal is to achieve ...

This is a challenging calisthenics/run workout with active rest in the form of pushups. Do this as a fast 100-meter run (near ...

No longer can some military personnel rely solely on running at a moderate pace. Sprinting and agility are regularly tested as part of the ever-evolving fitness tests in the military. Many fitness ...

A retired Navy SEAL said he stays strong and healthy with exercises to build muscle and boost longevity even when he's ...