Instructions: Choose up to five of the exercises below. Complete the indicated number of reps for each, then rest for 30 ...

In a small study, sprint interval exercise helped to “clean-up and rebuild” cells better than steady-state moderate-intensity cardio. Experts say it doesn't take a lot to benefit from this effect—even ...

How training affects cells is determined not only by whether we move at all, but also by how intensely and for how long we do ...

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

If you’re short on space for a home gym, the right equipment can still keep you on track. Consider our favorite space‑saving ...

The issue: Many runners (particularly women) report that their fitness trackers tell them they’re exercising in a higher zone ...

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

There can get a point where you’re climbing mountains, navigating rough terrain, or carving fresh pow and feeling good —but ...

Zone 2 is a buzz word among runners these days. But, what the heck does that even mean? In the simplest terms, your heart ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." In a small study, sprint interval exercise helped to “clean-up and rebuild” cells better than ...

If you are preparing for military service that involves intense physical training, you will want to be a cardio machine. Here are three standard methods of movement in the military: running, rucking ...