These workouts from Woods will teach your bod to fire on all cylinders. On the effort scale of 1 to 10, 10 is your all out ...

Losing weight and gaining muscle are two major feats in and of themselves, but if your goal is to achieve both at the same ...

Sprints can be completed for just a few seconds to a couple of minutes. The key with interval running is to get your heart rate towards 90% of your maximum during the “intense” part to get the most ...

Hill sprints are an excellent way to boost cardiovascular health. The high-intensity nature of this workout increases heart ...

As HIIT's popularity soars, sprint interval training, or SIT, is doing its best to catch up. Can shorter, harder, faster deliver better results? As the popularity of HIIT continues to soar, sprint ...

The hallmark of HIIT is repeated bouts of extremely hard work interspersed with periods of recovery. During your work intervals, you’ll be pushing yourself nearly to your max, Noam Tamir, CSCS, ...

No time to work up a sweat? Try Kristen Bell's go-to workout that only takes a few minutes of your day. “I don’t have an hour and a half—I have 25 minutes, max. I sprint up my driveway, walk back, ...

Tabata workouts are short, intense exercises that require pushing yourself to the limit. Here's how to do Tabata-style exercises at any fitness level.

Like the name suggests, HIIT training involves intense, max-effort movements followed by short rest periods. Those quick ...