HIIT workouts, or high-intensity interval training, are one of the best ways to exercise at home — no extra equipment necessary.

HIIT workout founded by a Japanese Olympic coach that uses periods of intense exercise and rest to burn calories.

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, ...

Like other HIIT workouts, the Norwegian 4x4 consists of brief spurts of high-intensity exercise interspersed with active ...

This month we will be alternating between HIIT walks and a simple HIIT routine that uses just your bodyweight to get your heart rate up. On days when we’re doing walking workouts, you have three ...

In TODAY.com's Expert Tip of the Day, a trainer explains how incorporating HIIT into a weekly workout routine can boost one's ...

Participation in once-popular HIIT workouts is flagging. But experts say it’s still one of the best types of exercise you can ...

We all grow older. There is nothing we can do about that, but the quality of those years is within our control, as recent ...

That HIIT workout routine is upping your cortisol (stress) levels. The head of research at Les Mills wants you to keep it under 40 minutes per week. “Cortisol is not particularly a ‘bad’ hormone, it’s ...

Looking for a workout that has speed, strength, and power wrapped into one? Try high-intensity interval training (HIIT), a method that packs a punch in a shorter amount of time compared to other ...

Many high achievers push too hard, leading to burnout. Dr. Vassily Eliopoulos explains that excessive stress from intense ...