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

Get in a quick sweat with this full-body Tabata workout, care of Tara Nicolas. It takes just 8 minutes—including a warmup and finisher. Tabata is one of those amazing-yet-awful workout modalities.

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

It’s easy to pass four minutes of your time doing absolutely nothing. You can look at the clouds, ponder the meaning of life, count your freckles, let your mind wander. Those are all fantastic uses of ...

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 ...

The sun is out, temps are soaring, and carefree summer vibes abound. Why not channel that energy into your workout routine? This five-day break-a-sweat workout challenge, courtesy of Class Fitsugar, ...

Try this knee-friendly 35-minute workout, requiring no equipment, designed to burn calories and build strength safely.