"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." High-intensity interval training (otherwise known as HIIT) may sound, well, intense. And it can be. But ...

Torch your muffin top with 9 expert-backed HIIT moves that burn fat, boost metabolism, and sculpt your waist in 15 minutes.

Forget hours running on the treadmill or the elliptical machine at the gym — if you’re short on time and looking for a way to torch calories, you’re better off doing a quick HIIT workout. You don’t ...

High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts are so efficient because they alternate short bursts of very intense ...

For some people trying to lose weight, they might find that they've plateaued and wonder if there is anything they can add to their workout routine to jumpstart their metabolism. Enjoying a ...

"Plan for one upper-body, one lower-body and one full-body strength session per week, lasting 35 to 45 minutes each. Any more ...

You can always rely on a high-intensity workout to leave you feeling sweaty and exhausted. But a longer workout isn't necessarily better. And a new approach that's gaining fans on social media only ...