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

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

Perfect for all fitness levels — this 20-minute HIIT workout combines power and endurance to sculpt your body fast!

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

Let’s be honest: Weight loss is hard. This is true for everyone, but it’s especially true for women, who typically have more body fat and less muscle mass than men. As a result, we burn fewer calories ...

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

High-intensity interval training involves performing an all-out, exhaustive physical effort for a short time followed by a short (sometimes active) recovery. Its benefits are clear: Effective HIIT ...

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

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

Welcome to Start TODAY. Sign up for our Start TODAY newsletter to receive daily inspiration sent to your inbox — and join us on Instagram! The American Heart Association recommends that adults get "at ...

Interval running condenses the powerful effects of regular running into shorter, high-intensity bursts. Research shows it can ...