A new expert breakdown ranks the top workouts for sustainable fat loss — and the winning routine might surprise you.

High-intensity interval training (a.k.a., HIIT) is a triple threat: “It’s quick, easy, and effective,” says Angela Gargano, a certified trainer and creator of Strong Feels Good & Pull-up Revolution.

High intensity interval training packs a hard workout into a short period of time, which makes it sound like it should be an efficient, superior way to work out. But HIIT doesn’t have as many ...

High-intensity interval training (HIIT) is as popular as ever. Join the trend with these tips on what to wear, how to warm up, and more. No doubt you’ve heard the buzz about high-intensity interval ...