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.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Want an exercise program that helps you work out smarter, not harder? You've found it. The Women's ...

Get ready to work out with fitness trainer Natalie White, who will be leading this 10-minute HIIT and strength workout joined by Dustin Ripkens and Luisa Fonseca. In this routine, you'll power through ...

Presented by Athleta, this HIIT workout is basically a guaranteed confidence boost. Celebrity trainer Amanda Butler leads you through two different rounds of full-body interval training, helping you ...

Since HIIT workouts can get the job done in just 15 to 20 minutes, on average, they seem like the perfect way to exercise whenever you’re in the mood for a short but sweet round of cardio. So many ...

We've all been there: obsessed with one specific workout, whether it's a so-hard-it-hurts HIIT class, a makes-your-bod-rock ...

HIIT workouts are meant to be fast and furious. They rely on explosive exercises like burpees, high knees, kettlebell swings, sprints, and other moves that spike your heart rate and make you sweat — ...

For many people aiming to burn a lot of calories, high-intensity interval training is the way to go. Also known as HIIT, these popular workouts feature bursts of intense activity, such as squats or ...

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a cardio boost to what would otherwise be a serviceable, but ...

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a calorie-burning cardio boost to what would otherwise be a ...

Hedy Phillips is a freelance lifestyle writer based in New York. While she's not writing on topics like living on a budget and tips for city dwelling, she can usually be found at a concert or ...