Leg day doesn't have to last a long time — just ask ACE-certified personal trainer and Under Armour trainer Ariel Belgrave, who created this 20-minute lower-body HIIT workout. The session is part of ...

If you’re hunting for an efficient, effective and equipment-free workout you can do at home, you’re in luck. This workout contains 15 exercises, and you’ll do each one for 40 seconds followed by a ...

Combine ABS and HIIT cardio for the ultimate quick burn! In just 20 minutes, work on your abdominal muscles while increasing ...

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 ...

Sometimes it’s best to keep it simple with your workouts, because if you can just find the motivation to move for 20 minutes on any given day, you’ll be helping to improve your physical fitness and ...

Need a break from burpees, jump squats, and mountain climbers? This 20-minute HIIT boxing workout is a novel way to raise your BPMs. “Today, I’m going to be bringing you guys a 20-minute, HIIT ...

Workout trends come and go, but when it comes to the biggest bang for your buck, high intensity interval training, or HIIT, has staying power. HIIT’s specific origins are uncertain; some say it dates ...

"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 ...

Join yoga instructor Sophie Jaffe for a 20-minute HIIT Vinyasa class that will add an extra cardio element to your yoga practice. In this routine, you'll start with a gentle Vinyasa flow to warm ...

If you’re looking to add some kick to your workout and save time while doing it, it’s probably time to try a 15-minute HIIT workout. “HIIT, or high-intensity interval training, essentially means you ...