That's why we tapped Gerren Liles, NASM, to lead the Ultimate HIIT program. He's purpose-driven to lead you to the best sweat of your life with these hard-hitting, 15-minute workouts. The HIIT ...

That's why we tapped Gerren Liles, NASM, to lead the Ultimate HIIT program. He's purpose-driven to lead you to the best sweat of your life with these hard-hitting, 15-minute workouts. The HIIT ...

When you focus on your core, it brings an extra layer of intensity to your fitness routine. Whether you're new to working out ...

YOU KNOW YOU need muscle... and you need to burn calories. Everyone needs more strength, too—and we can all use a little more ...

One study that compared a 30 minute HIIT, weightlifting and cardio session found that those who took part in HIIT actually burned 25%-30% more calories. For this workout you've got 10 different ...

But just because we're busy, it doesn't mean we can't burn some serious calories. The secret? High intensity interval training (HIIT), which ... a speedy 10-minute home workout that can help ...

Start getting stronger and sweat smarter with this fast-paced lower body bodyweight workout ... s Health+ Ultimate HIIT Challenge. In just 20 minutes, you'll burn a ton of calories, boost your ...

"It's the best bang for your buck," says Jacqueline Kasen, WH+ Ultimate HIIT Challenge trainer and founder of Kasen Fitness ... Thirty minutes of HIIT burns 25 to 30 percent more calories compared ...