HIIT WORKOUTS DEMAND that you give your all. You might find that you have a hard time pushing to your limits on your own—so you'll get closer to achieving your goals when you have a world class coach ...

Finish the Women's Health+ Ultimate HIIT Challenge strong with this 20-minute upper body bodyweight workout. Today's program uses fast-paced lateral exercises to strengthen and your arms ...

I ditched cardio for HIIT workouts for 30 days. The shocking results transformed my fitness, energy, and body. Discover all ...

Gliding knee tucks strengthens your upper body, defines your abs, improves posture, lowers back pain and enhances overall ...

an Upper/Lower Burner that hits key muscle groups in your upper body and lower body; a Squats and Overhead Work day to hammer home pushing movements; and a Total-Body Blast session that combines ...

VO2 max is a measure of your body’s efficiency in delivering oxygen and nutrients to tissues, including your brain, explains ...

The HIIT classes are usually group endeavors, but the gym offers semi-private and private lessons as well. Each day’s workouts target a specific area of the body, for example lower or upper body.