The Workout: Perform each exercise for 45 seconds, completing as many reps as possible, with no rest between moves. Rest one minute after finishing the circuit, then repeat one more time.

In one of Grossman’s studies, older women who used a 10-minute HIIT workout three to five times a week for 16 weeksincreased muscle about 2.23 times faster than women doing long aerobic workouts.

Challenge your core and cardio skills with this 10-minute HIIT workout led by fitness trainer Natalie White. She's joined by class members Luisa Fonseca and Madisyn Maniff for this high-energy ...

This 10-minute bodyweight HIIT workout with trainer Natalie White can be modified no matter your level, from beginner to advanced.

These 10-minute HIIT workout videos offer fast and effective exercises that don't require any equipment.

10-min HIIT workout for beginners High Intensity Interval Training is a beast of a workout! It's challenging, it's fun and well, it roasts you to the core. Buckle up, guys!

According to studies and a personal trainer, 10 minute HIIT workouts that are done 3 times a day are just as effective as a 1-hour jog.

This 10-move HIIT sequence gives you a full metabolic workout in just under 10 minutes.

The 10-Minute HIIT Ab Workout Equipment needed: A mat or soft surface, like a carpet. Directions: Do each exercise for 30 seconds, and take 15 seconds of rest between each move.

High-intensity interval training, aka HIIT, is one of the best ways to maximize your workout time. Burn a ton of calories and boost your metabolism in little time with celeb trainer Astrid McGuire ...

There’s no excuse not to try this effective, 10-minute, HIIT, total body circuit.