Kickstart your metabolism and burn more calories all day with this simple morning routine. Find out how to maximize your energy from the moment you wake up.

Discover how Dance HIIT workouts combine fun choreography with high-intensity intervals to maximize calorie burn, boost ...

HIIT recovery periods can be active ... or reduce the duration of rest periods in subsequent workouts. Here’s a progression of the program above: ...

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 ...

and Jacqueline Kasen to lead the Ultimate HIIT program. These trainers are purpose-driven to lead you to the best sweat of your life with their hard-hitting, 20-minute workouts. The HIIT protocol ...

Today we're going to do a High-Intensity Interval Training workout, or HIIT, H-I-I-T ... once or twice a week to change up your regular routine on some days. Now, this workout is so intense ...

At 68, Orangetheory founder Ellen Latham has bounced back from two knee replacements and isn't slowing down, thanks to ...

Ditch the gym and break a sweat from the comfort of your home with these top YouTube fitness channels -- expert-approved and packed with everything from low-impact Pilates to intense HIIT sessions.

Father-to-be Sidharth Malhotra's fitness routine is a perfect blend of weight training, cardio exercises, and flexibility ...

Originally often catered to super athletes or those looking to become them, "a few years ago, CrossFit rebranded and incorporated a more sensible approach to fitness for a broader range of people," ...

He says the program incorporates elements of weightlifting, plyometrics, aerobic exercise, gymnastics, high-intensity interval training (HIIT), kettlebell drills, calisthenics and strongman exercises.