Power through with this fun 45-minute, super-tough HIIT workout from Raneir Pollard. Challenge yourself with push ups, squat jumps, and more.

The bike incorporates two maximum effort, 20-second sprints which is then separated by low intensity cycling, says White. “The sprints push your muscles to quickly use up their glycogen stores which ...

This 13-minute stationary bike and upper body strength training routine from Barry's is a low-impact, full-body HIIT workout to burn calories and build muscle.

Les Mills Sprint applies HIIT principles to spinning for days when you're riding solo. Try this simple 15-minute workout you can do at the gym.