For fitness enthusiasts who need a little cardio variety, HIIT (or high-intensity interval training) has long been a popular ...

Another study led by the University of Macau found that participants who performed 20-minute HIIT workouts 4 days a week for 5 weeks improved their oxygen consumption by 9%. Why is a HIIT workout ...

This 4-minute routine is designed to push your heart rate up, engage multiple muscle groups, and maximize fat loss. Unlike ...

The workout, devised by The Body Coach app founder, Joe Wicks, is a 28-minute HIIT workout that uses a set of dumbbells.

If you hate running, the good news is it’s not the only way to burn calories and build muscle — HIIT training is a great alternative, especially if you’re short on time. In fact, you’re ...

You don’t need the gym – build boulder shoulders with this dumbbell-only workout ...

Keep scrolling for 21 great high-intensity workout options to try that range from five to 45 minutes and include all different protocols. Note that since HIIT has such a broad definition we used ...

Set up interval training workouts the right way with these expert tips. But instead of putting together a 30-minute, non-stop workout, break up your program into shorter all-out intervals with ...