It combines strength and cardio into one total body sweat session.

Warmup: Do each warmup exercise for 30 seconds, and repeat the warmup circuit a total of three times. Then take two minutes to work out any kinks you're feeling with some dynamic stretches for you ...

If you've gotten bored doing the same workouts over and over, we recommend switching up your routine ASAP. One way to do this is with quick high-intensity workouts. A great way to do this is with ...

HIIT—which stands for high-intensity interval training—is, simply put, a type of workout that alternates between hard (high-intensity) and easy work. "During this workout, you spike the heart rate to ...