High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts ...

High intensity interval training made headlines in the 2010s with one specific claim: that short bursts of hard work can give the same aerobic benefits as longer sessions of jogging or cycling. But ...

The way most HIIT workouts are structured, your body is forced to go from zero to 100 and back again every time you switch between resting and active intervals. And while those moments of recovery ...

This iPhone app is so elegantly designed that, while you still won’t want to work out, you’ll really wish that you did. Runkeeper was placed on Earth by supreme beings of some sort. Its programmable, ...

Gym rats know the power of HIIT—high-intensity interval training. Those all-out, repeated blasts of activity seem daunting, but those who try it swear by it, often telling anyone within earshot that ...