A trainer tried 5 viral gym-free workouts. Only one delivered consistent, balanced, and sustainable results all week.

No gym? No sweat. (Actually, there will be lots of sweat.) Try these 10 High-Intensity Interval Training (HIIT) workouts at home for results. We could all use another HIIT workout in the rotation.

Today we're going to do a High-Intensity Interval Training workout, or HIIT, H-I-I-T. What we'll do is 20 seconds of an exercise, pushing as hard as you can, then taking 10 seconds' rest.

The words “high intensity interval training” (a.k.a. HIIT) alone might make you sweat, but it’s time to start incorporating it into your routine if you aren’t already. HIIT is a triple ...

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