Let's clarify what's true and what's not about HIIT.

Because HIIT should make your body tired, not bored

A recent study just found that one workout is particularly adept at burning off belly—aka visceral—fat.

Train hard with this high-intensity interval workout—no equipment needed.

This HIIT bodyweight routine will torch calories and challenge your body in totally new ways, no matter where you are.

All you need to do this workout is a set of dumbbells. Ready to feel the burn from head to toe?