An elite bodybuilder said he uses an exercise technique called slow negatives to build more muscle. Also called eccentric reps, negatives can help optimize gains by putting more tension on the muscle.

The latest science shows you might not have to choose.

“Getting lean” is one of those fitness-isms that doesn’t actually mean anything—like “toning,” or “nourishment.” It sort of vaguely means getting in better physical shape. And if you had to put a ...

Plus, studies show that a high-protein diet can help with losing fat and gaining muscle at the same time. Research shows that ...