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Add Yahoo as a preferred source to see more of our stories on Google. "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." BUILDING MUSCLE TAKES a plan. If ...

A new study challenges one of strength training’s longest-running debates. The rep debate has been raging in gyms for decades. Should you lift heavy for fewer reps? Go lighter for higher reps? Can you ...

Daily exercises to rebuild muscle after 55, plus trainer-led tips and expert quotes to help you get stronger safely.

Question: When I do 15 to 25 repetitions of a weightlifting exercise, my muscles feel just as exhausted as when I do only eight to-12 repetitions. Is there any difference performing the exercises with ...