Experts explain what to know about the training method.

I'm a Fitness & Nutrition writer for CNET who enjoys reviewing the latest fitness gadgets, testing out activewear and sneakers, as well as debunking wellness/fitness myths. In my free time I enjoy ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." POV: You started working out a few months ago, and you've been consistently hitting the same reps of the ...