Add Yahoo as a preferred source to see more of our stories on Google. In his latest challenge, the 25-year-old links up with professional bodybuilder Valerie Ratelle — "[there's] more definition in ...

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.

Every bro in the gym knows that “pump” feeling—veins spiking, muscles swelling, skin tight enough to crack. It’s more than vanity: The pump signals you’ve flooded your muscle with blood and ...