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.

Changing your rep range and your workout intensity can help you build more muscle, says an exercise scientist with decades of gym experience.

Learn the exact workout a pro bodybuilder uses to pack on leg size and strength, with heavy compound lifts and smart training strategies you can follow.

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 ...

After a strenuous workout, Air Force Senior Airman Terrence Ruffin walks over to a row of mirrors in the gym and flexes the muscles in his chest, arms and legs. Ruffin smiles at his reflection and ...