Teenagers are increasingly turning to protein-packed bars, shakes and powders to help them add muscle to their frames, a new study shows.

Two in five parents say their teen consumed protein supplements in the past year, according to the University of Michigan Health C.S. Mott Children’s Hospital National Poll on Children’s Health.

Teen boys more commonly turned to protei...

A popular tactic among weight lifters is “training to failure” -- pushing yourself to the point where you can’t do a single more rep.

That might help a person grow bigger muscles, but won’t necessarily increase their overall strength, a new ...

Folks nearing retirement shouldn't skip leg days at the gym, a new study advises.

One year of heavy strength training preserves vital leg strength up to at least four years later, researchers found.

"This study provides evidence that resistance training with he...

Bodybuilders are largely unaware that the protein supplements they use to bulk up might harm their fertility, a new study shows.

Four out of five male gym enthusiasts (79%) said they use protein supplements as part of their fitness plan, the poll found.

But only 14% had considered how those supplements -- which contain high levels of the female hormone estrogen -- might impact their...

Lifting weights regularly builds strength and muscle -- and it doesn't matter if those weights are heavy or light.

It's the act itself, and being consistent, that pays off, according to a new study.

All forms of resistance training are beneficial, including body-weight exercises such as planks, lunges and push-ups, according to kinesiologists at McMaster University in Ontario, Canad...

You can keep an arm in a cast from wasting away, researchers say, by working out your free arm.

A small group of young men who performed eccentric contraction exercises with one arm -- lowering a dumbbell in a slow and controlled motion -- saw a 4% strength improvement in the other arm, even though it was immobilized by a cast at the elbow.

Another group assigned to perform concentr...

Look at a bodybuilder who has bulked up with bulging muscles, and it might not seem that lifting weights can shed pounds. But first impressions can be deceiving.

Instead, experts say, building muscle can indeed be one way to transform your body and lose weight.

"Weightlifting activates your large muscle groups and, when done appropriately, can burn more calories than steady state c...

Steroid users, especially teen boys and young men, seem indifferent to the serious side effects and dependency associated with use of the drugs, a new study finds.

"We're seeing more young adults and adolescent boys engaging in risk behaviors, such as the use of steroids, to achieve what many see as the ideal male body,"said lead author