The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

Get ready for the ultimate pump.

Your arms contain many muscles that work together to allow you to perform all sorts of motions and tasks. Each of your arms is composed of your upper arm and forearm. Your upper arm extends from your ...

To work your biceps, you'll mostly need to do exercises that isolate the muscle and force it to flex and supinate under load. That might not be as efficient as your training plan for some other ...

If you want to work the upper body, but are unsure which exercises to do, a back and bicep themed workout is always a great stand by. These muscles are often targeted within one routine because they ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Curls are the classic ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." TO MAKE THE arm muscle gains you want, you'll need to be intentional. Following a balanced workout split ...