If you're chasing big arms, there's actually a good chance that you want more than big arms. You want well-proportioned arms with definition. And you want that little baseball-sized portion of your ...

Genetics can play a big role in how your muscles look, and let's face it, some people are simply born with standout shape. Take 4x Mr. Olympia Jay Cutler, for example, who had impressive bicep peaks ...

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 ...