If you engage in any sort of athletic endeavor, you know that any stretching you do tends to emphasize the lower body, if you even stretch at all. It makes sense: Your hamstrings, quads, and calves ...

Editor's note: Adam Rees is founder of GRIT Gym, a gym based on results, creating a culture and lifestyle of performance, strength, health and freedom. This is the last of a two-part series on ...

Think doing the best bicep exercises is enough to get you jacked arms like The Rock? You’re mistaken. Yes, the biceps may give your arms that nice rounded ‘peak’ in the front of your t-shirt, but it's ...

The triceps — the forgotten halves of the upper arms. You might hear “welcome to the gun show” after a bicep pump, but rarely do you hear a clever quip about the triceps. Nevertheless, they’re ...

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. Arm day can be one of ...

This triceps workout by New York Bach personal trainer Beate' Jones, NASM, is a great way to start whipping those arms into shape. It's a mix of triceps moves and other upper-body exercises, because a ...

Good things always come in threes: fairy godmothers, parts of a combo meal, boy bands made of brothers (Hi Jonas and Hansen!). So it’s no surprise the most eye-popping muscle in your arms is, in fact, ...