The back isn't just the largest muscle group in the upper body; it's also a real calorie-burning machine. The stronger and more active your back is, the more calories you'll burn throughout the day!

A CSCS expert shares a 6-minute standing arm routine after 50 that targets arm flab more effectively than traditional weight ...

Get ready for the ultimate pump.

"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 ...

Leg day, arm day, ab day—but what about lat day? Lats are the largest muscles in your upper body and the core of any workout routine. Most people use the term lats, but the scientific name for the lat ...

You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life. You can strain ...

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. You probably work your ...

Bed exercises to tighten arms after 55, a CSCS trainer shares 4 joint-friendly moves to firm triceps and shoulders.

Here's how to do the side-lying Pilates double leg lift.

There’s a robust molecular language being spoken between your muscles and your brain. We’ve often thought about muscle as a thing that exists separately from intellect—and perhaps that is even ...