You can't 'tone' muscle, so here's what is really happening when you build muscle definition, and why you need to know about ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." There are few things worse than an achy, lower body. That discomfort is extra miserable when accompanied ...

The back consists of large, complex muscles that support your trunk and spine. There are many types of back muscles, and they are all essential, helping you walk, bend, twist, and hold your body ...

This story is from Manual, GQ’s flagship newsletter offering useful advice on style, health, and more, four days a week. Sign up here to get it in your inbox. Despite what many workout equipment ...