"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 ...

Still dealing with a tight hip or weak glute—despite all the foam rolling, stretching, and strengthening? Or, maybe you’ve had an injury that keeps flaring up, even though you thought it was finally ...

Still dealing with a tight hip or weak glute - despite all the foam rolling, stretching, and strengthening? Or, maybe you’ve had an injury that keeps flaring up, even though you thought it was finally ...

Waiting 48 hours between workouts may not be necessary for muscle growth, at least among weight room veterans. Justin Sullivan Getty Images files When it comes to exercise frequency, the rule of thumb ...

A new robotic breakthrough out of South Korea may soon turn your clothes into assistive tech. Researchers have found a way to mass-produce ultra-thin "fabric muscles" that can flex and lift like human ...