Repeated exercise, or wasting, can change the way key genes work.

Building muscles: Muscle stem cells (their nuclei marked in blue) gradually alter their structure and function, becoming adult muscle cells (whose nuclei turn red). Those cells will eventually fuse ...

The shoulders are one of the most important muscles to develop for an aesthetic physique. Here's how to build them.

MIT researchers have developed a way to help people with amputation or paralysis regain limb control. Instead of using electricity to stimulate muscles, they used light. Here, Guillermo Herrera-Arcos ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." YOU'VE PROBABLY HEARD big guys at the gym tossing around the word "hypertrophy" when they talk about ...

Getting out of a chair shouldn't be a struggle. Yet for many older adults, simple everyday movements like this become ...