"Muscle shirt" may soon take on a whole new meaning if new research out of Washington University in St. Louis pans out. A team has found a way to use bacteria to produce synthetic muscle proteins, ...

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

Plus, exactly how to train to sculpt your muscles.

Skeletal muscle is the type of muscle that controls movement. Problems with these muscles can be minor, life-threatening, or ongoing problems that make it hard to perform basic daily activities.

Let’s get one thing straight: Muscle is muscle. Despite what many fitness influencers may have you believe, there’s no such thing as "lean muscle" or "bulk muscle." It’s all made from the same stuff.

Hidden inside every organ, microscopic fibers form a scaffolding that quietly shapes how we move, think, and heal. For the first time, scientists have produced detailed maps of these fiber webs across ...