Experts say the secret to feeling strong in the long term is to focus less on the size of a muscle and more on what it can ...

As you bite into a crisp apple, your jaw muscle contracts, allowing you to grind the fruit between your teeth. When you climb a flight of stairs, your gluteus maximus (or "glutes") push your body ...

Some of the best muscle-building foods include protein-rich chicken, salmon, and lentils. You can pair dietary changes with ...

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

Run a finger down the center of the forearm, curl the fingers, and flex the wrist. For many people, a thin cord jumps into view, tight as a guitar string under the skin. It feels deliberate, almost ...

A long-running Swedish study has followed adults for nearly five decades, uncovering when physical decline truly begins. Fitness and strength start slipping around age 35, then worsen gradually with ...

Creatine is a substance naturally produced in the human body. Most creatine goes to your skeletal muscles, where it is then blended with phosphoric acid to produce phosphocreatine. Phosphocreatine ...