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

After 50, building and keeping muscle becomes more about working with your body than pushing against it. Hormones change, ...

Muscles make up nearly 40% of the human body and power every move we make, from a child's first steps to recovery after ...

Having different chronotypes, or being more active in the morning vs. afternoon, may play an important role in preserving muscle mass and strength, and metabolic health, according to a new study.

As people age, muscles naturally lose mass and strength, a condition known as sarcopenia. The decline can make everyday ...

People who exercise frequently need to ensure they're getting enough protein in their diet. These 10 foods can help—and are ...

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 ...

Here's how muscle growth, or hypertrophy, works and four ways to optimize hypertrophy including nutrition and resistance ...

Discover four high-protein foods a sports dietitian recommends to help adults over 60 build lean muscle and support healthy ...

You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or ...

Aging muscles heal more slowly after injury—a frustrating reality familiar to many older adults. A UCLA study conducted in ...