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

More than 30 types of muscular dystrophy have been identified. They all cause problems with movement due to muscle protein defects caused by genetic mutations. Muscular dystrophy is a group of ...

The misconception that muscle can be lean or bulky lies in its appearance. “When people (say ‘lean’), they’re usually ...

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.

Have you ever noticed? Why does it happen to some people that they can’t lose weight even after a lot of effort, whereas for ...

Most fitness-minded people have probably heard of fast- and slow-twitch muscle fibers. However, the distinction can be somewhat mysterious, especially in the context of understanding how it relates to ...

What's the first thing that comes to mind when you think about the words twitch and muscle? Spasms, perhaps. You'd hardly be alone in thinking that. But when it comes to fitness, it's most commonly ...

A concentric contraction is a type of muscle activation that causes tension on your muscle as it shortens. As your muscle shortens, it generates enough force to move an object. This is the most ...

Exercise in the future could be customized for individuals based on genomics, according to a new study. For years, scientists have studied the effects of different types of exercise on the human body, ...

Higher levels of muscle mass and less visceral fat are linked to younger brains, according to a new study. It’s another sign ...