Erin Beresini is a journalist covering fitness, endurance sports, and health science. She is the author of ‘Off Course: Inside the Mad, Muddy World of Obstacle Course Racing.’ New perk: Easily find ...

Researchers report in the January issue of the journal Cell Metabolism, published by Cell Press, the discovery of a genetic "switch" that drives the formation of a poorly understood type of muscle.

Forget what you’ve heard about "toning" vs. "building"—science proves all muscle is created equal, and your ultimate look ...

People with type 2 diabetes tend to have poorer muscle function than others. Now a research team at Lund University in Sweden has discovered that in type 2 diabetes, a specific gene is of great ...

Can muscles remember their younger, fitter selves? Muscle physiology lore has long held that it is easier to regain muscle mass in once-fit muscles than build it anew, especially as we age. But ...

More than 30 rare muscular dystrophy types cause progressive muscle weakness from inherited gene mutations. Combined, they affect about 1 in 5,000 to 8,000 people. Common subtypes vary by age of onset ...