Researchers have flagged several issues with so-called SmartFlares over the years, and it’s still unclear why they don’t appear to work under certain circumstances.

A mouse study adds to the growing body of work disputing the ability of progenitor cells to regenerate muscle tissue in adult mammals’ hearts.

This third filament involved in muscle function is often ignored in medical textbooks. Here's how it works.

Even if people exercise, hydrogen peroxide and other reactive molecules continue to accumulate in the tissues.

Titin was discovered four decades ago, but some physiology textbooks fail to recognize the important role it plays in muscle contraction.

Numerous cellular changes underlie the decline of muscle mass and strength in the elderly.

What happens when myosin inside red blood cells can't do its job?

A protein in skeletal muscles helps mice recover from sleep deprivation.

Timekeepers in muscle help mediate metabolism, and may influence neurological processes such as sleep.