Scientists have shown that a single injection of self-amplifying RNA, delivered into skeletal muscle rather than the heart ...

A single injection of a new, experimental form of self-amplifying RNA prolonged hormone synthesis for many weeks, healing the heart in pigs.

Not hitting legs often? You might want to rethink that. A solid leg workout could actually be the key to a healthier heart.

When heart muscle gets damaged, the result is often permanent. Unlike other muscles in the body, the heart has long been believed to lack the ability to heal itself. But recent research suggests that ...

Study shows greater muscle area in men leads increased risk of heart disease; it's different for muscle density. Body composition -- often expressed as the amount of fat in relation to muscle -- is ...

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

Eric McClane, of York County, suffered a severe heart attack caused by a completely blocked artery and survived.