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 ...

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 ...

For the first time, scientists have shown that heart muscle cells can regrow after a heart attack in humans, a process that had previously only been observed in mice.

Every workout does more than strengthen muscles or burn calories — scientists say exercise may literally reprogram your heart ...

In a new research report, a team of scientists led by Johns Hopkins Medicine say people with severe obesity and a common type of heart failure experience weakened heart muscles, and that losing weight ...

Researchers have identified a key protein that may help failing hearts regain function, offering new insight into why some ...

Growing evidence shows that building muscle strength can have benefits for your heart, even leading to better outcomes after a heart attack. Having a higher level of leg muscle strength appears to be ...

Did you know your calf muscles help protect your heart? It turns out, they do more than help you stay balanced and stable. Until recently, and even as a personal trainer, I didn’t know that your calf ...

Just when you thought you understood everything about heart health, scientists have discovered something completely unexpected. It turns out the fat hiding in your muscles might be more dangerous than ...

Add Yahoo as a preferred source to see more of our stories on Google. People with hidden pockets of fat in their muscles – similar to so-called marbling in beef – are at a higher risk of dying from ...