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 ...

A marathon pushes the human body close to its limits. Legs tire, lungs burn and the heart works hard for hours on end. For ...

The human body is a remarkably resilient thing, as many case studies of people surviving without organs tell us ...

For years, that strain has raised an uncomfortable question: does running 26 miles actually damage the heart? The strongest reassurance comes from a new ten-year study of 152 recreational marathon ...