A marathon pushes the human body close to its limits. Legs tire, lungs burn and the heart works hard for hours on end. For years, that strain has raised an uncomfortable question: does running 26 ...

Your heart works every second of your life to keep blood moving through your body. Inside the heart, there are four small but ...

A healthy heart doesn’t begin in the doctor’s office—it’s shaped by everyday habits like quality sleep and good oral healthcare. To help make sense of how these often-overlooked factors—sleep and oral ...