Many people don’t realise that temperature plays a major role in how the heart responds to exercise. These different reactions to hot and cold temperatures may not be immediately evident, but they ...

Your heartbeat lets you know how hard your heart is working to circulate blood throughout your body. Things like exercise, a fever, warm weather, medications, stress, and underlying health conditions ...

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 ...