Today, let's dive into the secrets of an athlete's heart. My name is doctor Gosha Wamil. I'm a consultant cardiologist at the Mayo Clinic Healthcare in London. Elite athletes often have what is known as an athlete's heart. It's a medical term that describes the physiological adaptation that the human heart undergoes with regular and rigorous exercise. It is absolutely fascinating to discover how the training that the athletes undergo changes the shape and the size of their heart. In fact, a wonderful and efficient heart of an athlete has increased stroke volume. This is an amount of blood that the heart ejects per minute, and therefore, the athletes heart is much more efficient in pumping blood. Those fantastic adaptations help us to get some insight in the benefits of exercise on a human body, and especially the cardivascular system and the heart. This summer, let's get motivated to become fitter, more active, and push yourself to limits, but do it safely.