The condition known as athlete's heart occurs in highly active individuals, particularly competitive athletes, due to prolonged and intensive training. Dr. Ruchit Shah, an interventional cardiologist at Saifee Hospital in Mumbai, explains that this condition results from the heart muscle adapting to increased physical demands, leading to a thicker heart muscle and a slightly reduced left ventricular cavity size. While these structural changes may raise concerns, they are generally considered a physiological adaptation rather than a harmful condition. A common sign of athlete's heart is a low resting heart rate, indicating improved heart efficiency. Most individuals with this condition do not experience symptoms, and the heart often returns to normal function within three to six months after ceasing intense training. However, it is crucial for athletes with heart changes to undergo medical evaluation to differentiate between athlete's heart and serious conditions like hypertrophic obstructive cardiomyopathy (HOCM), which can pose risks of sudden cardiac arrest.