Sports are a must-do to maintain a healthy lifestyle. A lack of physical activity promotes overweight, diabetes and cardiovascular diseases. But not only too little exercise is a health risk, too much can also be dangerous. Both athletes and non-athletes have to consider their vascular health, since both congenital and acquired diseases can cause a myocardial infarction during exercise. But sports do not only keep a person healthy. If exercise is performed in the right way, it helps patients to get healthy again and supports them during cancer therapy, for example.