Exercise is one of the best medicines we have today. If it were a pill, everyone would be told to take it. Theodor Van Stephoudt says exercise is special because it is easy and costs nothing. Studies show that exercise can help prevent and control serious illnesses like diabetes, obesity, high blood pressure, heart problems, and some types of cancer. It also strengthens the immune system, helping to lower the chances of severe symptoms, complications, and deaths from viral infections.