Swimming, brisk walking, jogging, cycling and all aerobic exercises can exercise the heart. Aerobic exercise has many advantages: it can exercise the heart and lungs, enhance the function of the circulatory system, burn fat, increase vital capacity, lower blood pressure, and even prevent diabetes and reduce the incidence of heart disease. The American College of Sports Medicine suggests that if you want to know whether the intensity of aerobic exercise is appropriate, you can test your heart rate after exercise to reach 6%-9% of the maximum heart rate. If you want to lose weight through aerobic exercise, you can choose low to moderate intensity exercise and extend the exercise time.