Generally speaking, physical exercise plays an important role in all organs of the body, and the importance of physical exercise to the circulatory system lies in strengthening the vascular endothelial function. Patients with a history of coronary atherosclerotic heart disease, myocarditis and pericarditis need to do some physical exercise, but the range of physical exercise should not be too large and the movements should not be excessive. Physical exercise can increase the body's aerobic metabolism and improve the function of cardiovascular endothelium and epithelial cells, so physical exercise is particularly important for cardiovascular rehabilitation. Physical exercise is also good for lowering blood pressure. Patients with a history of hypertension engage in certain physical exercises and also have the function of regulating blood pressure. In addition, physical exercise can also enhance human immunity and improve the body.