Coronary heart disease patients should avoid exertion, especially strenuous activities, exertion or strenuous activities will lead to increased heart rate, increased heart rate will cause increased myocardial oxygen consumption, coronary heart disease patients due to coronary vascular spasm or coronary vascular stenosis, resulting in a relative lack of blood supply, myocardial oxygen consumption increases the blood supply to the heart, oxygen supply is relatively insufficient to cause angina pectoris symptoms. Therefore, patients with coronary heart disease are afraid of exertion, to avoid strenuous exercise, avoid heavy physical activities, if the patient after exertion or strenuous activities angina symptoms, such as chest tightness, chest pain, must rest in time to relieve the symptoms.