Patients with coronary artery disease who need to exercise must be allowed to do so by their doctor. For chronic coronary syndromes, appropriate exercise is an option. If the patient has unstable angina or has recently had an acute myocardial infarction or heart failure, he or she should try to get through the danger period before exercising. The heart rate during exercise should correspond to one’s age, the recommended formula is 170 minus one’s age, if the patient is 60 years old, the heart rate during exercise should not exceed 110 beats/minute. If a patient with coronary artery disease wants to determine more accurately his or her heart rate and tolerance level when exercising, he or she can go to the cardiac rehabilitation department of the hospital and choose a device to perform the recommended amount of exercise. The cardiac rehabilitation department has cardiopulmonary function testers, alarms for myocardial ischemia, etc., which can give patients a clear reference for exercise rehabilitation planning, heart rate and blood pressure during exercise.