Patients with coronary artery disease should not engage in heavy physical labor because it can aggravate the condition of patients with coronary artery disease. Patients with coronary artery disease may be overexcited by sympathetic nerves when they are engaged in heavy physical work or when they are stressed, anxious or angry. Central overexcitation will lead to abnormal vasoconstriction of small arteries, resulting in increased blood pressure, increased heart rate, and increased myocardial contraction, which will lead to myocardial ischemia and lack of oxygen, triggering angina pectoris and myocardial infarction in patients with coronary artery disease. Therefore, if a patient is engaged in heavy physical labor and suffers from significant chest tightness, shortness of breath, chest pain, etc., this is due to a serious decrease in coronary artery blood supply and the formation of unstable angina pectoris. Therefore, if you engage in heavy physical work will lead to increased cardiovascular load, so heavy physical exercise is not recommended for patients with coronary heart disease.