1. Exercise can dilate coronary blood vessels, increase coronary blood flow, dilate small blood vessels, promote the formation of collateral circulation, improve coronary artery stenosis and spasm, improve the compensation ability of coronary artery system for coronary heart disease, improve myocardial access to nutrients, increase myocardial excitability and myocardial contractility, and thus improve cardiac pumping function.

2. Physical exercise can consume excess calories, reduce weight, avoid excessive conversion of calories into fat, improve patients' lipid metabolism, reduce blood triglyceride and low-density lipoprotein levels, and increase high-density lipoprotein levels, thereby reducing blood lipids, lowering blood lipids, improving fibrinolytic activity of platelets, preventing platelet aggregation and thrombosis, and slowing down the development of atherosclerosis.

3. Moderate physical exercise can reduce neurohumoral response, improve pressure load capacity, reduce vascular tension, improve vascular tension, and help reduce cardiovascular and cerebrovascular diseases such as arteriosclerosis, hypertension, cerebral thrombosis and cerebral hemorrhage. It can also reduce the occurrence of severe arrhythmia and the probability of sudden death caused by ventricular fibrillation.

4. Exercise can enhance the sensitivity of skeletal muscle cells to insulin, benefit the utilization of glucose, reduce the burden of β cells, correct the disorder of glucose metabolism caused by relative insulin deficiency and insulin resistance, improve glucose and lipid metabolism, and improve the hormone regulation of the body to maintain the stability of blood sugar.