Heart weakness is caused by insufficient blood supply to the heart muscle, which is mainly due to the narrowing of the lumen caused by atherosclerosis of the coronary arteries. When the narrowing of blood vessels reaches more than 50%, the blood supply to the heart will be affected, and the pumping ability of the heart will be weakened if the blood supply to the heart muscle is insufficient, so the heart feels weak, and the symptoms are usually more obvious after exercise and emotional excitement. Coronary atherosclerosis is formed gradually and is related to diet and bad habits, such as greedy eating, long-term smoking, alcoholism, staying up late, etc. Diabetes can also lead to atherosclerosis, abnormal fat metabolism and other causes of the formation of atheromatous plaque. Therefore, a low-fat diet can prevent plaque formation, i.e., preventing blood vessel narrowing will relieve the feeling of heart weakness, and quitting smoking and drinking, not staying up late, and exercising more will also have some auxiliary effects on improving the symptoms of myocardial ischemia.