In modern society, with the improvement of people's living standards and  increasing competition, there are more and more cases of acute myocardial  infarction in young and middle-aged people. The main causes are increased  stress, reduced physical labor, diet and environmental pollution, diet  structural changes and environmental pollution, which can easily cause  physiological disorders in blood vessels, nervous system, endocrine system and  immune system. How to strengthen self-protection from MI? The first is to quit  smoking and drinking. Smoking is significantly related to coronary  arteriosclerosis. Harmful components such as tar in the smoke can cause  vasospasm. Carbon monoxide can also reduce the oxygen-carrying ability of  hemoglobin in the blood and cause myocardial hypoxia. Excessive alcohol  consumption may elevate blood pressure and increase heart burden. The second is  to promote healthy eating, avoid overeating, and follow the "four less three  more" principle, which means less sugar, less salt, less fat, less starch, more  vegetables, more fruits and more protein. The third is to exercise properly and  actively, and avoid sedentary. You may choose walking, swimming, brisk walking,  Tai Chi, etc. Pay special attention to the combination of movement and static  when exercising. Exercise, such as swimming and brisk walking, can exercise  cardiovascular. The fourth is to learn to decompress yourself. Young people  should not live under pressure. If you feel stressed, you can give yourself some  time to relax. And the daily routine is also very important. Do not stay up  late, and live a regular life with moderate pace. It is very helpful to relieve  stress.