This kind of situation may be more common in people who usually lack exercise, such as sudden heavy exercise, cardiac function can't keep up with the needs of exercise for a while, uncoordinated movements, breath holding and so on. , leading to reduced blood reflux, cardiac output decreased significantly, resulting in temporary cerebral ischemia. It is suggested to insist on exercise, strengthen physical fitness and strengthen diet and nutrition. If this happens frequently, we should be alert to the possibility of myocardial ischemia and myocardial strain. It is suggested to check the myocardial zymogram and electrocardiogram to see if this is the initial coronary insufficiency of coronary heart disease.