If the patient causes pain in the middle of the chest after strenuous exercise: 1. First of all, we should suspect whether there are traumatic factors such as strains, contusions and lacerations during exercise, which cause pain in the middle of the chest. 2. When a lot of exercise, especially for men with long and lean bodies, it is easy to cause pneumothorax, for tension pneumothorax, open pneumothorax and spontaneous pneumothorax, all of them will have pain in the chest. 3. For strenuous exercise, the patient will also There will be excessive excitation of sympathetic nerves, which will cause increased contraction of the heart muscle, increased oxygen consumption of the heart, accelerated heart rate, and increased conduction speed of the heart, which will result in insufficient blood supply and oxygen supply to the heart, which will lead to ischemia, stenosis, and spasm of the coronary arteries, which will also cause pain in the middle of the chest.