Chest tightness that improves after exercise is usually considered cardiac neurosis, autonomic dysfunction or arrhythmia. 1. Cardiac neurosis: when patients suffer from cardiac neurosis, they often have symptoms of cardiovascular and circulatory system such as chest tightness and chest pain, but usually there is no basis for organic lesions, which are functional changes and generally do not require special treatment, which can be supplemented with psychotherapy and necessary anxiety relief treatment. 2. Autonomic dysfunction: when the patient’s autonomic dysfunction, resulting in precordial discomfort, due to the exercise can have a certain effect on the regulation of autonomic function, which can be relieved, at this time the feasibility of electrocardiography and other ancillary tests for a clear diagnosis. 3. In addition, may also be due to the existence of arrhythmia caused by chest tightness, exercise after the heart rate returns to normal so that the situation improves. In short, patients with chest tightness after exercise is generally considered to be due to cardiac functional, organic diseases or autonomic dysfunction caused by dysfunction, if affecting the normal life, we need to consult a doctor in time for treatment.