Frequent belching during exercise may be caused by improper exercise, improper diet and disease factors. 1. Improper exercise: when the patient exercises, inhalation and exhalation are not balanced, resulting in excessive inhalation of gas during exercise, and when the diaphragm is constantly moving, the gas will be discharged upward, which may lead to frequent belching during exercise. 2. Improper diet: if the patient eats too much gas-producing food, such as groundnut, soybean products, radish, etc., it will lead to a large amount of gas gathering in the stomach, and the gas will be discharged with the movement of the torso, which may lead to hiccups, belching and other symptoms. 3. Disease factors: If the patient has gastrointestinal diseases, such as: gastrointestinal dysfunction, indigestion, chronic gastritis, etc., it will lead to abnormal fermentation of food to produce gas, and belching, hiccups and other symptoms will occur during exercise. When patients belching during exercise, in addition to the above factors, there may be other reasons, the patient is best to go to the hospital for examination, to rule out the possibility of disease, to ensure good health.