The cause of constipation after exercise is mainly due to physiological reasons such as reduction of water in the body and slowing down of peristalsis in the gastrointestinal tract. If there are intestinal masses, intussusception, intestinal torsion and other diseases can also lead to constipation, which will be further aggravated after exercise. 1. Physiological reasons: after exercise, especially after strenuous exercise, due to the large amount of water loss in the body, it will lead to dry stools that are not easy to discharge; during exercise, the blood in the body is more distributed in the limbs, the blood supply to the stomach and intestines is reduced, and peristalsis is slowed down, which will lead to difficulties in defecation and discharge. 2. Pathological reasons: such as intestinal masses, intussusception, intestinal torsion and other diseases itself is not suitable for exercise, exercise will aggravate the symptoms of constipation, and even trigger the occurrence of accidents. It can be clarified with the help of colonoscopy, abdominal CT, abdominal plain film and other examinations. For the cause of constipation after exercise, it is recommended to consult a doctor for clarification with specific symptoms and auxiliary examinations.