Abdominal cramps upon exertion may be caused by improper diet, excessive exercise, acute enteritis, intestinal dysfunction, intestinal obstruction, cold abdomen and other factors. 1. Improper diet: frequent or large amounts of ice-cream, ice water and other cooler foods may cause some stimulation of the gastrointestinal tract, resulting in continuous spasm of the intestinal tube, which can lead to abdominal cramps upon exertion. 2. Excessive exercise: if you do a lot of sit-ups, squatting, frog jumping and other exercises, it may cause the abdominal muscles to be in a state of tension for a long time, and then it is easy to have cramps when you exert yourself in the abdomen. 3. Acute enteritis: If the intestinal mucosa is infected by bacteria, viruses, microorganisms and other infections, acute inflammation may be triggered, and abdominal pain, diarrhea, abdominal distension and other symptoms may occur, abdominal pain is paroxysmal and sudden onset, mostly colic. 4. Intestinal dysfunction: frequent intestinal contractions during intestinal spasms, and cramping pain in the abdomen may occur when rapid spasmodic contractions occur, which is a more common situation. 5. Intestinal obstruction: small or large intestine due to occupational lesions, such as tumors or the presence of fecal impaction, etc., can also cause intestinal paroxysmal, rhythmic cramp-like pain. 6. Cold abdomen: not paying attention to keep warm in cold weather can lead to abdominal cramps, and should take timely measures to keep warm in case of weather changes. Abdominal cramps may also be caused by other reasons, and should be promptly consulted to avoid delay. If necessary, check the blood routine, abdominal ultrasound, abdominal plain film to understand the condition of abdominal organs.