Vomiting after exercise may be exercise inhalation of cold air to stimulate the gastrointestinal tract contraction, just after eating exercise to stimulate the stomach nerves caused by, but also may be intense exercise stomach ischemia and hypoxia, hypoglycemia, etc. caused by. 1. winter or morning exercise, inhaling cold air, stimulate the gastrointestinal tract smooth muscle spasm contraction, gastric contents reflux, may appear vomiting. If you exercise just after eating, because the exercise will make the stomach, large intestine and other internal organs shock, increase the burden of the stomach, stomach nerve stimulation will cause vomiting, vomiting can reduce the burden of the stomach. 2. Strenuous exercise or a long time and a lot of exercise, energy and oxygen are mainly gathered in the muscles and limbs, etc., the gastrointestinal tract is in a state of insufficient blood and oxygen supply, nausea and vomiting may occur. Exercise consumes glucose and other substances in the body, some hypoglycemic patients, blood sugar is too low after exercise, nausea and vomiting may also occur. Vomiting after exercise excludes physiological causes such as inhalation of cold air, and may be due to other reasons. If the phenomenon occurs frequently, you should consult a doctor in time to find out the cause and treat it under the guidance of the doctor.