Why do I feel like vomiting after running on an empty stomach in the morning?

Feeling nauseous after running on an empty stomach in the morning could be due to weather conditions, intense exercise, or possibly indicate a stomach condition such as gastric ulcer.

1. Weather conditions

Feeling nauseous after running on an empty stomach in the morning might result from cold weather. Breathing heavily during the run can cause excessively cold air to enter the abdominal cavity, irritating the gastrointestinal tract.

2. Intense exercise

Nausea may also occur if the running pace is too fast, leading to abnormal gastrointestinal motility or a mismatch between muscle activity and internal organ function, which fails to meet the demands of physical exertion. The individual may simultaneously experience other symptoms such as shortness of breath, muscle soreness, and slowed movements.

3. Gastric ulcer

If the individual already has a gastric ulcer, this condition can also cause the aforementioned symptoms. Running may trigger excessive secretion of gastric acid, irritating the gastric mucosa. This may be accompanied by symptoms such as abdominal pain, bloating, belching, fatigue, chest tightness, reduced appetite, and weight loss.