What causes stomach discomfort after exercise?

Generally, gastrointestinal discomfort after exercise may be caused by excessive exercise intensity, short interval between eating and exercising, irritable bowel syndrome, chronic gastritis, gastric ulcers, and other related factors. Symptomatic management through general treatment and medication may be necessary. If discomfort occurs, it is recommended to seek medical attention promptly and receive appropriate treatment under the guidance of a physician. Detailed analysis is as follows:

1. Excessive Exercise Intensity

When exercise intensity is too high, the body consumes significant energy, potentially leading to insufficient blood supply to the stomach and resulting in gastrointestinal discomfort. Symptoms may include pallor and fatigue. It is recommended to appropriately reduce exercise intensity in daily routines, following the principle of gradual progression to allow the body to adapt to physical activity.

2. Short Interval Between Eating and Exercising

If the interval between eating and exercising is too short, food may not have been fully digested. During exercise, undigested food can slosh around in the stomach, irritating the gastric mucosa and increasing gastric acid secretion, which may cause symptoms such as bloating and sharp pain. It is recommended to maintain at least a one-hour interval between eating and exercising, allowing sufficient time for stomach digestion.

3. Irritable Bowel Syndrome

Irritable bowel syndrome is a common functional bowel disorder caused by multiple factors, including abnormal gastrointestinal motility and visceral hypersensitivity. The body's stress response during exercise might exacerbate intestinal sensitivity and abnormal peristalsis, leading to symptoms such as abdominal pain, diarrhea, or constipation. It is recommended to take medications such as mebeverine hydrochloride tablets, alverine citrate capsules, or pinaverium bromide tablets under a doctor's guidance for treatment.

4. Chronic Gastritis

Chronic gastritis is mainly triggered by factors such as Helicobacter pylori infection, drug irritation, and unhealthy dietary habits. Patients with chronic gastritis have inflamed gastric mucosa, which might be further damaged after exercise, causing gastrointestinal discomfort. The underlying mechanism is that the body's stress response during exercise may worsen mucosal congestion and edema, leading to symptoms such as pain and bloating. It is recommended to follow medical advice to use medications such as omeprazole enteric-coated tablets, lansoprazole tablets, or pantoprazole enteric-coated tablets to alleviate symptoms.

5. Gastric Ulcer

Prolonged alcohol consumption, smoking, or eating spicy foods may damage the stomach mucosa's defense mechanisms, leading to gastric ulcers. During exercise, sympathetic nerve activation might increase gastric acid secretion, which irritates the damaged mucosa, causing discomfort such as stomach pain and burning sensations. Accompanying symptoms may include epigastric pain, heartburn, and reduced appetite. It is recommended to take medications such as rabeprazole sodium enteric-coated tablets, esomeprazole magnesium enteric-coated tablets, or cimetidine tablets under medical supervision.

It is also recommended not to sit or lie down immediately after exercising. Instead, take a slow walk for a while, and once the body has stabilized, find a comfortable place to sit and rest, which helps relieve gastrointestinal tension.