Side stitches plague most runners. Up to 70 percent of runners experience exercise-related transient abdominal pain, or ETAP, every year. The exact cause remains unclear, but researchers point to three main culprits: breathing patterns that irritate the phrenic nerve, changes in blood flow around the diaphragm, or poor posture during running.
When a stitch strikes mid-run, several techniques provide relief. Slowing your pace gives your body time to recover. Stretch by raising your arms overhead and leaning toward the opposite side of the pain. Applying gentle pressure to the cramped area while taking deep breaths also helps.
Prevention works better than treatment. Start by practicing mindful breathing during exercise. Rather than shallow chest breathing, focus on controlled, rhythmic patterns that sync with your stride. Eating large meals or drinking substantial fluids one to two hours before running irritates the abdomen, so time your nutrition strategically. Even small snacks close to workout time can trigger stitches.
Core strength and posture matter more than many runners realize. Weak abdominal muscles force your diaphragm to work harder, increasing stitch risk. Incorporate planks, dead bugs, and bird dogs into your routine. During runs, maintain an upright posture with relaxed shoulders rather than hunching forward.
Hydration prevents stitches, but timing is key. Drink water consistently throughout the day rather than chugging large amounts right before exercise. A sports drink with electrolytes may help your body retain fluid better than plain water alone.
Gradual progression protects your body. Increasing mileage or intensity too quickly strains your diaphragm and supporting muscles. Follow the 10 percent rule: add no more than 10 percent additional distance weekly.
Most runners experience stitches occasionally regardless of their training