How To Stop A Side Stitch When Running (The Cadence Fix)
Dr. Michael Torres, Sports Science Contributor
2026年3月29日
A side stitch when running is a cramp caused by your breathing rhythm fighting your foot strikes. To kill it instantly, switch to a 3:2 breathing rhythm and increase your running cadence to 170-180 BPM. This reduces the heavy bouncing that pulls on your internal ligaments.
What is a Side Stitch?
Exercise-Related Transient Abdominal Pain (ETAP)—what we call a side stitch—is a sharp, stabbing pain usually felt on the lower right side of your ribs. It happens when your diaphragm spasms. The muscle gets tired from a lack of oxygen while constantly being tugged downward by your heavy internal organs with every step you take.
The Science Behind the Cramp
Almost everyone gets them. About 70% of runners deal with side stitches every year.
The main culprit is mechanical. Most runners naturally exhale every time their right foot hits the ground. When you do that, your heavy liver pulls down at the exact moment your diaphragm moves up to push air out. That repetitive collision causes the cramp.
"If you want to stop the pain, you have to stop the tugging," explains sports biomechanics research. "A quicker cadence naturally shortens your stride, making it significantly easier to maintain an alternating breathing rhythm without mental fatigue."
How to Kill a Side Stitch Mid-Run
1. Slow your pace: Drop your speed, but keep your step rate the same. This lowers your immediate need for oxygen.
2. Quicken your steps: Heavy, slow steps cause more bouncing. Listen to a 170 BPM playlist to force shorter, lighter steps. If you use GagaRun, the app automatically filters your Apple Music to only play songs that match that exact tempo. You don't have to do math in your head—just step on the beat.
3. Shift to a 3:2 breathing rhythm: Inhale for three steps, then exhale for two. Because your steps are locked to the music's beat, this odd-numbered rhythm naturally forces you to alternate which foot lands when you exhale. The stress gets distributed evenly.
4. Push on the pain: Dig two fingers gently upward into the painful spot while taking a deep, forceful exhale through pursed lips. This physically helps release the spasm.
Cadence vs. Diaphragm Stress
| Running Cadence (SPM) | Stride Length | Vertical Bouncing | Diaphragm Stress |
|---|---|---|---|
| < 150 BPM | Long (Overstriding) | High | Very High |
| 160 BPM | Moderate | Medium | Moderate |
| 170-180 BPM | Short & Quick | Low | Minimal |
If you have a hard time speeding up your steps, learning how to increase your running cadence without running faster is your first step toward pain-free runs.
Common Questions
Should I run through a side stitch? You can, but ignoring it usually makes the cramp worse. Fix your breathing rhythm first. If that doesn't work, take a short walking break.
Does drinking water cause side stitches? Chugging a water bottle right before a run makes your stomach heavier. That extra weight pulls harder on the ligaments attached to your diaphragm with every heavy step. Drink gradually instead.
Can poor posture cause a side stitch? Yes. If you slouch while running, you compress your abdominal space. Your diaphragm can't fully expand, which leads to faster fatigue and cramping. Run tall.
