Theories/Speculation
Cramps or side stitches are thought to be caused by a spasm of the diaphragm as you run. The ligaments involved attach to internal organs that move about as you run. It's this pulling motion that is thought to cause cramps.
Solution
To cure a side cramp experienced while running slow your pace and breathing rate. Take deep breaths. Stretch your arms upward over your head to lift your chest cavity.
Prevention
There are preventative measures that you can take before your run to lessen the probability of getting a cramp. Don't eat a big meal before you run, but drink appropriate liquids to maintain hydration. Warm-up effectively.
Considerations
General fitness plays a role in side cramps, too. Strive to improve your cardiovascular fitness to reduce the chance of getting side stitches.
Effects
Cramps do not cause any harm except for discomfort during running, slowing you down. With time and increased fitness they should happen less often and then maybe not at all.
Article Written By Tanya Wyr
Tanya Wyr has 12 years experience as a professional writer and editor both in print and online. She has written for major retailers such as Wal-Mart, Macy’s and Mervyns. Wyr has also edited college-level textbooks. Wyr earned a B.A. in political science from the University of Minnesota in 1991.