If you have a cramp in the right side of your body while running!

Exhale when you step on your left foot. The same rule applies when your left side is hurt — just exhale when you step on your right foot. And massage your hurt side slightly. When you run, blood flows to the working muscles. Without a proper warm-up, blood does not spread evenly and, thus, overflows the liver and the spleen. These organs then start pressing on the diaphragm.