What causes a stitch when running?
It is a common misconception that it is lactic acid building up, thinking about it logically, lactic acid builds up due to lack of oxygen meaning aerobic respiration can not take place and the body is forced to anerobically respire, but this is a local thing and so that is why you get it in specific areas which are working specifically hard, so when jogging, this will not happen, particularily in the stomach. There have been many theories as to the explanation, but Dr tim noakes has perhaps given the most conclusive explanation, ‘Thick fibrous bands called ligaments extend downward from your diaphragm to hold your liver in place. When you run, your liver drops at the exact time that your diaphragm goes up, stretching the ligaments and causing pain. Humans have a fixed pattern of breathing when they run. They have a two to one breathing ratio, breathing once for each two strides. Most people breathe out when the right foot strikes the ground. When you breathe out, your diaphragm goes up
