Runner’s diarrhea may occur during or after a long distance run, workout, occasional run, or walk (1) .
Exact cause of runner’s diarrhea is not known, but the following may contribute to it:
- Up and down moving of intestine
- Blood moving from the gut to the legs, what switches the gut to the rest mode so existing bowel content can not be digested properly
- Stress, which may trigger irritable bowel syndrome