Lifting things that are too heavy... pushing too hard. Flexing out, and I think doing this specific workout for your stomach too much.
In the large intestine, or colon, salts and water are absorbed from the liquefied food, leaving a semi-solid residue called feces (stool). ... When the stool enters the rectum, stretching causes the muscles of the lower rectum and anus to relax so that the stool can be eliminated by defecation.
Admiring you need the help and then going to get help at a rehabilitation center