Scientific defecation means that defecation habits should be in accordance with the laws of movement of the gastrointestinal tract and the physiological functions of the rectum and anus. Group peristalsis is a form of intestinal movement that occurs in the morning after waking up or after meals, caused by the duodenal-colonic reflex, so it is necessary to develop the habit of defecating on time every day and preferably in the morning after waking up, in order to be consistent with the laws of movement of the gastrointestinal tract. The physiological function of the rectum and anus is to produce the desire to defecate through the nerve reflex caused by the pressure in the rectum, and then the anus opens to expel feces. This is a natural process with a very short time, but if you artificially prolong the time of defecation or hold back the stool, it will make the pressure in the rectum continue to be high, easily lead to the blood supply of the intestinal wall muscle cells is impaired, there are pathological changes such as degeneration of the intestinal wall muscle fibers, muscle atrophy and degeneration, deformation and reduction in the number of intestinal wall intermuscular plexus, as a result, the tension and nerve sensitivity of the intestinal wall muscles continue to decline and lead to constipation, so defecation time It is not advisable to take too long to defecate and not to hold back the stool. Japanese scholars have proposed that it is appropriate to finish defecating within 5 minutes, and British scholars have proposed that each defecation should not exceed 8 minutes, all of which emphasize the importance of controlling defecation time. Scientific bowel movement 1, defecation should be regular, once a day in the morning. 2, control the time of defecation, each time no more than 8 minutes, the less time the better. 3, do not often hold back the stool.