2. The greater the anorectal angle formed by the rectal muscle and the rectum and the straighter the rectum, the smoother the bowel movement. When sitting, the anorectal angle is about 80 to 90 degrees, and when squatting, the anorectal angle can reach 100 to 110 degrees. In addition, the abdominal pressure is high when squatting, which can promote defecation, and the household toilet stool can help us increase abdominal pressure. Especially for people with cardiovascular and cerebrovascular diseases, squatting row can reduce the chance of accidents.