There is no optimal time for older people to have a bowel movement, there are recommended time periods, usually in the morning after waking up and after breakfast. It is recommended to develop a good, regular bowel habit. 1. After waking up in the morning: After a night of digestion and absorption, the stool has entered the colon. The “rising reflex” in the morning makes the intestinal peristalsis increase, and the intestinal pressure increases, resulting in the urge to have a bowel movement. At this time, you do not need to use too much force to pass the stool, and you can pass the stool smoothly. 2. After breakfast: Food enters the stomach and stimulates the gastrocolic reflex, which increases peristalsis and intestinal pressure, resulting in the urge to defecate. At this time, there is no need to exert too much force to pass stools. Elderly people are usually recommended to defecate in the morning after waking up and after breakfast, but there is no need to deliberately in these two moments, only need to arrange the time in normal life, and develop a good habit of defecation is good.