Biological clock regimen is a biological life-prolonging method that adapts to the inherent laws of human body. If the biological clock in the human body works normally, the body will be healthy. To this end, if you want to live a long and healthy life, you must adapt to the biological clock. Maintaining the biological clock means that all human activities should be "in tune" and "synchronized" with the operation of the biological clock. The cerebral cortex is the highest regulating organ of various physiological activities of human body, and its basic activity mode is conditioned reflex. If people engage in an activity regularly for a long time, such as living on time, working on time, eating on time, defecating on time, etc. , will form a benign conditioned reflex. This is called "dynamic stereotype" in physiology. Once formed, don't destroy or disturb it at will. Especially retired people, don't disturb their long-term habits at will, otherwise it will damage their health. It is worth noting that all kinds of bad emotions will disrupt the operation of the biological clock and cause disorder. When you are angry, you will have a pulse, heartbeat and accelerated breathing; When you are sad, the digestive juice secreted by the digestive glands will decrease and your appetite will decrease; Fear, hatred, lying, etc. It will make the central nervous system nervous, which will lead to an increase in blood pressure. It can be seen that maintaining a stable mood and ensuring the normal operation of the biological clock are very beneficial to health and longevity.