Sleep Health in Traditional Chinese Medicine
One of the classic works on TCM health care, "The Three Essentials of Health Preservation," states: "A peaceful sleep is the greatest joy in life. Ancient people said: 'Do not seek elixirs, but seek the method of sleep... After a full night’s sleep, one wakes refreshed and alert—truly no different from an immortal.' Clearly, sleep is extremely important for human beings. In the course of human life, approximately one-third of time is spent sleeping. Sleep and health are lifelong companions. Traditional Chinese medicine has always emphasized sleep science, believing that "sleep and diet are essential to health preservation" and "those who can sleep well can eat well and live long." American researchers studied 7,000 people over five and a half years and found seven factors affecting lifespan, with sleep being a key one. It is well known that humans can survive seven days without food if they drink water, but truly going without sleep for seven days and nights poses a life-threatening danger. A physiologist conducted experiments on dogs: giving them only water but no food allowed survival for 25 days. But if deprived of sleep continuously for five days, their body temperature dropped by 4–5°C, and after another 92–143 hours of sleep deprivation, they died. Autopsy revealed significant morphological changes in the central nervous system. Thus, prolonged sleeplessness inevitably leads to exhaustion—a conclusion entirely logical.
Even long-term sleep deprivation harms health greatly. This is because among all forms of rest, sleep is the most ideal and complete. Some say sleep is nature’s remarkable restorative agent—this is factual. After a good night’s sleep, most people wake feeling mentally refreshed and physically energized. In daily life, people often experience fatigue, listlessness, dizziness, and low productivity when sleep-deprived. But after a good night’s sleep, these symptoms vanish. One metaphor says sleep is like charging a battery—“energy storage.” Indeed, sleep replenishes energy depleted during the day, restoring vitality for the next day’s activities. Scientific research confirms that good sleep eliminates fatigue, allows brain nerves, endocrine system, metabolism, cardiovascular function, digestion, and respiration to rest, promotes tissue growth and repair, enhances immune function, and boosts resistance to disease. Hence the saying: “Sleep is nature’s best tonic.”