The reason why Qigong has the function of health preservation and longevity is that, first of all, by practicing Qigong, you can dredge the meridians of the human body, circulate qi and blood, and especially make the human body full of vitality, so you can strengthen your body without illness and treat diseases; Secondly, it is because the practice of various qigong techniques can integrate essence, qi and spirit, enhance the vitality of the body, naturally prolong life, delay aging, and live a long and healthy life. Liu is a famous qigong master in China. In his book "The Practice of Qigong Therapy", he elaborated on the principle of qigong health preservation, and now he quoted the following points: 1. The argument of "Qi-oriented" runs through the theory of Qigong, and the guiding point of nourishing qi and consolidating the foundation is also emphasized in the practice of qigong. Then, through what mechanism does Qigong realize the function of nourishing vitality? Su Wen Yan Gu Naive pointed out: "Nothing is indifferent, and the true qi follows; The spirit, the disease is always safe. " This is an incisive exposition and summary of the mechanism of Qigong nourishing qi. Traditional Chinese medicine believes that essence, qi and spirit are the internal causes of the human body and generally reflect the functional state of the human body. Qigong is a kind of self-exercise health-keeping method which combines the activity of "muscle, bone and skin" with the activity of "essence, qi and spirit" inside. "Essence" includes the essence of congenital kidney and the essence of acquired valley, which acts on the whole body through organs such as lung, heart and spleen to ensure the realization of physiological activities such as human growth, development and reproduction. Qigong has obvious influence and function on essence. As long as you practice properly and persevere, both the innate essence and the acquired essence will be strengthened and enriched. Male patients' nocturnal emission, premature ejaculation, cold sperm, leukorrhagia, metrorrhagia, scanty menstruation and pathological amenorrhea all belong to the pathological range of essence, and these pathological phenomena can get different effects through practice, which is the evidence that Qigong acts on yin essence. For patients with dyspepsia and malnutrition, through the intersection of heart and kidney in Qigong, kidney yang is the secret, spleen yang gets kidney and health, and stomach yin gets kidney water and moisture, so that stomach fu-organs and health are good at accepting rot, spleen is transported and pulse is weak, and the clinical manifestations are increased appetite and food intake. The exuberant secretion of digestive glands, the strengthening of anabolism and the improvement of nutritional status are all evidence that Qigong plays a role in Shuigujing. The above is the expression of qigong on acquired essence. Qigong is also beneficial to innate essence. Congenital essence is hidden in the kidney, and qigong is intended to hide life in the abdomen, which is a technique of enriching essence and water. The innate essence depends on the cultivation of the acquired essence. Through sucking and pinching exercise, there is little desire to practice, yin essence is naturally enriched and converged, and the essence in the kidney is nourished by yin essence, making it stronger and more beneficial, with refined elements and solid vitality. This is the inevitable trend of "refiner". Obviously, Qigong's function of nourishing essence and water is the mechanism of Qigong's nourishing vitality. After practicing vitality, it can better stimulate and promote the normal and effective physiological activities of zang-fu organs, which is of great significance to maintaining health. In addition, it can further play the role of practicing qi and nourishing the spirit. God, including innate God and acquired knowledge. Shen Yuan is biochemical in innate vitality, and knowing God is biochemical in nature. Both Yuan God and Zhi God are derived from matter, and both react to matter. Su Wen's theory of transferring refined qi says: "those who get qi prosper and those who lose it die", and points out the importance of qi in life activities, which is another important significance of qigong to nourish qi. 2. Regulating Yin and Yang Through experimental research and clinical observation, it is also confirmed that the regulating effect of Qigong on the balance of Yin and Yang is universal. Traditional Chinese medicine believes that form and essence can be transformed into functions, which is a normal physiological phenomenon that yang comes from yin, but when the body is too active, form and essence can be consumed. After qigong exercise enters a quiet state, the excitation intensity of sympathetic nerve is weakened, gas metabolism is reduced, hyperresponsiveness is corrected, and hyperactivity symptoms are adjusted, which are the concrete manifestations of qigong's function of suppressing yang and supporting yin. According to the theory of "kidney deficiency", it was observed that the limbs of patients with kidney-yang deficiency changed from cold to warm, urine ketosteroids returned to normal level, and plasma adenosine triphosphate. The increase of cyclic adenosine monophosphate content and the enhancement of leukocyte phagocytosis are all manifestations of qigong's aphrodisiac effect. Qigong's function of regulating the dynamic balance of Yin and Yang is realized through the dual modulation effect of "restraining hyperactivity and helping the weak", which is manifested in different levels. This is the mechanism of qigong treatment and health care. 3. The health care function of Qigong is realized by "dredging meridians". Clinically, it is observed that the measured values of meridians on both sides of limbs of patients with meridian obstruction and qi-blood imbalance are unequal or very different; After practice, all weak qi and blood can be enhanced to varying degrees through practice. During the practice, it is also observed that the meridian induction is obvious, and the internal qi runs along the meridians such as Ren Du, which are the concrete manifestations of Qigong's function of dredging meridians. The above is a detailed exposition of the health care mechanism of Qigong longevity by Liu, a famous Qigong master in China. It shows that Qigong is an excellent fitness method, and everyone who wants to be healthy and "live to the old age" should study hard and practice hard in order to truly inherit and carry forward this precious heritage of Chinese medicine. So from what aspects does Qigong play a role in health care, medical treatment and longevity? We only briefly discuss the following aspects.