As a living body, human beings have spirit and spirit besides body and limbs, which is the unity of form and spirit (otherwise it is body, not life). "Form depends on God, and God must exist in form", "cultivate nature and protect God, and feel at ease all over". Proper physical exercise can guide and nourish the qi and blood of the body and keep the whole body awake; Excessive exercise damages people's mind, consumes energy and harms life. Therefore, nourishing essence, qi and spirit is the main body and key to preserve health and prolong life. As the saying goes, take a breath inside and exercise outside. "Qi" is energy, the source of all things, the most subtle basic form of all things, and the bridge to communicate "essence". Qi is more the existence of life. Therefore, it is necessary to carry out appropriate external physical exercise to ensure the relaxation of human bones and muscles, and to guide the smooth flow of internal qi and blood, and to cultivate the spirit of abstinence, strengthen essence and nourish qi, nourish the mind and nature, nourish the heart and Xiu De, and be convinced, so as to achieve the purpose of recuperation. When you reach the highest three realms of health care, you are full of essence, vitality and prosperity. Full of essence means full of qi, full of qi means full of qi, and full of qi means full of essence.