First, increase the body's resistance; The second is to promote metabolism; The third is to promote growth and prolong life. Spring is the best season of the year. The climate is getting warmer and everything is reviving. However, spring is also the season of "a hundred herbs sprout and all diseases break out", so we should pay attention to health preservation. "Nourishing yang in spring and summer and nourishing yin in autumn and winter" is a health preserving principle put forward by ancient doctors in China according to the influence of the four seasons in nature on the qi and blood function of human organs. Nourishing yang in spring is important for nourishing liver. In the theory of five elements, the liver belongs to wood, which corresponds to spring, and it is mainly ascending, and it likes openness and hates depression. Therefore, nourishing the liver is first of all to regulate modality. Modern medical research shows that bad mood can easily lead to stagnation of liver-qi, dysfunction of neuroendocrine system and decline of immune function, which can easily lead to psychosis, liver disease, cardiovascular and cerebrovascular diseases and infectious diseases. Therefore, in spring, we should pay attention to emotional health, maintain an optimistic and cheerful mood, make the liver qi unobstructed, and play a role in disease prevention and health care. Raising yang in spring should be sweet and sour. According to Fang, the spring diet should be "sour and sweet to nourish the temper". Chinese medicine believes that the spleen and stomach are the foundation of the day after tomorrow, the source of qi and blood metaplasia, and the spleen and stomach are strong and can prolong life. Liver fire is strong in spring, and eating more acidic food will make liver fire excited and damage the spleen and stomach. We should eat more sweet foods rich in protein, sugar, vitamins and minerals, such as lean meat, eggs, milk, honey, bean products, fresh vegetables and fruits. , help to dispel cold and evil, and help yang. Raising yang in spring conforms to the climate. Spring is warm and cold at first, and the climate is changeable. We should change the temperature according to the climate, and don't suppress the spirit of the sun. "Spring covers and autumn freezes" is a health care experience that adapts to the climate. Because the climate in spring is changeable, cold and hot, people wear winter clothes for a whole winter, so their metabolic function is weak and they can't adjust their body temperature quickly. If you wear thin clothes, you will be easily infected with diseases and endanger your health with a little negligence. Middle-aged and elderly people suffering from hypertension and heart disease should pay more attention to cold and warmth to prevent the occurrence of diseases such as stroke and myocardial infarction. Raising yang is more important in spring and exercising. In spring, the trees are full of flowers and the air is fresh, which is a good opportunity to adopt natural qi to raise yang, and "moving" is the most important part of raising yang. People should choose suitable exercise programs according to their own physique, such as walking, jogging, doing exercises, flying kites, ball games and so on. Or go to the suburbs and scenic spots for a spring outing. This can not only broaden the mind, nourish the mood, but also make the blood smooth, stagnate and evacuate, improve the cardiopulmonary function, strengthen the physique and reduce the occurrence of diseases.