The theory of TCM life cultivation and rehabilitation has been believing that people should go to bed late at night and rise early in the morning to be fully bathed in the spring sunlight, let the hair hang down, loosen the clothes and belt, limber up the body and take a hike in the courtyard to make the mind natural and at ease just like the germination and growth in spring. Yang qi ascends in spring. But at this time, wind prevails and the climate changes greatly. Especially during the early spring, yang qi appears before long while cold still does not disappear completely. Thus, the climate changes even more dramatically. Cold wave often attacks people and the climate changes abruptly from warmth to cold. In addition, the yang qi of the human body begins to reach the exterior and the skin striae become loose. Accordingly, the body resistance against pathogenic cold weakens relatively. At this time, the temperature changes dramatically and abnormally, people should avoid the attack of pathogenic wind in time. Especially old people, children and people with weak physique should modify their clothes instantly to keep the body warm. These people should not wear less clothes and use less quilts too early or cut down on clothes abruptly. The ancients' so-called "muffling the body in spring and freezing the body in autumn" is indeed the wise remark of experienced people. Wearing a proper amount of clothing keeps the body warm to resist wind and cold, makes the human body conform to the climatic changes gradually in spring. This can promote the ascending of yang qi of the human body and nourishment of yang.
