"Keeping fit" is the essential function of physical education. Physical education takes physical exercise as the basic form of expression, and through the scientific combination of physical exercise, it gives various organs and systems a certain amount and intensity of stimulation, which promotes the body to produce a series of adaptive reactions and optimized changes in morphological structure, thus enhancing physical fitness.

The transformation of human nature by sports is not only the unity of morphological structure and physiological function, but also the unity of body and mind. Physical education teaching should pay attention to students' intangible psychological development while pursuing students' physical transformation.

We should make good use of the inherent attraction of sports activities and multiply and amplify this attraction through reasonable teaching organization. Physical education teaching should be a kind of happy teaching, emphasizing active participation in the process, so that interpersonal relationships can be relaxed and harmonious, and physical and mental health can be developed.

Extended data:

Traditional sports in China is an important part of sports in China and a valuable cultural heritage of the Chinese nation. Many excellent national traditional sports not only have strong fitness value, but also have high artistic value and rich entertainment and educational functions.

After the founding of New China, the government paid special attention to the development of traditional sports of ethnic minorities, and has excavated and sorted out more than 1000 sports. For example, Mongolians are known as "men's triathlon" in wrestling, horse racing and archery. Hui people kick shuttlecock and tug of war.

Leisure sports, outdoor sports, recreational sports and fitness activities are constantly developing, thus promoting sports consumption, sports industry development and economic development.