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The labor force is introduced as follows:

From the philosophical point of view, labor is the unity of subject, object and meaning. Labor is an important way to promote growth and an important condition for social development.

Labor is the foundation of the survival and development of human society, which mainly refers to the process of producing material materials, and usually refers to human movements that can export labor or value to the outside world. Labor is the only means for people to survive and develop themselves. According to the traditional labor classification theory, labor can be divided into two categories: mental labor and manual labor.

Labor is a special form of human movement. In the commodity production system, labor is the expenditure and use of labor force. Marx gave us this definition: "The use of labor is labor itself. The buyer of labor consumes labor, which means that the seller of labor provides labor. "

The classification of labor is introduced as follows:

According to the traditional labor classification theory, labor can be divided into two categories: mental labor and manual labor. Because there is a major contradiction in human nature, that is, the contradiction between human consciousness subject and life ontology.

Any human behavior is the externalization of these contradictions and the comprehensive result of them. Physical labor and mental labor refer to physical labor or mental labor that is not completely separated in human practice. This does not mean the separation of the two in expression, but the unity of the two in practice, which stems from the relationship between concept and practice itself.

Physical exercise is introduced as follows:

Physical exercise refers to the main body movements, such as walking and carrying water, which are mainly based on the movements of human muscles and bones and supplemented by the movements of physiological systems such as the brain. Physical exercise is a form of exercise that all animals have. When organisms evolve to a certain extent, animal movement systems are formed.

The formation of physical exercise enables animals to flexibly choose objective things and external environment by changing the spatial distance between animals and external objective things; On the other hand, it can form a certain mechanical force through muscles and bones, and change the mathematical and physical properties of things, such as spatial position, shape and size.

The formation, maintenance and development of any physical exercise must depend on the participation of other physiological systems of the body and provide them with material, energy and information, so physical exercise must be accompanied by the movement of other physiological systems.