There is no object that does not move, and there is no movement that can leave the object. Movement is conservative, that is, it can neither be created nor destroyed, but its concrete forms are diverse and can be transformed into each other, and the total amount of movement remains unchanged during the transformation.
In geometry, rigid body motion is described as a mapping from a plane to itself, and the distance between any two points A and B is the same as the distance between their images. In philosophy, motion is defined as the linear migration of things in time and space.
An activity involving physical strength and skill, bound by a set of rules or habits, is usually competitive. The other is a social activity with physical exercise as the basic means, combined with natural factors such as sunshine, air and water and health care measures, to achieve the purpose of strengthening physical fitness, improving health and enriching social, cultural and recreational life. Physical education plays an important role in promoting normal physical development, improving mental health, enhancing social adaptability and cultivating all-round talents. Second, it refers to the educational activities that guide students to learn and master the basic knowledge and skills of physical education in the school education environment, so as to form their awareness of physical exercise, improve their physical activity ability and promote health. Physical education is not only an effective means of education, but also an important content of education.
Movement is the inherent nature and existing mode of matter, and it is the inherent fundamental attribute of matter. There is no matter that does not move, and there is no movement without matter. Movement is conservative, that is, it can neither be created nor destroyed, but its specific forms are diverse and mutually transformed, and the total amount of movement remains unchanged during the transformation.
In the process of exercise, the body structure will change with exercise, which can enhance one's physical fitness and promote metabolism. Exercise is one of the lifestyles that human beings can't live without.
Since the ancient Olympic Games, the organization and related rules of sports have been continuously strengthened. Industrialization has given residents in developed and developing countries more leisure time to participate in and watch ornamental sports. The number of people participating in sports has increased and communication has become more common. With the strengthening of mass media and global contact, this trend is more obvious. The specialization of sports has become the mainstream and sports have become more popular. Sports fans chase professional athletes through radio, television and internet, and they also participate in amateur sports to get exercise and entertainment.
Some research data show that regular exercise can make the brain's exciting and inhibiting processes alternate reasonably, and at the same time keep the nervous system excited and avoid excessive nervous system tension, thus achieving the purpose of eliminating fatigue and keeping a clear head. In sports, all attention will be focused on how to exercise, so that all other ideological and emotional burdens can be put aside. In addition, exercise can improve the quality of sleep and ensure sufficient energy when awake, which is extremely important for learning.