First, the principle of safety.

Safety principle refers to ensuring that physical exercisers do not appear or try to avoid sports injury accidents during sports activities, which is the first principle of physical fitness. People of different ages, sexes and physical functions should follow the principle of safety in the whole process of participating in sports activities.

Second, the principle of all-round development.

All-round development refers to improving the functional level of various parts of the body and organ systems during exercise.

The all-round development of physical function is not only reflected in improving cardiopulmonary function and immunity, but also in improving aerobic exercise ability, muscle strength, flexibility and other physical qualities. To achieve the effect of all-round development, we should choose sports in which the main muscle groups of the whole body participate, such as running, swimming and ball games.

Third, the overload principle.

Overload principle means that the exercise load of human body should be increased continuously in the process of physical exercise. Excess recovery is the theoretical basis of overload principle. After a period of physical exercise, physical function and athletic ability can exceed the previous level in a certain period of time, which is called excessive recovery. In exercise, only by constantly surpassing the previous exercise load can we continuously improve our physical function and athletic ability.

Fourth, the principle of gradual progress.

If the overload principle is understood as increasing the intensity and amount of exercise continuously, then the gradual principle is to increase the intensity and time of exercise scientifically and step by step. The principle of gradual progress emphasizes gradually increasing the exercise load according to the individual's adaptability to exercise, so as to improve the body function steadily. In the process of physical exercise, the improvement of human function needs a certain process. Therefore, exercise and fitness should not be rushed for success, but should be gradually improved. It is necessary to ensure that the energy consumed by the body during exercise is restored, physical fatigue is eliminated, and physical function is fully restored to the level of excessive recovery.

Five, the principle of specialization

The principle of specialization refers to the selection of special exercise content, the formulation of physical fitness programs and the arrangement of sports activities according to the purpose of physical exercise. In other words, if you want to improve something, you should specialize in it. If the purpose of physical exercise is to improve strength, choose strength exercise. If you want to improve aerobic exercise ability, choose running and aerobic exercise.

Sixth, the principle of individuality.

The principle of individuation refers to making exercise and fitness programs according to everyone's genetic characteristics, functional characteristics and exercise habits. When making a fitness plan, it is necessary to carry out necessary medical examination and exercise ability test in order to understand everyone's specific situation and make the fitness plan more personalized.

Extended data:

Post-exercise principle:

1, supplement liquid food after exercise

If juice, porridge, soup, and fruits and vegetables with more water (such as tomatoes, grapes, oranges, watermelons, lettuce, cucumbers). These liquid foods contain a lot of water and vitamins, which help the body to be replenished quickly.

2. Potash-containing foods and vitamins

Potatoes, bananas, oranges, orange juice and raisins are rich in potassium and vitamins B and C, which are helpful to deal with the accumulated metabolites in the human body as soon as possible, so eating foods rich in vitamins B and C can eliminate fatigue.

People's Network-These principles of less exercise are harmful to health.