The main purpose of participating in physical exercise is to exercise and enhance physical fitness. However, to achieve this goal, we must pay attention to science. Only by exercising in a scientific way can we achieve the expected exercise effect. In order to better exercise and achieve the purpose of enhancing physical fitness, the following principles should be followed.

First, the principle of conscious enthusiasm

The principle of conscious enthusiasm means that physical exercisers have clear fitness goals, fully understand the value of physical exercise and actively engage in physical exercise activities. Physical exercise is a process of self-exercise and self-improvement, which needs to overcome its own inertia and various difficulties. At the same time, it is necessary to have a certain work and rest system as a guarantee and take physical exercise as an indispensable part of life in order to be effective.

Second, the principle of pragmatic.

The principle of stressing practical results means that when choosing exercise content, methods and arranging exercise load, it should be determined according to the actual situation of individual's gender, age, occupation, health status, hobbies, requirements, original foundation and living conditions, and the best exercise effect can be obtained by exercising in accordance with scientific methods.

Third, the principle of perseverance.

The principle of perseverance means that physical exercise must be carried out regularly, making it an important content in daily life. Physical exercise stimulates the body, and each stimulation produces certain traces of action, while continuous stimulation produces traces of accumulation. This accumulation makes the structure and function of the body adapt to the new situation, the physique will continue to strengthen, and the conditioned reflex of motor skills will also continue to strengthen. Therefore, it is very important to insist on physical exercise. It is impossible to expect to achieve remarkable results in a short time, and it must be accumulated for a long time.

Fourth, the principle of gradual progress.

The principle of gradual progress means that physical exercise must follow the basic laws of natural development and adaptation of human body, reasonably arrange the exercise load from different subjective and objective realities, and improve the exercise level on the basis of gradual progress. In the process of physical exercise, the magnitude of exercise load directly affects the change of human function, and whether the load is appropriate plays a great role in the quality of exercise effect. The magnitude of exercise load varies from person to person and from time to time. Even the same person, in different functional States and at different times, the human body's ability to bear the load is different. Therefore, physical exercise should be gradual, adjust the exercise load at any time, and gradually improve the level of exercise.

Verb (abbreviation of verb) principle of comprehensiveness

The principle of comprehensiveness means that physical exercise must pursue the all-round and harmonious development of body and mind, so as to make the body shape, function, physical quality and psychological quality develop in an all-round and coordinated way. The human body is a whole composed of all parts, and all parts develop according to the law of "using in and discarding out". Physical exercise can promote the general exuberance of metabolism, coordinate the development of various systems, tissues and organs of the body, and achieve relative perfection and perfection of the body.