2.
The principle of stressing practical results means that one's sex and age should be taken into account when choosing exercise content, methods and arranging exercise load. ...
3.
Perseverance principle Perseverance principle means that physical exercise must be carried out frequently, making it an important content in daily life. sports ...
4.
The principle of step by step The principle of step by step means that physical exercise must follow the basic laws of the natural development and adaptation of the human body, from different ...