Primary Comprehension of Three Theoretical Systems of China's Sports Training Principles

In China,principles of sports training are changing with the development of sports training practice,meanwhile,they are better and improved constantly based on the accumulation of the training practical experiences.At present, there are three theoretical systems in principles of China's sports training: 1.Pedagogical training principle system;2.three requirements and heavy loadtraining principle system;3.Discriminating training principle system.This paper expounds the development and improvement of the three theoretical systems of sports training at different angles.