1, content coverage: The content of the aftersound version is relatively wider, covering not only the basic knowledge and theory of the ordinary version, but also more in-depth research results, the latest research methods and technologies, as well as some frontier fields, so that readers can understand and master all aspects of sports training more comprehensively.

2. Research methods and techniques: Yu Yinban covers more research methods and techniques, introduces some advanced experimental design, data analysis and result interpretation methods, and the application of some advanced sports training equipment and tools. This enables readers to know more about how to carry out scientific and effective sports training methods and skills.