Study on the influence of elastic Belt resistance training on the speed of young 400 meters athletes

400 meters athletes need to have a very high level of speed quality, recent years, the elastic band is used in various training projects due to its convenient and scientific training mode, but currently there are relatively few applications for young 400m athletes. Based on the speed training characteristics of the 400 meters race, this article designs an exercise plan in combination with elastic bands, and compares them with research methods such as literature, experiments, and logical analysis. Research shows that elastic band resistance training is effective and interesting to improve the 400 meters special performance, and can improve the enthusiasm of athletes in training.