Development of type classification system based on weight transfer for sports training

The 4-stance theory is a method of classifying types of sports training according to the way humans shift their weight. According to the types classified based on the 4-stance theory, the best weight-shifting method for each sport is proposed and actually trained. There are examples of applications in various sports such as baseball, golf, and tennis. Conventional type classification for sports training has the problem of inducing contradictory judgments because the definition of the type is ambiguous or judged only by looking at the form of the exercise. Therefore, in this paper, we focused on the center-of-gravity shift of the feet, which is the keystone of the 4-stance theory. Using a device that measures the center of gravity shift of both feet, we developed a device that can easily classify the type by simply performing basic simple movements.