【Summary】 This book details coaching methods based on the analysis of baseball players' movements. In particular, it explains how to move the body correctly based on the 4-stance theory, contributing to the improvement of players' performance. 【About the Author】 The author, Soichi Hiroto, has extensive experience as a sports instructor and possesses specialized knowledge regarding how athletes use their bodies. His theory is supported by many athletes. 【Target Audience】 This book is a very useful resource for baseball players, coaches, and those interested in sports. By learning the correct way to use the body, it helps to improve athletic ability. - Title: 4-Stance Theory Bible - ISBN: 978-4-08-331195-5 - Content: Information on the analysis of baseball players' movements and coaching methods - Author: Soichi Hiroto Please note that there are markings with a red pen. Thank you for looking.