Right hand technique required for shooting in kyudo

This study aimed to clarify the kyudo technique required to prevent "yurumi" and minimize the misalignment of the right fist, focusing on the "hineri" movement in "kai", the extension of the right elbow in "zanshin", and the movement of the right thumb when shooting, thereby contributing to a better hit rate.The subjects were 8 male university kyudo athletes.In experiment 1, the activities of the right pronator teres and the right triceps brachii were measured using surface EMGs, and analyzed.In experiment 2, the movements of the right thumb and the right fist were filmed using a high-speed camera, and analyzed.This analysis yielded the following 3 findings.1)To prevent "yurumi", the "hineri" movement should be strengthened from "hikiwake" to "kai".2)To prevent "yurumi", the extension of the right elbow should be strengthened during "zanshin".3)To keep the misalignment of the right fist small and constant, the MP joint of the right thumb should be extended when shooting.