Reaction speed exercises and eye-hand coordination on the gyaku zuki chudan punch speed

Abstract

An Athletes thought process in coordinating the sensory system and motor system can be assessed by reaction time. At hand reaction time, good visual and motor hand coordination will provide a quick response to hand movements, Good reaction time is very important in karate, as it allows early identification of an opponent's body movement or attack which allows decisive or evasive action to be taken if necessary. The aim of this study is to examine how two types of reaction speed exercises, modified directional hand movement and ball release with eye-hand coordination as an attribute variable, affect gyaku zuki chudan punch speed. The method utilized in this study was an experiment with a treatment design by level 2 x 2 on 111 junior karate athletes aged 16-17 years in Bekasi, Indonesia. This study used a random selection approach to choose 60 persons, who were then separated into four groups. This study's device for measuring gyaku zuki chudan punch speed was punching speed test. Meanwhile, the ball-catching was used as an eye-hand coordination test tool. The results show that the modified directional hand movement exercise has a greater effect than ball release on the gyaku zuki chudan punch speed. There is an interaction between reaction speed and eye-hand coordination exercises on the gyaku zuki chudan punch speed. That athletes who have high eye-hand coordination are better if they are trained with modified directional hand, and athletes who have low eye-hand coordination are better if they are trained with ball release. So that the gyaku zuki chudan punch technique training program determined by the modified directional hand movement and ball release exercise.