유도 맞잡기 타입에 따른 기울이기 시 상지의 근 활동 분석

Abstract

The purpose of this study was to analyse muscle activities of upper extremity during Kuzushi(balance-breaking) by two types of Kumikata(engagement positioning) when performing Uchimata(inner thigh reaping thraw) in Judo. The subjects, who were five experts and five beginners in trainee in Judo. Type 1 is that one hand(Tsurite, lifting hand) grabbing a collar of Judo uniform and the other hand(Hikite, pulling hand) grabbing a sleeve of the opposite trainee, and Type 2 is that one hand(Tsurite, lifting hand) grabbing a collar around a posterior neck and the other hand grabbing a sleeve of the opposite Uke(defender). EMG recorded bilaterally muscle activities from seven surface EMG(Noraxon) electrodes on Deltoideus, Trapezius, Biceps brachii, Triceps brachii, Latissimus dorsi, Brachiioradidlis and Flexor carpiradialis muscles. From the data analysis and discussion, the following conclusions were drawn : When it comes to the leaning over, the skill for beginners of judo, the group of experts usually use Trapezius, Deltoideus, Biceps brachii, and Flexorcarpiradialis, and the group of beginners usually use Trapezius, Biceps Brachii, and Flexorcarpiradialis as main muscles for movement. In the types of the skill of lifting, the group of experts shows the similar condition of movement of muscles on the both right and left sides of the type 1 and 2. It is because experts use their muscles evenly and effectively through regular training. The group of beginners, however, has vigorous movements on the type 2, and it's because the group of beginners usually use muscles on the only one type. An amount of training for muscles on the upper limbs, therefore, is needed for the fast and accurate leaning over on Judo. Improvement especially on Trapezius, Latissimus dorsi, and Brachiioradialis, which can be easily overlooked, should be implemented.