자연과학편 : 야구선수들의 견관절 등속성 근 기능과 볼 스피드와의 상관관계 분석 = The correlation between isokinetic muscular function of shoulder joint and ball speed in amateur baseball players

다국어 초록 (Multilingual Abstract)

The purpose of this study is to diagnose the Relation of Pitcher's Ball Speed with peak torque internal and external rotation of shoulder using Isokinetic dynamometer. The subjects for this study were 6 specialized pitchers and 6 fielders of baseball players and 7 pitchers who are baseball players as high school students for further inspection. Concerning the seated posture on Biodex and the D2 diagonal-throwing pattern motion, internal and external rotation and flexion and extension of shoulder joint were measured. And the measurement of ball speed was performed by 5 times by using of speed gun and then finally the highest ball speed of them was selected. Measured all data were analyzed by using of SPSS Ver. 10.0, the correlation analysis of ball speed with this measuring variables was analyzed by Pearson correlation, and the stepwise multiple regression analysis to predict the relation ball speed to measuring variables and T-test was performed. The result of this study was that in measuring peak torque of shoulder rotation of pitchers and fielders groups with all seated Modified neutral posture, only the group of pitchers showed the factors which had influence on ball speed in measuring ball speed, peak torque of shoulder rotation and in the posture of D2(standing), both pitchers and fielders groups had not variables which showed the significant relation with ball speed. In addition, the expression of estimated model can be originated for prediction of ball speed from these measuring variables like peak torque of shoulder rotation. Consequently, it is expected that the result of this study may be utilized as a basic data for the improvement of game performance ability of pitchers, the prevention from injury, and the rehabilitation practice applied by predicting the ball speed by muscular strength on the basis of the relations of relation of pitcher's ball speed with peak torque internal and external rotation of shoulder using Isokinetic dynamometer.

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