２地区中学生の野球障害に関する調査

Abstract

We investigated the frequency of joint disorders among middle school baseball players, analyzing the number of baseball matches, they played and the type of class 1st or 2nd year in two defferent districts. We selected two distrcts that each had either fifty matches (two teams) or twenty-five matches (four teams). 59 players were examined in the group playing 50 matches, and 95 players in the teams playing 25 matches. We also analyzed the groups according to 1st or 2nd year classes and generally, it seems that 2nd year class members suffered from more disorders compared to the 1st year class members. This was especially true for 2nd year class members who belonged to the group which played 50 baseball matches, and the disorders were particularly prebalent in their shoulders. Disorders were also more common in pitchers and catchers playing 50 games, and in the fielders who played less matches.In conclusion, there was little difference between the two districts in regard to training time, in the degree and site of disorders. However it was clear that there were more shoulder disorders in 2nd year class members who played more matches and also in shoulders and elbows of pitchers.