SWING MECHANICS OF COLLEGIATE BASEBALL PLAYERS IN DIFFERENT BATTING HEIGHT

Abstract

The purpose of this study was to understand the batting stability of baseball player in different divisions during three batting height. Eight division I and eight division II baseball players served as the subjects in this study. The 3D motion analysis system was used to collect the kinematics data. The swing plane was calculated and the error between the trajectory and the plane was considered as outcomes. Two-way mixed design ANOVA (? = .05) was used for statistics. Dbh were smaller in low (79.79±54.05) than that in high (160.80±98.35, p= .001) and middle (150.58±67.07, p= .000) batting conditions. Dsholder in low (4.72±3.01) was smaller than middle (16.04±7.21, p= .006) and high (16.04±7.21, p= .000) conditions, and Dsholder in middle was smaller than high (p= .001) condition. From the point of view of deviation of bat head and shoulder, the swing performents were more stable in low condition than other conditions.