대학야구선수의 Y Balance Test와 하지 가동성의 관계

Abstract

The purpose of this study is to present the Y Balance Test (YBT) profile of college baseball players and determine the relationship between YBT and ankle and hip mobility. The subjects of this study were 27 college baseball players. The dynamic balance ability of the lower extremities was measured using the YBT Kit. Ankle mobility was measured using the modified weight bearing lunge test(WBLT) and the non-weight bearing dorsiflexion(NWBD) range of motion(ROM) test. Hip mobility was measured for flexion and extension ROM. ROM was measured with passive ROM using a goniometer. The dynamic balance and mobility of the left and right lower extremities were compared using the paired-T test. The relationship between dynamic balance and mobility of the lower extremities was analyzed using Pearson’s correlation. The YBT results of college baseball players showed no significant difference between left and right(p＞.05). The lower extremity mobility of college baseball players was significant only in the NWBD ROM of the ankle(p=.012), and other variables were not significantly different(p＞.05). YBT right anterior reach had a significant correlation with WBLT right(r=.628, p=.000) and WBLT left(r=.507, p=.007). YBT left anterior reach had a significant correlation with WBLT right(r=.807, p=.000) and WBLT left(r=.691, p=.000). In addition, the YBT left posteromedial reach had a significant correlation with the right hip extension ROM(r=.394, p=.046). However, there was no significant correlation with other variables(p＞.05). Overall, the decrease in ankle mobility of college baseball players is related to the decrease in dynamic balance ability. In particular, the decrease in dorsiflexion mobility of the ankle in the weight-bearing lower extremity is related to the limitation of the anterior reach motion of the non-weight-bearing lower extremity. Therefore, it is recommended that college baseball players regularly evaluate their ankle mobility to improve dynamic balance ability and prevent injuries.