摘要：This study aimed to analyze the Lower Quarter Y Balance Test (Y-BT) reliability in prepubescent male soccer players,as well as the relation between this dynamic balance test performance and some anthropometric parameters. In a field testing,104 prepubescent male soccer players (mean ± SD: age: 12.03 ± 1.81 year;Weight: 43.48 ± 10.39 kg;Stature: 154.14 ± 12.44 cm;Maturity offset: -2.40 ± 1.21) volunteered for this study. In this study,the Y-BT outcome measures were expresses as the composite scores for dominant and nondominant legs. The study was performed in two stages. In the first stage was investigated the reliability of the YBT,using a test-retest method. The Y-BT test and retest were performed,one week apart at the same time of day and on the same day of the week. The Intraclass Ccorrelation Coefficient (ICC(3.1)) was used for the analysis of relative reliability. Absolute reliability was analysed using 95% limits of agreement (LOA) and the standard error of measurement (SEM). In the second stage of the study,linear relations between Y-BT and age,stretch stature,body mass and sitting height,were investigated. Multiple linear regressions with backward method were used to test the relationship between the Y-BT and the explanatory variables. The reliability of the Y-BT was good,with an ICC(3.1) > 0.90,a SEM% < 5% and 95% LOA of -0.003 ± 1.32 % and -0.23± 1.37 % for dominant and non-dominant leg,respectively and talked about influence of anthropometric variables on Y-BT. Significant correlations were found between Y-BT,stature and leg length for both legs. Thus,Y-BT is a reliable tool for measuring dynamic balance,and its performance is anthropometric dependant in prepubescent soccer players.
