Shimotashiro Yusuke, Shinya Masahiro
Graduate School of Humanities and Social Sciences, Hiroshima University, Hiroshima, Japan.
Front Sports Act Living. 2024 Sep 13;6:1434096. doi: 10.3389/fspor.2024.1434096. eCollection 2024.
Shooting precision is a fundamental characteristic in soccer, yet the probabilistic structure and magnitude of precision in soccer shooting remain quantitatively unexplored. This study aimed to quantify shooting precision using measures derived from the bivariate normal distribution for both preferred and non-preferred feet. Sixteen right-footed collegiate soccer players participated by performing instep kicks aiming at targets which are placed close to the left and right top corners of the soccer goal. We used bivariate normal distribution modeled the ball positions, revealing an ellipsoidal distribution, and the area of the 95% confidence ellipses served as an index of precision. Repeated measures ANOVAs revealed a significant main effect of the kicking foot. For shots aimed at the same side as the kicking foot, the area of the 95% confidence ellipse was 6.17 ± 1.93 m (mean ± SD) for the preferred foot and 10.22 ± 3.53 m for the non-preferred foot. Similar results were observed for shots aimed at the opposite side of the kicking foot. These quantitative findings hold promise for advancing soccer research and enhancing practical applications in soccer skill assessment.
射门精度是足球运动的一项基本特征，但足球射门精度的概率结构和量级在数量上仍未得到充分研究。本研究旨在使用从双变量正态分布得出的测量方法，对惯用脚和非惯用脚的射门精度进行量化。16名右足的大学足球运动员参与了实验，他们用脚背进行射门，目标是放置在足球球门左右上角附近的目标。我们使用双变量正态分布对球的位置进行建模，揭示了一种椭圆形分布，95%置信椭圆的面积作为精度指标。重复测量方差分析显示了踢球脚的显著主效应。对于踢向与踢球脚同侧的射门，惯用脚的95%置信椭圆面积为6.17±1.93米（平均值±标准差），非惯用脚为10.22±3.53米。对于踢向与踢球脚异侧的射门，也观察到了类似的结果。这些定量研究结果有望推动足球研究的发展，并加强足球技能评估中的实际应用。
