Initial Ball Flight Characteristics of Curve and Instep Kicks in Elite Women's Football
Initial Ball Flight Characteristics of Curve and Instep Kicks in Elite Women's Football
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DOI：
10.1123/jab.28.1.70
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发表时间：
2012-02-01
影响因子：
1.4
通讯作者：
Hunter, Adam
中科院分区：
文献类型：
--
作者：
Alcock, Alison;Gilleard, Wendy;Hunter, Adam
研究了曲线踢和脚背踢的初始球飞行特性。15名国际女子足球运动员在距离球门20米处和1米（2）的目标处进行了曲线和脚背踢。十七台Vicon摄像机跟踪了粘在球上的四个反射标记的三维坐标。对球的飞行特性进行量化，并记录球相对于目标中心的坐标。横向发射角度和旋转轴相对于水平的角度最好地预测了球相对于目标的水平位置。垂直发射角、前后速度和下旋量对垂直坐标有最好的预测作用。回归模型表明，必须仔细控制飞行特性，将发射角度限制在3度以内才能击中目标。曲线踢的特点是显着更大的横向和垂直发射角，增加侧旋和旋转的前后轴，和一个更垂直的旋转轴。这些信息有利于教练在训练球员时达到进球和避免防守墙所需的特征。例如，如果球员总是踢到高于或低于目标的位置，这些发现可以识别出有助于纠正错误的变量。
Initial ball flight characteristics of curve and instep kicks were investigated. Fifteen international female footballers performed curve and instep kicks from a distance of 20 m from goal and at a 1 m(2) target. Seventeen Vicon cameras tracked three-dimensional coordinates of four reflective markers adhered to the ball. Ball flight characteristics were quantified, and the coordinates of the ball relative to the target center were recorded. The lateral launch angle and the angle of the spin axis relative to the horizontal best predicted the horizontal placement of the ball relative to the target. The vertical launch angle, antero-posterior velocity and amount of backspin best predicted the vertical coordinate. Regression models demonstrated how carefully controlled the flight characteristics must be with launch angles constrained within 3 degrees to hit the target. Curve kicks were characterized by significantly greater lateral and vertical launch angles, increased sidespin and spin about the antero-posterior axis, and a more vertical spin axis. This information is beneficial for coaches in training players to achieve the characteristics required to score a goal and avoid a defensive wall. For example, if players consistently kick above or below the target, these findings identify the variables that will help rectify that error.