The influence of different playing surfaces on the biomechanics of a tennis running forehand foot plant
The influence of different playing surfaces on the biomechanics of a tennis running forehand foot plant
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DOI：
10.1123/jab.22.1.14
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发表时间：
2006-02-01
影响因子：
1.4
通讯作者：
Dixon, SJ
中科院分区：
文献类型：
--
作者：
Stiles, VH;Dixon, SJ
研究表明，在运动中使用人造表面所产生的强烈冲击、关节运动模式的改变以及摩擦系数的变化会增加过度使用损伤的发生率。本研究的目的是（a）开发程序，以评估网球运动的具体，（B）的地面反作用力（GRF）的运动的影响阶段的特点，和（c）评估人类的反应，在影响与常见的游戏表面的变化。关于第三个目的，假设具有最大机械缓冲的表面将产生较低的冲击力（PkFz）和加载速率。六名穿鞋的志愿者在每种表面条件下进行了8次跑步试验：基线，地毯，丙烯酸和人造草坪。每次试验同时收集测力板（960 Hz）和运动学数据（120 Hz）。运行中的单足植物通常在离足峰值之前的垂直GRF中具有3个峰值。与其他三个测试表面相比，基线表面上的组平均PkFz显著较低，峰值制动力显著较高（p < 0.05）。未发现初始运动学的显著变化来解释意外的PkFz结果。与其他三个测试表面相比，基线表面产生显著更高的摩擦系数（p < 0.05）。虽然这一假设被拒绝，生物力学分析表明，表面类型的变化与GRF变量。
Research suggests that heightened impacts, altered joint movement patterns, and changes in friction coefficient from the use of artificial surfaces in sport increase the prevalence of overuse injuries. The purposes of this study were to (a) develop procedures to assess a tennis-specific movement, (b) characterize the ground reaction force (GRF) impact phases of the movement, and (c) assess human response during impact with changes in common playing surfaces. In relation to the third purpose it was hypothesized that surfaces with greatest mechanical cushioning would yield lower impact forces (PkFz) and rates of loading. Six shod volunteers performed 8 running forehand trials on each surface condition: baseline, carpet, acrylic, and artificial turf. Force plate (960 Hz) and kinematic data (120 Hz) were collected simultaneously for each trial. Running forehand foot plants are typically characterized by 3 peaks in vertical GRF prior to a foot-off peak. Group mean PkFz was significantly lower and peak braking force was significantly higher on the baseline surface compared with the other three test surfaces (p < 0.05). No significant changes in initial kinematics were found to explain unexpected PkFz results. The baseline surface yielded a significantly higher coefficient of friction compared with the other three test surfaces (p < 0.05). While the hypothesis is rejected, biomechanical analysis has revealed changes in surface type with regard to GRF variables.