Simpson K J, Shewokis P A, Alduwaisan S, Reeves K T
Biomechanics Laboratory, University of Georgia, Athens 30602.
Med Sci Sports Exerc. 1992 May;24(5):586-94.
Understanding the morphological, movement, and biomechanical characteristics that influence rearfoot motion during lateral movements is necessary for footwear design and for the determination of injury mechanisms. The purpose of this study was to identify factors related to rearfoot kinematics during a lateral braking movement. Seven highly skilled male tennis players performed 24 trials of side shuffle movements at various speeds. A rear view of the right leg performing a braking step onto a force platform was filmed. The neutral-O landing style was most commonly demonstrated. Average movement velocity, foot velocity at touchdown, and body mass were variables demonstrating weak or nonsignificant correlations with the rearfoot parameters. Although structural inversion was correlated significantly with the maximum rearfoot angle and velocity (r = -0.52 and -0.69), the results were affected by movement speed and sample size. The biomechanical characteristics displayed the greatest influence on the various rearfoot kinematic parameters. The magnitude of the significant (P less than 0.0001) correlations generally decreased in the following order: maximum horizontal and vertical force gradients, corresponding times to the maximum gradient values, maximum horizontal and vertical forces, and the corresponding times to maximum forces. In conclusion, the gradient-associated parameters were the most useful biomechanical parameters for predicting changes in rearfoot kinematics.
了解影响侧向运动中后足运动的形态、运动和生物力学特征，对于鞋类设计和损伤机制的确定是必要的。本研究的目的是确定与侧向制动运动中后足运动学相关的因素。七名技术高超的男性网球运动员以不同速度进行了24次侧步移动试验。拍摄了右腿在力平台上执行制动步骤的后视图。最常表现出中立 - O着陆方式。平均运动速度、触地时的足部速度和体重是与后足参数显示出弱或无显著相关性的变量。虽然结构内翻与最大后足角度和速度显著相关（r = -0.52和 -0.69），但结果受运动速度和样本量的影响。生物力学特征对各种后足运动学参数的影响最大。显著（P小于0.0001）相关性的大小通常按以下顺序降低：最大水平和垂直力梯度、达到最大梯度值的相应时间、最大水平和垂直力以及达到最大力的相应时间。总之，与梯度相关的参数是预测后足运动学变化最有用的生物力学参数。
