Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; The Hong Kong Jockey Club Sports Medicine and Health Sciences Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
Gait Posture. 2014 Jan;39(1):75-9. doi: 10.1016/j.gaitpost.2013.05.027. Epub 2013 Jun 27.
Knee stability during a functional assessment of the stop-jump task is a key factor to determine if an athlete is adequately rehabilitated after knee ligamentous injury. This study aimed to investigate knee stability due to the effect of anticipation on landing maneuvers during planned and unplanned stop-jump tasks. Knee kinematics of ten healthy male participants were collected using an optical motion analysis system during stop-jump tasks. Stop jumps were performed in four different landing positions either in planned movement or in an unplanned movement on a signal triggered as participants passed through a photocell gate. Kinematic data at the time of foot strike at landing in the stop-jump considered for investigating the anticipation effect during the stop-jump tasks. Two-way multivariate analysis of variance (MANOVA) with repeated measures and stratified paired t-tests were conducted to compare the knee kinematics data between planned and unplanned tasks. Statistical significance was set at the p<0.05 level. External rotational angle showed a significant decrease in unplanned stop-jump tasks during forward (p<0.05) and right (p<0.05) jumps when compared to that of planned tasks. Flexion angle and abduction angle during forward, vertical and right jumps were significantly decreased in the unplanned tasks. Anticipation significantly influenced the landing maneuvers of stop-jump task. The results indicated that both planned and unplanned stop-jump tasks should be considered when monitoring the rehabilitation progress after a ligamentous injury.
在停止跳跃任务的功能评估中，膝关节稳定性是确定运动员在膝关节韧带损伤后是否充分康复的关键因素。本研究旨在调查由于预期对计划和非计划停止跳跃任务中的着陆动作的影响，膝关节的稳定性。使用光学运动分析系统在停止跳跃任务中收集了十名健康男性参与者的膝关节运动学数据。停止跳跃在四个不同的着陆位置进行，要么是在计划运动中，要么是在参与者通过光电门时触发的非计划运动中。在停止跳跃任务中，考虑到在停止跳跃任务中进行预期效果的研究，在着陆时足部触地的时刻进行了运动学数据收集。进行了双向多元方差分析（MANOVA）与重复测量和分层配对 t 检验，以比较计划和非计划任务之间的膝关节运动学数据。统计显著性设置为 p<0.05 水平。与计划任务相比，在向前（p<0.05）和向右（p<0.05）跳跃时，非计划停止跳跃任务中外旋角度明显减小。向前、垂直和向右跳跃时的屈曲角度和外展角度在非计划任务中明显减小。预期显著影响停止跳跃任务的着陆动作。结果表明，在监测韧带损伤后的康复进展时，应同时考虑计划和非计划停止跳跃任务。
