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首页> 外文期刊>Clinical journal of sport medicine: official journal of the Canadian Academy of Sport Medicine >Ankle Kinematics and Muscle Activity in Functional Ankle Instability
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Ankle Kinematics and Muscle Activity in Functional Ankle Instability

机译：踝运动学和功能性踝关节不稳中的肌肉活动

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OBJECTIVE:: Following an ankle injury, many patients have functional ankle instability (FAI) with an increased predisposition to reinjury. The purpose of this study was to assess the effects of FAI on ankle kinematics and muscle activity during a lateral hop movement. DESIGN:: Cross-sectional and observational study; all data collection for each subject was performed on 1 day. SETTING:: Clinical biomechanics laboratory. PATIENTS:: Two groups were studied: (1) Control group-no ankle injury (n = 12), and (2) FAI group (n = 12). INTERVENTIONS:: The lateral hop movement consisted of multiple lateral and medial 1-legged hops over an obstacle (width, 72.5 cm; depth, 25.5 cm; height, 14.3 cm) onto adjacent force platforms. Each subject was instructed to perform as many lateral hops as possible during the 6-second trial. Means, SDs, 95% confidence intervals of the differences, and P-values were calculated. MAIN OUTCOME MEASURES:: Ankle kinematics and muscle activity throughout the lateral hop movement. RESULTS:: Significant differences existed between groups for mean (SD) dorsiflexion ankle positions-FAI 82.4 degrees (6.4) versus normal 75.2 degrees (10.1) and tibialis anterior normalized muscle activity-FAI 0.27 (0.21) versus normal 0.16 (0.13) at ground contact. CONCLUSIONS:: The FAI group revealed greater tibialis anterior muscle activity and dorsiflexion ankle position at contact moving in the lateral direction. These differences between groups may have been related to an inherent predisposition to ankle injuries, a preexisting difference in task performance, a consequence of injuries, or a compensatory adaptation to previous injuries.
机译：目的：踝关节损伤后，许多患者患有功能性踝关节不稳（FAI），易受伤的可能性增加。这项研究的目的是评估侧跳运动过程中FAI对踝关节运动学和肌肉活动的影响。设计：：横断面和观察性研究;每个对象的所有数据收集均在1天进行。地点：临床生物力学实验室。患者：：研究了两组：（1）对照组-无踝关节损伤（n = 12），以及（2）FAI组（n = 12）。干预：侧向跃点运动包括越过障碍物（宽度72.5厘米;深度25​​.5厘米;高度14.3厘米）到相邻的受力平台上的多个外侧和内侧1足跳。在6秒的试验中，指示每个受试者执行尽可能多的横向跳跃。计算平均值，标准差，差异的95％置信区间和P值。主要观察指标：整个侧跳运动中踝关节运动学和肌肉活动。结果：平均水平（SD）背屈踝关节位置-FAI 82.4度（6.4）与正常75.2度（10.1）和胫骨前标准化肌肉活动-FAI 0.27（0.21）与正常0.16（0.13）之间存在显着差异联系。结论：FAI组在侧向移动接触时显示出更大的胫骨前肌活动和背屈踝位置。两组之间的这些差异可能与脚踝受伤的固有易感性，工作表现的预先存在的差异，受伤的结果或对先前受伤的补偿性适应有关。

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