Biomechanical factors associated with tibial stress fracture in female runners
Biomechanical factors associated with tibial stress fracture in female runners
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DOI：
10.1249/01.mss.0000183477.75808.92
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发表时间：
2006-02-01
期刊：
影响因子：
--
通讯作者：
Davis, IS
中科院分区：
文献类型：
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作者：
Milner, CE;Ferber, R;Davis, IS
目的：胫骨应力性骨折(TSF)是最严重的跑步损伤之一，通常需要6-8周才能恢复。这项横断面研究旨在确定有过TSF病史的训练有素的长跑运动员和那些从未经历过骨折的长跑运动员在结构和跑步力学方面是否存在差异。方法：研究对象为18~45岁、跑中心点wk(-1)至少32公里、后脚着地的女性跑步者。这项研究的参与者是20名有TSF病史的受试者和20名年龄和里程匹配的对照组受试者，这些受试者之前没有下肢骨损伤。运动学和运动学数据收集在3.7m中心点S(-1)地面跑步过程中，使用六摄像头运动捕捉系统、力平台和加速度计。感兴趣的变量包括垂直冲击峰值、瞬时和平均垂直负荷率、刹车过程中的瞬时和平均负荷率、膝关节屈曲偏移、踝关节和膝关节僵硬以及胫骨峰值冲击。站立时测量胫骨内翻。胫骨面积转动惯量是通过对跑步者子集的胫骨X光研究计算出来的。结果：TSF组的瞬时垂直负荷率、平均垂直负荷率和胫骨震荡均显著高于对照组。在70%的病例中，胫骨休克的程度成功地预测了群体成员。结论：这些数据表明跑步者的TSF病史与动态负荷相关变量的增加有关。
Purpose: Tibial stress fractures (TSF) are among the most serious running injuries, typically requiring 6-8 wk for recovery. This cross-sectional study, was conducted to determine whether differences in structure and running mechanics exist between trained distance runners with a history of prior TSF and those who have never sustained a fracture. Methods: Female runners with a rearfoot strike pattern, aged between 18 and 45 yr and running at least 32 km center dot wk(-1), were recruited for this study. Participants in the study were 20 subjects with a history of TSF and 20 age and mileage-matched control subjects with no previous lower extremity bony injuries. Kinematic and kinetic data were collected during overground running at 3.7 m center dot s(-1) using a six-camera motion capture system, force platform, and accelerometer. Variables of interest were vertical impact peak, instantaneous and average vertical loading rates, instantaneous and average loading rates during braking, knee flexion excursion, ankle and knee stiffness, and peak tibial shock. Tibial varum was measured in standing. Tibial area moment of inertia was calculated from tibial x-ray studies for a subset of runners. Results: The TSF group had significantly greater instantaneous and average vertical loading rates and tibial shock than the control group. The magnitude of tibial shock predicted group membership successfully in 70% of cases. Conclusion: These data indicate that a history of TSF in runners is associated with increases in dynamic loading-related variables.