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首页> 外文期刊>Journal of Biomechanics >Kinetic asymmetry in female runners with and without retrospective tibial stress fractures
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Kinetic asymmetry in female runners with and without retrospective tibial stress fractures

机译：伴或不伴回顾性胫骨应力性骨折的女子赛跑运动员的运动不对称性

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Gait asymmetry may be linked to the tendency for runners to sustain chronic overuse injuries. This paper compares gait asymmetry in female runners who have never sustained a running-related injury to those who have sustained unilateral tibial stress fractures. The symmetry index was used to characterize asymmetry in the kinetics of both subject groups. There were three aims to this study: (1) to report natural levels of asymmetry for healthy, never-injured female runners, (2) to compare asymmetry levels between never-injured runners and those who have sustained stress fractures, and (3) to examine the kinetics between the involved and uninvolved limbs of runners who have sustained stress fractures. In all three aims, peak medial, lateral, braking, vertical impact, and vertical ground reaction forces, average and peak instantaneous vertical loading rates, and peak shock were examined. In the never-injured runner group, natural levels of asymmetry ranged from 3.1% for peak vertical ground reaction force up to 49.8% for peak lateral ground reaction force. Symmetry indices were not significantly different in the runners who had previously sustained stress fractures. The involved limb of the previously injured runners demonstrated higher values for braking and vertical impact ground reaction force and peak shock. Interestingly, these runners appeared to have bilaterally-elevated lateral ground reaction forces and loading rates as compared to the never-injured group, although this was not statistically tested. This suggests that previously injured runners may be closer to the injury threshold and, thus, more susceptible. Asymmetry may simply influence the side on which they become injured. (c) 2005 Elsevier Ltd. All rights reserved.
机译：步态不对称可能与跑步者遭受长期过度使用伤害的趋势有关。本文比较从未遭受跑步相关伤害的女性跑步者与遭受单侧胫骨应力性骨折的女性的步态不对称性。对称指数用于表征两个受试者组动力学的不对称性。这项研究的三个目标是：（1）报告健康，从未受伤的女跑步者的自然不对称水平;（2）比较从未受伤的跑步者和患有持续性应力骨折的跑步者之间的不对称水平;以及（3）检查患有持续性应力骨折的跑步者的受累和未受累肢体之间的动力学。在所有这三个目标中，检查了峰值内侧，横向，制动，垂直冲击和垂直地面反作用力，平均和峰值瞬时垂直载荷率以及峰值冲击。在从未受伤的跑步者组中，自然不对称程度从峰值垂直地面反作用力的3.1％到峰值水平地面反作用力的49.8％不等。先前经历过应力性骨折的跑步者的对称指数没有显着差异。先前受伤的跑步者的受累肢体显示出更高的制动和垂直冲击地面反作用力以及峰值冲击值。有趣的是，与未受伤的组相比，这些运动员似乎具有双向升高的侧向地面反作用力和负荷率，尽管未进行统计检验。这表明先前受伤的跑步者可能更接近受伤阈值，因此更容易受到伤害。不对称可能会简单地影响他们受伤的那一侧。 （c）2005 Elsevier Ltd.保留所有权利。

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