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首页> 外文期刊>Journal of Biomechanics >Free moment as a predictor of tibial stress fracture in distance runners
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Free moment as a predictor of tibial stress fracture in distance runners

机译：自由力矩作为长跑运动员胫骨应力骨折的预测因子

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摘要

Stress fractures are a common and serious overuse injury in runners, particularly female runners. They may be related to loading characteristics of the lower extremity during running stance. Some tibial stress fractures (TSFs) are spiral in nature and, therefore, may be related to torque. Free moment (FM) is a measure of torque about a vertical axis at the interface with the shoe and ground. Increases in FM variables may be related to a history of TSF in runners. The purpose of this cross-sectional study was to investigate differences in FM between female distance runners with and without a history of TSF and, additionally, to investigate the relationship between absolute FM and the occurrence of TSF. A group of 25 currently uninjured female distance runners with a history of TSF (28 +/- 10 years, 46 +/- 15 km week(-1)) and an age- and mileage-matched control group of 25 healthy runners with no previous lower extremity fractures (26 +/- 9 years, 46 +/- 19 km week(-1)) participated in this study. Ground reaction forces and foot placement on the force platform were recorded during running at 3.7m s(-1) (+/- 5%). Peak adduction, braking peak and absolute peak FM and impulse were compared between groups using one-tailed t-tests. The predictive value of absolute peak FM was investigated via a binary logistic regression. All variables, except impulse, were significantly greater in runners with a history of TSF. Absolute peak FM had a significant predictive relationship with history of TSF. There is a significant relationship between higher values for FM variables and a history of TSF. (c) 2005 Elsevier Ltd. All rights reserved.
机译：应力性骨折是跑步者，尤其是女子跑步者中常见且严重的过度使用伤害。它们可能与跑步姿势下肢的负荷特征有关。一些胫骨应力性骨折（TSF）本质上是螺旋形的，因此可能与扭矩有关。自由力矩（FM）是在与鞋子和地面的界面处围绕垂直轴的扭矩的量度。 FM变量的增加可能与跑步者TSF的病史有关。这项横断面研究的目的是调查有无TSF历史的女子长跑运动员之间FM的差异，此外，还研究绝对FM与TSF发生之间的关系。一组25名目前未受伤的女子长跑运动员，有TSF病史（28 +/- 10岁，46 +/- 15 km周（-1）），以及年龄和里程匹配的对照组25名健康运动员，没有先前的下肢骨折（26 +/- 9年，46 +/- 19 km周（-1））参加了这项研究。记录了在3.7m s（-1）（+/- 5％）运行期间的地面反作用力和脚在受力平台上的放置情况。使用单尾t检验比较两组之间的峰值内收，制动峰值，绝对峰值FM和脉冲。通过二元逻辑回归研究了绝对峰值FM的预测值。具有冲动史的跑步者，除冲动外，所有变量均显着增加。 FM的绝对峰值与TSF的病史有显着的预测关系。 FM变量的较高值与TSF的历史之间存在显着的关系。 （c）2005 Elsevier Ltd.保留所有权利。

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