Kinetic changes with fatigue and relationship to injury in female runners
Kinetic changes with fatigue and relationship to injury in female runners
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DOI：
10.1249/01.mss.0000158994.29358.71
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发表时间：
2005-04-01
期刊：
影响因子：
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通讯作者：
Horvath, PJ
中科院分区：
文献类型：
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作者：
Gerlach, KE;White, SC;Horvath, PJ
目的：本研究探讨女性跑者在力竭跑台跑后，地面反作用力（GRF）随疲劳的变化。一项独立的回顾性和前瞻性分析将GRF的初始幅度和疲劳引起的GRF变化与下肢损伤相关。方法：90名成年女性跑步者在力竭性跑台跑之前和之后进行了垂直GRF测量。受试者最初被问及以前的跑步伤害，并在第二年联系，并要求报告盟友额外的跑步伤害。结果如下：疲劳引起的力竭跑导致在所有跑步者的冲击峰值和负荷率下降，平均分别为6%和11%。GRF的变化归因于跑步节奏、步长和下肢关节运动学的改变。目前还不清楚这些变化是跑步者试图最大限度地减少冲击力和保护免受伤害，还是代表疲劳引起的最佳表现能力的丧失。观察到前一年受伤与疲劳冲击载荷率变化之间的相互作用，表明以前受伤的跑步者随着时间的推移会受到相对较高的冲击力。结论：女跑运动员在疲劳状态下，其跑姿会发生变化，从而导致GRF的改变。疲劳时GRF的变化可能与下肢跑步损伤有关。
Purpose: This research examined how ground reaction forces (GRF) changed with fatigue induced by an exhaustive treadmill run in female runners. A separate retrospective and prospective analysis correlated initial magnitude of GRF and fatigue-induced changes in GRF with lower-extremity injury. Methods: Ninety adult female runners had vertical GRF measured before and after an exhaustive treadmill run. Subjects initially were questioned about previous running injuries, and were contacted during the following year and asked to report ally additional running injuries. Results: Fatigue induced by the exhaustive treadmill run resulted in decreased impact peak and loading rates in all runners by an average of 6 and 11%, respectively. The changes in GRF were attributed to altered running cadence, step length, and lower-extremity joint kinematics. It is unclear whether these changes were attempts by the runners to minimize impact forces and protect against injury, or represented a fatigue-induced loss of optimal performance capabilities. An interaction between injury in the previous year and change in impact loading rate with fatigue was observed, suggesting previously injured runners are exposed to relatively higher impact forces over time. Conclusion: Habitual female runners appear to adapt their running style with fatigue, resulting in altered GRF. Changes in GRF with fatigue may be associated with lower-extremity running injuries.