Preparatory co-activation of the ankle muscles may prevent ankle inversion injuries.
Preparatory co-activation of the ankle muscles may prevent ankle inversion injuries.
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DOI：
10.1016/j.jbiomech.2016.11.002
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发表时间：
2017-02-08
影响因子：
2.4
通讯作者：
Delp SL
中科院分区：
文献类型：
--
作者：
DeMers MS;Hicks JL;Delp SL
踝关节内翻扭伤是体力活动中最常见的急性肌肉骨骼损伤。重新训练肌肉协调的干预措施帮助恢复了受伤的脚踝，但目前尚不清楚哪些肌肉协调策略(如果有的话)可以预防脚踝扭伤。这项研究的目的是确定在模拟30度倾斜着陆时，脚踝肌肉的协调活动是否可以防止过度的脚踝内翻。我们使用了一组肌肉骨骼模拟来评估在模拟着陆场景中协调脚踝外翻肌和内翻肌的两种策略的有效性：计划的共同激活和具有生理延迟(60毫秒延迟)的伸展反射激活。着陆的全身肌肉骨骼模型被用来生成对象在每种协调条件下跌落到斜面上的模拟。在每种情况下，外向器和倒置器协同活动或伸展反射的强度都有系统的变化。模拟显示，在与地面接触之前，踝关节外翻肌和内翻肌的强烈准备共同激活，通过在初次接触后迅速产生外翻瞬间，防止了踝关节内翻超过受伤阈值。相反，在模拟达到内翻损伤阈值之前，拉伸反射太慢，不能产生外翻瞬间。这些结果表明，保护脚踝的训练干预应侧重于在着陆前通过肌肉共同激活来加强脚踝。肌肉骨骼模型、控制器、软件和模拟结果可以在http://simtk.org/home/ankle-sprains，网站上免费获得，使其他人能够复制结果并探索新的伤害情景和干预措施。
Ankle inversion sprains are the most frequent acute musculoskeletal injuries occurring in physical activity. Interventions that retrain muscle coordination have helped rehabilitate injured ankles, but it is unclear which muscle coordination strategies, if any, can prevent ankle sprains. The purpose of this study was to determine whether coordinated activity of the ankle muscles could prevent excessive ankle inversion during a simulated landing on a 30-degree incline. We used a set of musculoskeletal simulations to evaluate the efficacy of two strategies for coordinating the ankle evertor and invertor muscles during simulated landing scenarios: planned co-activation and stretch reflex activation with physiologic latency (60-millisecond delay). A full-body musculoskeletal model of landing was used to generate simulations of a subject dropping onto an inclined surface with each coordination condition. Within each condition, the intensity of evertor and invertor co-activity or stretch reflexes were varied systematically. The simulations revealed that strong preparatory co-activation of the ankle evertors and invertors prior to ground contact prevented ankle inversion from exceeding injury thresholds by rapidly generating eversion moments after initial contact. Conversely, stretch reflexes were too slow to generate eversion moments before the simulations reached the threshold for inversion injury. These results suggest that training interventions to protect the ankle should focus on stiffening the ankle with muscle co-activation prior to landing. The musculoskeletal models, controllers, software, and simulation results are freely available online at http://simtk.org/home/ankle-sprains, enabling others to reproduce the results and explore new injury scenarios and interventions.
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影响因子：
2.8
作者：
DeMers, Matthew S.;Pal, Saikat;Delp, Scott L.
通讯作者：
Delp, Scott L.
跑步过程中肌肉对推进和支撑的贡献。
影响因子：
2.4
作者：
Hamner, Samuel R.;Seth, Ajay;Delp, Scott L.
通讯作者：
Delp, Scott L.
影响因子：
2.4
作者：
BLANKEVOORT, L;KUIPER, JH;GROOTENBOER, HJ
通讯作者：
GROOTENBOER, HJ
影响因子：
3.3
作者：
Arnold, Brent L.;Linens, Shelley W.;Ross, Scott E.
通讯作者：
Ross, Scott E.
DOI：
10.1001/archfami.8.2.143
发表时间：
1999-03-01
期刊：
ARCHIVES OF FAMILY MEDICINE
影响因子：
--
作者：
Braun, BL
通讯作者：
Braun, BL