在体股后肌群最优长度测算方法的研究
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1.北京体育大学;2.南京体育学院;3.北卡罗来纳大学教堂山分校,美国 北卡罗来纳

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国家自然科学基金面上项目(81572212),中央高校基本科研业务费专项资金资助课题(2019PT015)


Study on calculation method of hamstring muscle optimal length in vivo
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1.Beijing Sport University;2.Nanjing Sport Institute;3.The University of North Carolina at Chapel Hill,USA

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    摘要:

    目的 建立测算在体股后肌群最优长度的方法,并与其它间接反映最优长度的指标进行对比。方法 通过同步采集屈膝过程的力矩和运动学数据,建立下肢骨骼肌肉模型,获得股后肌群的力量及肌肉长度,进而计算股后肌群各肌肉的最优长度。结果 最大屈膝力矩时的膝屈角显著大于股后肌群最大收缩力时的膝屈角,二者相关系数为0.741;股后肌群各肌肉的最优长度显著大于站立时的肌肉长度,且二者相关系数较低。 结论 本研究建立的测算在体股后肌群最优长度的方法,为今后明确股后肌群损伤机制和致伤危险因素的相关研究奠定了基础。在一定程度上,最大屈膝力矩时的膝屈角可以间接代表股后肌群最优长度。不建议将站立时的股后肌群长度代替股后肌群最优长度来使用。

    Abstract:

    Objective To build a method to calculate hamstring muscle optimal length in vivo, and compare with other indirect parameters which represent the optimal length. Methods The knee ?exion torque and kinematic data were synchronously recorded. Musculoskeletal model of lower limbs was built to obtain hamstring strength and muscle length, and then hamstring muscle optimal lengths were calculated. Results Knee flexion angle at peak knee flexion torque was signi?cantly greater than flexion angle at peak hamstring strength and the correlation coefficient between them was 0.741. Hamstring muscle optimal lengths were signi?cantly greater than corresponding mus-cle lengths in standing and the correlation coefficient between them were low. Conlusions The calculation method of hamstring muscle optimal length in this study sets a basis for future studies on injury mechanism and risk factors. Knee flexion angle at peak knee flexion torque could partly represent hamstring optimal length. Hamstring muscle length in standing should not be used as an approximation of hamstring optimal length.

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历史
  • 收稿日期:2019-09-29
  • 最后修改日期:2019-11-27
  • 录用日期:2019-12-03
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