神经肌肉疲劳前后运动鞋对下肢落地冲击的生物力学影响
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国家自然科学基金项目(11772201, 81572213),国家重点研发计划“科技冬奥”重点专项(2018YFF0300500,2019YFF0302100),上海市教委“曙光学者”计划(19SG47),上海市人才发展基金资助计划(2018107)


Biomechanical Effects of Shoe Cushioning on Lower Extremities during Drop Landing before and after Neuromuscular Fatigue
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    摘要:

    目的 探讨神经肌肉疲劳前后缓冲型运动鞋对落地动作下肢冲击力特征,以及对运动学和动力学的影响。方法 比较15名篮球专项运动员在疲劳干预前后,穿不同缓冲性能的运动鞋从60 cm高落地时的冲击力、负载率、下肢运动学、关节力矩、关节/下肢刚度等。结果 疲劳前高缓冲鞋仅使后跟处负载率峰值减小,且到达后跟负载率时间比对照组更短。疲劳后高缓冲鞋显著减小后跟处冲击力峰值、负载率峰值和前脚掌的负载率峰值,同时显著延长到达冲击力和后跟负载率峰值的时间;穿高缓冲鞋使得踝关节触地角度、最小角度显著增大。在下肢刚度、踝关节峰值力矩和刚度方面两组鞋并未发现显著性的改变。结论 在疲劳后,当人体下肢神经肌肉控制策略减弱时,高缓冲鞋能够有效地衰减冲击,进而有利于避免或减小潜在的冲击性运动损伤。

    Abstract:

    Objective To examine the effects of shoe cushioning on impact characteristics, kinematics and dynamics of lower extremities before and after neuromuscular fatigue during drop landing. Methods Fifteen trained male athletes were required to execute three successful trials of drop landing from a 60-cm platform before and after fatigue protocol. The impact force, loading rate, lower extremity kinematics, joint moment, joint stiffness were compared. Results Before fatigue, highly-cushioned shoes reduced the loading rate at heel before fatigue, and the time to peak loading rate of heel was significantly shorter than that of control shoes. After fatigue, highly-cushioned shoes significantly reduced the peak impact force and loading rate at heel, loading rate at forefoot. Meanwhile the time to peak impact force and peak loading rate at heel were significantly longer, and the contact and minimum angle of ankle were significantly greater. No significant changes were found in lower extremity stiffness, peak moment and joint stiffness of ankle. Conclusions In the situation where neuromuscular activity is reduced, highly-cushioned shoes can effectively attenuate the impact, thereby helping to avoid or reduce the potential impact damage after fatigue.

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王熙,杨洋,孙晓乐,张希妮,傅维杰.神经肌肉疲劳前后运动鞋对下肢落地冲击的生物力学影响[J].医用生物力学,2020,35(3):356-363

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  • 收稿日期:2019-03-15
  • 最后修改日期:2019-05-17
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  • 在线发布日期: 2020-06-24
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