两种习惯性着地方式对跑步支撑期下肢动力学特征的影响
Effects of two habitual landing modes on the dynamic characteristics of lower limbs during the running supporting period
投稿时间:2018-03-31  
DOI:
中文关键词:着地方式  跑步  动力学特征  损伤
英文关键词:landing mode  running  dynamic characteristics  damages
基金项目:江苏省研究生科研创新计划(KYCX17_1963)
作者单位E-mail
马渊源 苏州大学 18734892029@163.com 
雷园园 苏州大学 leiyuanyuan_2017@163.com 
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中文摘要:
      目的:探究习惯后足着地者和习惯前足着地者在跑步支撑期下肢动力学的不同。方法:采用 Kistler三维测力台(采集力学指标,1 000 Hz)采集受试者跑步支撑期(测试足从足着地到足离地)的动力学数据。结果:习惯后足着地组(RFS)在支撑时间上比习惯前足着地组(FFS)的时间微长,但二者不具有显著差异(P>0.05);RFS组在支撑期内外方向的最小值和最大值均小于FFS组,且呈显著差异(P<0.05);RFS组在支撑期前后方向的最小值(即制动力峰值)和最大值(即加速力峰值)均要高于FFS组,且呈显著差异(P<0.05);FFS组在支撑期垂直方向的最大峰值力和第一载荷率均高于RFS组,但不具有显著差异,且出现峰值时间无显著差异(P>0.05)。结论:跑步时不同的着地方式影响了下肢的生物力学特征,习惯后足着地者跑步支撑期下肢动力学特征与习惯前足着地者主要在内外方向和前后方向上具有一定的差异。
英文摘要:
      Objective: To study the differences between RFS group and FFS group in lower limbs dynamics during the running supporting period. Method: Collecting subject's kinetic data during running supporting period (testing feet's process from landing the ground to leaving the ground) using a Kistler three-dimensional force table (mechanical index, 1 000 Hz). Result: RFS group's supporting time was slightly longer than that of FFS group, but there was no significant difference (P>0.05). The minimum and maximum values in terms of internal and external directions of RFS group during the supporting period were both lower than those of FFS group, and there was a significant difference (P<0.05); the minimum (i.e., the peak value of the braking force) and maximum (i.e., the peak value of the acceleration force) value in terms of forward and backwards directions of RFS group were both higher than those of FFS group, and there was a significant difference (P<0.05); the maximum peak force and the first loading rate in vertical direction of FFS group were both higher than those of RFS group, but there was no significant difference, and there was also no significant difference in terms of peak time (P>0.05). Conclusion: Different landing modes affect the biomechanical characteristics of the lower limbs during running. The dynamic characteristics of the lower limbs in the running supporting period of RFS group and FFS group are mainly different in internal and external directions as well as forward and backward directions.
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