Background

Although the effects of medial wedge insoles on lower limb biomechanics have been investigated, information about the effects of different magnitudes of medial posting is still lacking.

Research question

What are the dose-response effects of medial wedge insoles with postings varying between 0 °, 3 °, 6 °, and 9 ° of inclination on the lower limb biomechanics during walking and running in individuals with pronated feet?

Methods

Sixteen participants with an FPI ≥ 6 were recruited. Four arch-supported insole conditions with varying degrees of medial heel wedge were tested (0°, 3°, 6°, and 9°). A 3D motion analysis system with force plates was used to obtain the kinetics and kinematics of walking and running at self-selected speeds. To compare the ankle, knee, and hip angles and moments among conditions, a time series analysis was performed using Statistical Parametric Mapping (SPM).

Results

A reduction in ankle eversion angle was observed during walking for all insoles. For running, the 6° and 9° insoles decreased the ankle eversion angle during early stance and increased this angle during the propulsive phase. A decrease in ankle eversion moment was observed in walking and running for 6° and 9° insoles. An increase in knee adduction moment occurred in walking and running for all insoles. For hip, the 6° and 9° insoles showed, during walking, a decrease in hip adduction angle and an increase in hip adduction and external rotation moments. For most variables, statistical differences were found for a greater period across the stance phase as the medial wedge increased, except for ankle eversion moment and hip external rotation moment during walking.

Significance

The biomechanical effects over the time series for many of the parameters increased with the addition of insole inclination, showing a dose-response effect of medial wedge insoles on the lower limb biomechanics during walking and running in adults with excessive foot pronation.

中文翻译：

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内侧楔形鞋垫对步行和跑步时足内翻的人的下肢生物力学是否存在剂量反应？

背景

尽管已经研究了内侧楔形鞋垫对下肢生物力学的影响，但仍然缺乏有关不同程度的内侧张贴影响的信息。

研究问题

在足内旋的个体中，在步行和跑步过程中，内侧楔形鞋垫在 0°、3°、6° 和 9° 倾斜度之间变化对下肢生物力学的剂量反应影响是什么？

方法

招募了 16 名 FPI ≥ 6 的参与者。测试了具有不同程度的内侧足跟楔形的四种足弓支撑的鞋垫条件（0°、3°、6° 和 9°）。带有测力板的 3D 运动分析系统用于获得以自选速度行走和跑步的动力学和运动学。为了比较不同条件下的脚踝、膝盖和臀部的角度和力矩，使用统计参数映射 (SPM) 进行了时间序列分析。

结果

在步行期间观察到所有鞋垫的脚踝外翻角减小。对于跑步，6° 和 9° 鞋垫在早期站立期间减小了脚踝外翻角度，并在推进阶段增加了这个角度。6°和9°鞋垫在步行和跑步时观察到脚踝外翻力矩减少。所有鞋垫在步行和跑步时膝关节内收力矩增加。对于臀部，6°和9°鞋垫在行走过程中表现出髋内收角度减小，髋内收和外旋力矩增加。对于大多数变量，随着内侧楔形的增加，整个站立阶段的统计差异在更长的时间内被发现，除了步行过程中的踝关节外翻力矩和髋关节外旋力矩。

意义

随着鞋垫倾斜度的增加，许多参数在时间序列上的生物力学效应增加，表明内侧楔形鞋垫对足内旋过度的成人在步行和跑步过程中对下肢生物力学的剂量反应效应。