Background

Increased foot pronation during walking has been associated with low back pain. This association may be due to the impact of increased pronation on pelvic motion.

Objective

To investigate the effects of increased bilateral foot pronation on pelvic kinematic in frontal and transverse planes during the loading response phase of gait.

Methods

Pelvic, hip, and foot angular positions of 20 participants were collected while they walked at fast speed wearing flat and medially inclined insoles inserted in the shoes. Pelvic motion in frontal and transverse planes was analyzed during the loading response phase. Foot eversion-inversion was analyzed during the complete stance phase to verify the insoles effectiveness in inducing increased pronation and to exclude excessive pronators.

Results

Inclined insoles were effective in inducing increased foot pronation. Pelvic and hip motion were altered in the increased pronation condition compared to the control condition. In the frontal plane, mean pelvic position was more inclined to the contralateral side (mean difference [MD]: 0.54°; 95%CI: 0.23, 0.86) and its range of motion (ROM) was reduced (MD: 0.50°; 95%CI: 0.20, 0.79). In the transverse plane, mean pelvic position was less rotated toward the contralateral leg (MD: 1.03°; 95%CI: 0.65, 1.60) without changes in ROM (MD: 0.04°; 95%CI: -0.17, 0.25). The hip was more internally rotated (MD: 1.37°; 95%CI: 0.76, 1.98) without changes in ROM (MD: 0.10°; 95%CI: -1.02, 1.23).

Conclusion

Increased bilateral foot pronation changes pelvic motion during walking and should be assessed, as a contributing factor to possible pelvic and lower back disorders.

中文翻译：

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足旋前影响步态负荷反应阶段的骨盆运动

背景

走路时足部内旋增加与腰痛有关。这种关联可能是由于增加旋前对骨盆运动的影响。

客观的

研究在步态负荷反应阶段增加双侧足旋前对骨盆正面和横向平面运动学的影响。

方法

收集了 20 名参与者的骨盆、臀部和足部角度位置，同时他们穿着插入鞋内的平坦且向内倾斜的鞋垫快速行走。在加载响应阶段分析了正面和横向平面的骨盆运动。在整个站立阶段分析足部外翻内翻，以验证鞋垫在诱导旋前增加和排除过度旋前方面的有效性。

结果

倾斜的鞋垫可有效诱导足部内旋增加。与控制条件相比，增加旋前条件下的骨盆和髋关节运动发生了改变。在额面上，平均骨盆位置更倾向于对侧（平均差 [MD]：0.54°；95%CI：0.23，0.86），其活动范围（ROM）减少（MD：0.50°；95 %CI：0.20, 0.79)。在横向平面上，平均骨盆位置向对侧腿旋转较少（MD：1.03°；95%CI：0.65，1.60），而 ROM 没有变化（MD：0.04°；95%CI：-0.17，0.25）。髋关节更内旋（MD：1.37°；95%CI：0.76，1.98），而 ROM 没有变化（MD：0.10°；95%CI：-1.02，1.23）。

结论

双侧足部旋前增加会改变行走过程中的骨盆运动，应进行评估，作为可能的骨盆和下背部疾病的一个促成因素。