Department of Orthopaedic Surgery, Faculty of Medicine, the University of Tokyo, Tokyo, Japan; Department of Orthopaedic Surgery, Teikyo University Mizonokuchi Hospital, Kanagawa, Japan.
Lifestyle Support Department, Global Innovation Business Unit, NEC Corporation, Tokyo, Japan.
Gait Posture. 2024 Oct;114:42-47. doi: 10.1016/j.gaitpost.2024.08.074. Epub 2024 Aug 27.
Assessing the effect of insoles on gait biomechanics and foot comfort remains challenging. Our novel in-insole-type wearable sensor device (smart insole) enables accurate quantitative evaluation of gait parameters without affecting the subject's foot comfort.
What are the effects of insoles on gait biomechanics and foot comfort in patients with flatfoot, as evaluated using a novel smart insole?
Thirty-three subjects with 61 flatfeet were recruited. Three different types of prefabricated insoles were tested: a control insole as an experimental control, a flat insole with only cushion pads for the shock absorbing function, and an arch support insole with both cushioning pads and arch support functions. Gait parameters and visual analog scale (VAS) scores for foot comfort were measured during 30 m of straight walking with each insole incorporating the wearable sensor device. The differences in gait parameters and foot comfort between the flat and arch support insoles relative to the control insole were analyzed. Additionally, the correlations between gait parameters and foot comfort were evaluated.
Maximum plantarflexion angle significantly decreased (p = 0.03) and the toe-out angle significantly increased (p < 0.01) with arch support insoles compared to flat insoles. Significantly better foot comfort was demonstrated when walking with arch support insoles than with flat insoles (p < 0.01). The only gait parameter correlated with foot comfort was foot lift height while walking with an arch support insole (r = -0.45, p < 0.01).
A novel smart insole revealed that foot lift height was a key gait parameter for determining foot comfort while walking with an arch support insole. Our findings provide important evidence for selecting a comfortable flatfoot insole based on gait data measured using a smart insole.
评估鞋垫对步态生物力学和足部舒适度的影响仍然具有挑战性。我们新开发的嵌入式鞋垫式可穿戴传感器设备（智能鞋垫）能够在不影响受试者足部舒适度的情况下，对步态参数进行准确的定量评估。
使用新型智能鞋垫评估鞋垫对扁平足患者步态生物力学和足部舒适度的影响。
共招募 33 名 61 足扁平足患者。测试了三种不同类型的预制鞋垫：作为实验对照的普通鞋垫、仅具有减震功能的平底鞋垫和具有减震垫和足弓支撑功能的足弓支撑鞋垫。在使用可穿戴传感器设备的情况下，每位受试者在 30 米直线行走中分别使用这三种鞋垫，测量步态参数和足部舒适度的视觉模拟评分（VAS）。分析了与普通鞋垫相比，平底和足弓支撑鞋垫对步态参数和足部舒适度的差异。此外，还评估了步态参数与足部舒适度之间的相关性。
与平底鞋垫相比，足弓支撑鞋垫可显著减小最大跖屈角度（p = 0.03）和增加外展角度（p < 0.01）。与平底鞋垫相比，使用足弓支撑鞋垫时足部舒适度明显更好（p < 0.01）。在使用足弓支撑鞋垫行走时，唯一与足部舒适度相关的步态参数是足部提升高度（r = -0.45，p < 0.01）。
新型智能鞋垫揭示了足部提升高度是使用足弓支撑鞋垫行走时决定足部舒适度的关键步态参数。我们的研究结果为根据智能鞋垫测量的步态数据选择舒适的扁平足鞋垫提供了重要依据。
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