Influence of a novel elastic foot orthosis in foot motion during locomotion in adults with mild flatfoot
Influence of a novel elastic foot orthosis in foot motion during locomotion in adults with mild flatfoot
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DOI：
10.1016/j.gaitpost.2022.01.016
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发表时间：
2022-01-25
期刊：
影响因子：
2.4
通讯作者：
Sakamoto, Kodai
中科院分区：
文献类型：
--
作者：
Kudo, Shintarou;Sakamoto, Kodai
背景：足弓塌陷是胫骨内侧应激综合征的危险因素之一。定制的足部矫形器用于减少足弓塌陷，但矫形器是为特定鞋设计的，不能用于其他鞋。我们开发了一种弹性足部矫形器，它使用薄膜高度贴合足部，重量轻，可以搭配任何鞋或不穿鞋使用。本研究的目的是研究我们的弹性足矫形器在步行和跑步时的足部运动学。方法：我们招募了30名无症状扁平足患者。记录跑步机行走、跑步机跑步和地上行走的足部运动学数据。记录赤脚（BF）、弹性足矫形器（EFO）和假足矫形器（SFO）三种情况下的足部运动学，并使用拉伸应变传感器测量足部应变。步态中足部从初始接触到最大应变的差值计算为负荷弓应变，反映为前足外翻偏移。采用Bonferroni检验进行单向方差分析，比较三种情况下的加载弓应变。结果：在所有任务中，EFO加载弓应变显著小于BF和SFO加载弓应变。在跑步机步态条件下，SFO负荷弓应变显著大于BF负荷弓应变。结论：我们的研究结果表明，与没有EFO相比，EFO在运动过程中减少了足部疲劳，并且能够在运动过程中支撑足弓。
Background: Collapse of the foot arch is a one of the risk factors in medial tibial stress syndrome. Custom-made foot orthoses are used to reduce the collapse of foot arch, but the orthoses are designed for a specific shoe and cannot be used in other shoes. We developed an elastic foot orthosis that is highly fitted on the foot using thin films, is lightweight, and can be used with any shoe or without shoes. The purpose of this study was to investigate foot kinematics with our elastic foot orthosis during walking and running. Methods: We recruited 30 participants with asymptomatic flatfoot for this study. Foot kinematic data were recorded for treadmill walking, treadmill running, and over-ground walking. Foot kinematics were recorded in three conditions, barefoot (BF), with the elastic foot orthosis (EFO), and with sham foot orthosis (SFO), and foot strain was measured using a stretch strain sensor. The difference in foot strain from initial contact to maximum strain during gait was calculated as loading arch strain, which was reflected as forefoot eversion excursion. A one-way analysis of variance with Bonferroni test was performed to compare the loading arch strain among the three conditions. Results: In all tasks, loading arch strain with the EFO was significantly less than that in the BF and SFO conditions. Loading arch strain with the SFO was significantly more than that of BF in the treadmill gait condition. Conclusion: Our results indicate that the EFO decreased foot strain during locomotion compared to without the EFO and is capable of supporting the foot arch during locomotion.