Effects of prefabricated arch-support insole hardness on foot pressure and muscle activity in mountaineer porters during load-bearing tasks in mountainous terrain

IF 2.5 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

International Journal of Industrial Ergonomics Pub Date : 2024-08-26 DOI:10.1016/j.ergon.2024.103635

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引用次数: 0

Abstract

Background

The study aimed to compare the effects of medium hardness and high hardness arch-support insoles, with the latter modified by a soft forefoot pad, on foot pressure distribution and muscle activation during high-load carrying tasks in authentic mountainous trail environments.

Methods

Sixteen male mountaineer porters with experience in high-load carrying tasks participated in the experiments. They wore commercially available prefabricated arch-support insoles, specifically referred to as medium hardness arch-support material (MH) and high hardness arch-support material attached a 1-mm soft sponge pad to the forefoot area (HHSF) during uphill and downhill walking tasks with a 25-kg load. Foot pressure and muscle activation were measured using wireless pressure distribution insoles and a wireless surface electromyography system, respectively.

Results

The HHSF showed significantly higher perceived comfort scores and reduced foot pressure in specific regions during downhill walking (p < 0.05). It exhibited increased peak foot pressure in the forefoot during uphill walking (p < 0.05). The MH showed greater foot pressure in the second metatarsal during downhill walking and a larger contact area in the midfoot during uphill walking (p < 0.05). Muscle activation did not differ significantly between the two insoles (p > 0.05).

Conclusion

The study indicates that combining a high hardness arch-support insole with a soft forefoot pad may enhance comfort and potentially reduce foot injury risks, and improves foot propulsion and pressure distribution.

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预制足弓支撑鞋垫硬度对登山搬运工在山地负重时足部压力和肌肉活动的影响

背景该研究旨在比较中等硬度和高硬度足弓支撑鞋垫（后者通过前脚掌软垫进行了改良）在真实山路环境中执行高负荷搬运任务时对脚压分布和肌肉激活的影响。方法16名具有高负荷搬运经验的男性登山搬运工参加了实验。他们穿着市售预制足弓支撑鞋垫（具体称为中等硬度足弓支撑材料（MH）和高硬度足弓支撑材料（HHSF）），在负重 25 公斤的情况下进行上坡和下坡行走。结果在下坡行走过程中，HHSF 的舒适感得分明显更高，特定区域的足底压力也有所降低（p <0.05）。在上坡行走时，HHSF 显示前脚掌的峰值足压增加（p < 0.05）。在下坡行走时，MH 在第二跖骨处表现出更大的足压，在上坡行走时，中足的接触面积更大（p <0.05）。结论该研究表明，将高硬度足弓支撑鞋垫与柔软的前脚掌垫结合使用，可提高舒适度，降低足部受伤风险，并改善足部推进力和压力分布。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Industrial Ergonomics 工程技术-工程：工业

CiteScore

6.40

自引率

12.90%

发文量

110

审稿时长

56 days

期刊介绍： The journal publishes original contributions that add to our understanding of the role of humans in today systems and the interactions thereof with various system components. The journal typically covers the following areas: industrial and occupational ergonomics, design of systems, tools and equipment, human performance measurement and modeling, human productivity, humans in technologically complex systems, and safety. The focus of the articles includes basic theoretical advances, applications, case studies, new methodologies and procedures; and empirical studies.

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