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

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Title:	Effects of prefabricated arch-support insole hardness on foot pressure and muscle activity in mountaineer porters during load-bearing tasks in mountainous terrain
Authors:	戴偉勳 Tai, Wei-Hsun
Contributors:	體育學系運動教練碩博士班 Graduate Institute of Sport Coaching Science
Keywords:	Arch support Loading-cariage Plantar pressure Porter
Date:	2024-09
Issue Date:	2024-09-23 11:54:58 (UTC+8)
Publisher:	Elsevier B.V.
Abstract:	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.
Relation:	International Journal of Industrial Ergonomics,103
Appears in Collections:	[Graduate Institute of Sport Coaching Science ] journal articles

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