Effects of corrective insole on leg muscle activation and lower extremity alignment in rice farmers with pronated foot: a preliminary report

Kristanto, Agung (2021) Effects of corrective insole on leg muscle activation and lower extremity alignment in rice farmers with pronated foot: a preliminary report. [Artikel Dosen]

Text 1-s2.0-S0958259220301097-main.pdf Download (3MB)

Abstract

Background: Execution of strenuous activities in conjunction with slippery and viscous muddy working terrain in
rice cultivation leads to a high prevalence of farmer musculoskeletal disorders and malalignments. Recommended
intervention strategies originally designed for congenitally disabled individuals may also be applicable
to farmers, including simple corrective wedges to reduce foot eversion. The objective of the present study was to
conduct a preliminary investigation of the effects of corrective wedges on lower extremity muscle activity and
alignment when subjects stood on flat rigid ground or muddy terrain, simulating typical work conditions
encountered by the unique but populous Thai rice farming workforce.
Methods: Nine healthy farmers with pronated feet were recruited to participate and wedges were custom
fabricated for each farmer based on physical therapy assessment and use of rapid prototyping techniques. Participants
were asked to stand barefoot or with wedges on the two surface types.
Results: Results revealed foot pronation and knee valgus to improve (ranging, on average between 5.5 and 16.1
degrees) when participants were equipped with corrective wedges. The muscle activity of the peroneus longus
and the tibialis anterior increased for muddy terrain, as compared with the rigid surface. In general, the wedges
induced less tibialis anterior activity and greater peroneus longus activity, compared to when participants were
standing barefoot. An elevation in evertor muscle activity may reflect stretching of the shortened muscle as a
result of the reduced degree of foot pronation.
Conclusions: Findings demonstrate potential benefits of corrective insole usage for farmers with pronated feet,
including improved lower extremity alignment and invertor muscle activity reduction for both rigid and muddy
terrains.

Item Type:	Artikel Dosen
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisi / Prodi:	Faculty of Industrial Technology (Fakultas Teknologi Industri) > S1-Industrial Engineering (S1-Teknik Industri)
Depositing User:	Dr. Agung Kristanto
Date Deposited:	02 Jun 2021 01:48
Last Modified:	02 Jun 2021 01:48
URI:	http://eprints.uad.ac.id/id/eprint/24620

Actions (login required)

View Item