Cargando…

Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study

BACKGROUND: Knee ‘unloading’ footwear can reduce the external knee adduction moment in people with knee osteoarthritis, yet effects of these shoes on regional plantar forces are unknown. We evaluated the effects of unloading shoes on in-shoe regional plantar forces, and whether measures of foot post...

Descripción completa

Detalles Bibliográficos
Autores principales: van Tunen, Joyce A. C., Paterson, Kade L., Wrigley, Tim V., Metcalf, Ben R., Thorlund, Jonas B., Hinman, Rana S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019230/
https://www.ncbi.nlm.nih.gov/pubmed/29983749
http://dx.doi.org/10.1186/s13047-018-0278-x
_version_ 1783335083128651776
author van Tunen, Joyce A. C.
Paterson, Kade L.
Wrigley, Tim V.
Metcalf, Ben R.
Thorlund, Jonas B.
Hinman, Rana S.
author_facet van Tunen, Joyce A. C.
Paterson, Kade L.
Wrigley, Tim V.
Metcalf, Ben R.
Thorlund, Jonas B.
Hinman, Rana S.
author_sort van Tunen, Joyce A. C.
collection PubMed
description BACKGROUND: Knee ‘unloading’ footwear can reduce the external knee adduction moment in people with knee osteoarthritis, yet effects of these shoes on regional plantar forces are unknown. We evaluated the effects of unloading shoes on in-shoe regional plantar forces, and whether measures of foot posture and/or mobility moderate these effects in people with symptomatic knee osteoarthritis. METHODS: In this exploratory study 21 participants underwent testing while wearing knee unloading shoes (ASICS GEL-Melbourne OA) and conventional shoes in random order. Peak total forces were compared across conditions for: lateral heel, medial heel, lateral forefoot, and medial forefoot. Arch index, centre of pressure position and medial-lateral heel peak force ratio were also evaluated. Foot posture, foot mobility magnitude and navicular drop were separately added to the mixed linear model to investigate if these modified the effect of footwear on outcomes. RESULTS: Unloading shoes significantly increased lateral heel and lateral forefoot force (12.9 and 20.2% respectively, all P < 0.001), with concurrent decreases in the medial heel (8.9%, P = 0.001) and medial forefoot (9.9%, P = 0.005). Unloading shoes significantly shifted the centre of pressure anteriorly (4.7%, P < 0.001) and laterally (5.6%, P = 0.034), but did not affect the arch index (8.7%, P = 0.093). Foot posture, foot mobility magnitude and navicular drop did not moderate the effect of footwear on outcomes. CONCLUSION: Compared to conventional shoes, unloading shoes caused a lateral shift in foot pressure and force patterns. Although these effects were not moderated by foot posture, FMM or navicular drop, variability in the individual increases in lateral heel force suggests participant characteristics other than foot posture may play a role. TRIAL REGISTRATION: ACTRN12613000851763. Registered 02 August 2013.
format Online
Article
Text
id pubmed-6019230
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher BioMed Central
record_format MEDLINE/PubMed
spelling pubmed-60192302018-07-06 Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study van Tunen, Joyce A. C. Paterson, Kade L. Wrigley, Tim V. Metcalf, Ben R. Thorlund, Jonas B. Hinman, Rana S. J Foot Ankle Res Research BACKGROUND: Knee ‘unloading’ footwear can reduce the external knee adduction moment in people with knee osteoarthritis, yet effects of these shoes on regional plantar forces are unknown. We evaluated the effects of unloading shoes on in-shoe regional plantar forces, and whether measures of foot posture and/or mobility moderate these effects in people with symptomatic knee osteoarthritis. METHODS: In this exploratory study 21 participants underwent testing while wearing knee unloading shoes (ASICS GEL-Melbourne OA) and conventional shoes in random order. Peak total forces were compared across conditions for: lateral heel, medial heel, lateral forefoot, and medial forefoot. Arch index, centre of pressure position and medial-lateral heel peak force ratio were also evaluated. Foot posture, foot mobility magnitude and navicular drop were separately added to the mixed linear model to investigate if these modified the effect of footwear on outcomes. RESULTS: Unloading shoes significantly increased lateral heel and lateral forefoot force (12.9 and 20.2% respectively, all P < 0.001), with concurrent decreases in the medial heel (8.9%, P = 0.001) and medial forefoot (9.9%, P = 0.005). Unloading shoes significantly shifted the centre of pressure anteriorly (4.7%, P < 0.001) and laterally (5.6%, P = 0.034), but did not affect the arch index (8.7%, P = 0.093). Foot posture, foot mobility magnitude and navicular drop did not moderate the effect of footwear on outcomes. CONCLUSION: Compared to conventional shoes, unloading shoes caused a lateral shift in foot pressure and force patterns. Although these effects were not moderated by foot posture, FMM or navicular drop, variability in the individual increases in lateral heel force suggests participant characteristics other than foot posture may play a role. TRIAL REGISTRATION: ACTRN12613000851763. Registered 02 August 2013. BioMed Central 2018-06-26 /pmc/articles/PMC6019230/ /pubmed/29983749 http://dx.doi.org/10.1186/s13047-018-0278-x Text en © The Author(s). 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
van Tunen, Joyce A. C.
Paterson, Kade L.
Wrigley, Tim V.
Metcalf, Ben R.
Thorlund, Jonas B.
Hinman, Rana S.
Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title_full Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title_fullStr Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title_full_unstemmed Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title_short Effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
title_sort effect of knee unloading shoes on regional plantar forces in people with symptomatic knee osteoarthritis – an exploratory study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019230/
https://www.ncbi.nlm.nih.gov/pubmed/29983749
http://dx.doi.org/10.1186/s13047-018-0278-x
work_keys_str_mv AT vantunenjoyceac effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy
AT patersonkadel effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy
AT wrigleytimv effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy
AT metcalfbenr effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy
AT thorlundjonasb effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy
AT hinmanranas effectofkneeunloadingshoesonregionalplantarforcesinpeoplewithsymptomatickneeosteoarthritisanexploratorystudy