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Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study

BACKGROUND: The risk factors for the development of plantar fasciitis (PF) have been associated with the medial longitudinal arch (MLA), rearfoot alignment and calcaneal overload. However, the relationships between the biomechanical variables have yet to be determined. OBJECTIVE: The goal of this st...

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Autores principales: Ribeiro, Ana P., Sacco, Isabel C. N., Dinato, Roberto C., João, Silvia M. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4835169/
https://www.ncbi.nlm.nih.gov/pubmed/26786073
http://dx.doi.org/10.1590/bjpt-rbf.2014.0136
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author Ribeiro, Ana P.
Sacco, Isabel C. N.
Dinato, Roberto C.
João, Silvia M. A.
author_facet Ribeiro, Ana P.
Sacco, Isabel C. N.
Dinato, Roberto C.
João, Silvia M. A.
author_sort Ribeiro, Ana P.
collection PubMed
description BACKGROUND: The risk factors for the development of plantar fasciitis (PF) have been associated with the medial longitudinal arch (MLA), rearfoot alignment and calcaneal overload. However, the relationships between the biomechanical variables have yet to be determined. OBJECTIVE: The goal of this study was to investigate the relationships between the MLA, rearfoot alignment, and dynamic plantar loads in runners with unilateral PF in acute and chronic phases. METHOD: Cross-sectional study which thirty-five runners with unilateral PF were evaluated: 20 in the acute phase (with pain) and 15 with previous chronic PF (without pain). The MLA index and rearfoot alignment were calculated using digital images. The contact area, maximum force, peak pressure, and force-time integral over three plantar areas were acquired with Pedar X insoles while running at 12 km/h, and the loading rates were calculated from the vertical forces. RESULTS: The multiple regression analyses indicated that both the force-time integral (R (2)=0.15 for acute phase PF; R (2)=0.17 for chronic PF) and maximum force (R (2)=0.35 for chronic PF) over the forefoot were predicted by an elevated MLA index. The rearfoot valgus alignment predicted the maximum force over the rearfoot in both PF groups: acute (R (2)=0.18) and chronic (R (2)=0.45). The rearfoot valgus alignment also predicted higher loading rates in the PF groups: acute (R (2)=0.19) and chronic (R (2)=0.40). CONCLUSION: The MLA index and the rearfoot alignment were good predictors of plantar loads over the forefoot and rearfoot areas in runners with PF. However, rearfoot valgus was demonstrated to be an important clinical measure, since it was able to predict the maximum force and both loading rates over the rearfoot.
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spelling pubmed-48351692016-04-27 Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study Ribeiro, Ana P. Sacco, Isabel C. N. Dinato, Roberto C. João, Silvia M. A. Braz J Phys Ther Original Articles BACKGROUND: The risk factors for the development of plantar fasciitis (PF) have been associated with the medial longitudinal arch (MLA), rearfoot alignment and calcaneal overload. However, the relationships between the biomechanical variables have yet to be determined. OBJECTIVE: The goal of this study was to investigate the relationships between the MLA, rearfoot alignment, and dynamic plantar loads in runners with unilateral PF in acute and chronic phases. METHOD: Cross-sectional study which thirty-five runners with unilateral PF were evaluated: 20 in the acute phase (with pain) and 15 with previous chronic PF (without pain). The MLA index and rearfoot alignment were calculated using digital images. The contact area, maximum force, peak pressure, and force-time integral over three plantar areas were acquired with Pedar X insoles while running at 12 km/h, and the loading rates were calculated from the vertical forces. RESULTS: The multiple regression analyses indicated that both the force-time integral (R (2)=0.15 for acute phase PF; R (2)=0.17 for chronic PF) and maximum force (R (2)=0.35 for chronic PF) over the forefoot were predicted by an elevated MLA index. The rearfoot valgus alignment predicted the maximum force over the rearfoot in both PF groups: acute (R (2)=0.18) and chronic (R (2)=0.45). The rearfoot valgus alignment also predicted higher loading rates in the PF groups: acute (R (2)=0.19) and chronic (R (2)=0.40). CONCLUSION: The MLA index and the rearfoot alignment were good predictors of plantar loads over the forefoot and rearfoot areas in runners with PF. However, rearfoot valgus was demonstrated to be an important clinical measure, since it was able to predict the maximum force and both loading rates over the rearfoot. Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia 2016-01-19 2016 /pmc/articles/PMC4835169/ /pubmed/26786073 http://dx.doi.org/10.1590/bjpt-rbf.2014.0136 Text en http://creativecommons.org/licenses/by/4.0 This is an open-access article distributed under the terms of the Creative Commons Attribution License
spellingShingle Original Articles
Ribeiro, Ana P.
Sacco, Isabel C. N.
Dinato, Roberto C.
João, Silvia M. A.
Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title_full Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title_fullStr Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title_full_unstemmed Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title_short Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
title_sort relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4835169/
https://www.ncbi.nlm.nih.gov/pubmed/26786073
http://dx.doi.org/10.1590/bjpt-rbf.2014.0136
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