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Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet
BACKGROUND: Older adults are known to have more pronated foot posture and decreased toe flexor strength (TFS), as well as decreased mobility in daily life compared to young adults. Although foot posture is reported to be an influential factor for walking biomechanics in young adults, there is less i...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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BioMed Central
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7488436/ https://www.ncbi.nlm.nih.gov/pubmed/32912250 http://dx.doi.org/10.1186/s13047-020-00422-y |
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author | Kusagawa, Yuki Kurihara, Toshiyuki Imai, Aiko Maeo, Sumiaki Sugiyama, Takashi Kanehisa, Hiroaki Isaka, Tadao |
author_facet | Kusagawa, Yuki Kurihara, Toshiyuki Imai, Aiko Maeo, Sumiaki Sugiyama, Takashi Kanehisa, Hiroaki Isaka, Tadao |
author_sort | Kusagawa, Yuki |
collection | PubMed |
description | BACKGROUND: Older adults are known to have more pronated foot posture and decreased toe flexor strength (TFS), as well as decreased mobility in daily life compared to young adults. Although foot posture is reported to be an influential factor for walking biomechanics in young adults, there is less information on this subject in older adults. Age-related reduction in TFS is shown to be associated with impairments of functional performance, but it is poorly understood whether foot posture influences the relationships between TFS and functional performances. Therefore, the present study aimed to elucidate this concern by examining older women. METHODS: Seventy community-dwelling older women (76.8 ± 4.4 years) voluntarily participated in this study. Foot posture was evaluated by the 6-item foot posture index (FPI). Based on the FPI score, participants were allocated to pronated, neutral, or supinated group (n = 33, 26, and 11, respectively). TFS was assessed using a toe grip dynamometer in a seated position. Scores of 30-s chair stand, timed up-and-go, 5-m comfortable-speed walking, and static balance tests were determined to evaluate functional performances. Pearson’s correlation coefficients were computed to examine the relationships between TFS and functional performances in each group. RESULTS: TFS positively correlated with comfortable walking speed in the pronated (r = 0.37, p = 0.03) and supinated (r = 0.76, p < 0.001) groups, but not in the neutral group (r = 0.17, p = 0.42). For the two significant relationships, an analysis of covariance showed that there was no significant difference between the pronated and supinated groups in the slopes of the regression lines, suggesting a similar relative contribution of TFS to comfortable walking speed between the two groups. In addition, TFS tended to negatively correlate with timed up-and-go time in the pronated (r = − 0.32, p = 0.07) and supinated (r = − 0.56, p = 0.08) groups, and positively correlate with 30-s chair stand score in the pronated group (r = 0.31, p = 0.08). CONCLUSIONS: The present study indicates that TFS would be associated with mobility, walking performance in particular, in older women with pronated and supinated feet but not with neutral feet. |
format | Online Article Text |
id | pubmed-7488436 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-74884362020-09-16 Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet Kusagawa, Yuki Kurihara, Toshiyuki Imai, Aiko Maeo, Sumiaki Sugiyama, Takashi Kanehisa, Hiroaki Isaka, Tadao J Foot Ankle Res Research BACKGROUND: Older adults are known to have more pronated foot posture and decreased toe flexor strength (TFS), as well as decreased mobility in daily life compared to young adults. Although foot posture is reported to be an influential factor for walking biomechanics in young adults, there is less information on this subject in older adults. Age-related reduction in TFS is shown to be associated with impairments of functional performance, but it is poorly understood whether foot posture influences the relationships between TFS and functional performances. Therefore, the present study aimed to elucidate this concern by examining older women. METHODS: Seventy community-dwelling older women (76.8 ± 4.4 years) voluntarily participated in this study. Foot posture was evaluated by the 6-item foot posture index (FPI). Based on the FPI score, participants were allocated to pronated, neutral, or supinated group (n = 33, 26, and 11, respectively). TFS was assessed using a toe grip dynamometer in a seated position. Scores of 30-s chair stand, timed up-and-go, 5-m comfortable-speed walking, and static balance tests were determined to evaluate functional performances. Pearson’s correlation coefficients were computed to examine the relationships between TFS and functional performances in each group. RESULTS: TFS positively correlated with comfortable walking speed in the pronated (r = 0.37, p = 0.03) and supinated (r = 0.76, p < 0.001) groups, but not in the neutral group (r = 0.17, p = 0.42). For the two significant relationships, an analysis of covariance showed that there was no significant difference between the pronated and supinated groups in the slopes of the regression lines, suggesting a similar relative contribution of TFS to comfortable walking speed between the two groups. In addition, TFS tended to negatively correlate with timed up-and-go time in the pronated (r = − 0.32, p = 0.07) and supinated (r = − 0.56, p = 0.08) groups, and positively correlate with 30-s chair stand score in the pronated group (r = 0.31, p = 0.08). CONCLUSIONS: The present study indicates that TFS would be associated with mobility, walking performance in particular, in older women with pronated and supinated feet but not with neutral feet. BioMed Central 2020-09-11 /pmc/articles/PMC7488436/ /pubmed/32912250 http://dx.doi.org/10.1186/s13047-020-00422-y Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data. |
spellingShingle | Research Kusagawa, Yuki Kurihara, Toshiyuki Imai, Aiko Maeo, Sumiaki Sugiyama, Takashi Kanehisa, Hiroaki Isaka, Tadao Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title | Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title_full | Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title_fullStr | Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title_full_unstemmed | Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title_short | Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
title_sort | toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7488436/ https://www.ncbi.nlm.nih.gov/pubmed/32912250 http://dx.doi.org/10.1186/s13047-020-00422-y |
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