Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet
Abstract 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 i...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2020-09-01
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| Series: | Journal of Foot and Ankle Research |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13047-020-00422-y |
| _version_ | 1797334888066580480 |
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| author | Yuki Kusagawa Toshiyuki Kurihara Aiko Imai Sumiaki Maeo Takashi Sugiyama Hiroaki Kanehisa Tadao Isaka |
| author_facet | Yuki Kusagawa Toshiyuki Kurihara Aiko Imai Sumiaki Maeo Takashi Sugiyama Hiroaki Kanehisa Tadao Isaka |
| author_sort | Yuki Kusagawa |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-03-08T08:28:47Z |
| format | Article |
| id | doaj.art-c39d226bda1942569f935c5d6b033333 |
| institution | Directory Open Access Journal |
| issn | 1757-1146 |
| language | English |
| last_indexed | 2024-03-08T08:28:47Z |
| publishDate | 2020-09-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Foot and Ankle Research |
| spelling | doaj.art-c39d226bda1942569f935c5d6b0333332024-02-02T04:10:56ZengBMCJournal of Foot and Ankle Research1757-11462020-09-011311810.1186/s13047-020-00422-yToe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feetYuki Kusagawa0Toshiyuki Kurihara1Aiko Imai2Sumiaki Maeo3Takashi Sugiyama4Hiroaki Kanehisa5Tadao Isaka6Graduate School of Sport and Health Science, Ritsumeikan UniversityResearch Organization of Science and Technology, Ritsumeikan UniversityGraduate School of Sport and Health Science, Ritsumeikan UniversityResearch Organization of Science and Technology, Ritsumeikan UniversityRitsumeikan Global Innovation Research Organization, Ritsumeikan UniversityFaculty of Sport and Health Science, Ritsumeikan UniversityFaculty of Sport and Health Science, Ritsumeikan UniversityAbstract 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.http://link.springer.com/article/10.1186/s13047-020-00422-yFoot alignmentFoot posture indexToe grip strengthFunctional performanceComfortable walking speedAgeing |
| spellingShingle | Yuki Kusagawa Toshiyuki Kurihara Aiko Imai Sumiaki Maeo Takashi Sugiyama Hiroaki Kanehisa Tadao Isaka Toe flexor strength is associated with mobility in older adults with pronated and supinated feet but not with neutral feet Journal of Foot and Ankle Research Foot alignment Foot posture index Toe grip strength Functional performance Comfortable walking speed Ageing |
| 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 | Foot alignment Foot posture index Toe grip strength Functional performance Comfortable walking speed Ageing |
| url | http://link.springer.com/article/10.1186/s13047-020-00422-y |
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