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A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait

BACKGROUND: Excessive range of adductory free moment of the ground reaction force may potentially increase the risk of lower extremity injuries by applying a higher torsional load transmitted to the proximal parts. OBJECTIVE: It was hypothesized that the free moment pattern might be different betwee...

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Autores principales: F., Yazdani, M., Razeghi, S., Ebrahimi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Shiraz University of Medical Sciences 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7036418/
https://www.ncbi.nlm.nih.gov/pubmed/32158716
http://dx.doi.org/10.31661/jbpe.v0i0.639
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author F., Yazdani
M., Razeghi
S., Ebrahimi
author_facet F., Yazdani
M., Razeghi
S., Ebrahimi
author_sort F., Yazdani
collection PubMed
description BACKGROUND: Excessive range of adductory free moment of the ground reaction force may potentially increase the risk of lower extremity injuries by applying a higher torsional load transmitted to the proximal parts. OBJECTIVE: It was hypothesized that the free moment pattern might be different between hyper-pronated and normal feet subjects. Moreover, a correlation would exist between peak adduction free moment and peak ankle-foot complex abduction at the stance phase of walking. MATERIAL AND METHODS: In this cross sectional study, thirty female participants were divided into two groups of asymptomatic hyper-pronated and normal feet. Kinetic and kinematic data were collected using a single force plate and a six-camera motion analysis system during three successful free speed walking trials. Ensemble average curves were extracted from the time normalized individual trials of the stance phase for both free moment and peak ankle-foot complex abduction parameters. RESULTS: Significant differences in peak adductory free moment, peak ankle-foot complex eversion and peak ankle-foot complex abduction were found between normal and hyper-pronated groups (4.90±0.97 Vs. 5.94±0.88, P < 0.01), (3.30±0.95 Vs. 6.28±1.47, P < 0.01) and (4.52±1.16 Vs. 8.23±2.52, P < 0.01) respectively. A significant positive correlation was found between the peak adduction free moment and peak ankle-foot complex abduction in both groups, which was more strongly positive in hyper-pronated group (r = 0.745, p < 0.01 for normal group and r = 0.900, p < 0.01 for hyper-pronated group). CONCLUSION: As a good measure of torque which is transmitted to the lower extremity, may free moment be a useful biomechanical indicator for both clinical and research purposes.
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spelling pubmed-70364182020-03-10 A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait F., Yazdani M., Razeghi S., Ebrahimi J Biomed Phys Eng Original Article BACKGROUND: Excessive range of adductory free moment of the ground reaction force may potentially increase the risk of lower extremity injuries by applying a higher torsional load transmitted to the proximal parts. OBJECTIVE: It was hypothesized that the free moment pattern might be different between hyper-pronated and normal feet subjects. Moreover, a correlation would exist between peak adduction free moment and peak ankle-foot complex abduction at the stance phase of walking. MATERIAL AND METHODS: In this cross sectional study, thirty female participants were divided into two groups of asymptomatic hyper-pronated and normal feet. Kinetic and kinematic data were collected using a single force plate and a six-camera motion analysis system during three successful free speed walking trials. Ensemble average curves were extracted from the time normalized individual trials of the stance phase for both free moment and peak ankle-foot complex abduction parameters. RESULTS: Significant differences in peak adductory free moment, peak ankle-foot complex eversion and peak ankle-foot complex abduction were found between normal and hyper-pronated groups (4.90±0.97 Vs. 5.94±0.88, P < 0.01), (3.30±0.95 Vs. 6.28±1.47, P < 0.01) and (4.52±1.16 Vs. 8.23±2.52, P < 0.01) respectively. A significant positive correlation was found between the peak adduction free moment and peak ankle-foot complex abduction in both groups, which was more strongly positive in hyper-pronated group (r = 0.745, p < 0.01 for normal group and r = 0.900, p < 0.01 for hyper-pronated group). CONCLUSION: As a good measure of torque which is transmitted to the lower extremity, may free moment be a useful biomechanical indicator for both clinical and research purposes. Shiraz University of Medical Sciences 2020-02-01 /pmc/articles/PMC7036418/ /pubmed/32158716 http://dx.doi.org/10.31661/jbpe.v0i0.639 Text en Copyright: © 2020: Journal of Biomedical Physics and Engineering https://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 Unported License (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
F., Yazdani
M., Razeghi
S., Ebrahimi
A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title_full A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title_fullStr A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title_full_unstemmed A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title_short A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
title_sort comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7036418/
https://www.ncbi.nlm.nih.gov/pubmed/32158716
http://dx.doi.org/10.31661/jbpe.v0i0.639
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