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. <br />Objective: It was hypothesized that the free moment pattern might be diff...
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doaj-d401aadc98714849991ed6a5072787082020-11-25T02:12:09ZengShiraz University of Medical SciencesJournal of Biomedical Physics and Engineering2251-72002251-72002020-02-011019310210.31661/jbpe.v0i0.63944625A comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gaitF Yazdani0M Razeghi1S Ebrahimi2PhD, Rehabilitation Sciences Research Centre, Department of Physical Therapy, School of Rehabilitation Sc ences, Shiraz University of Medical Sciences, Shiraz, IranPhD, Rehabilitation Sciences Research Centre, Department of Physical Therapy, School of Rehabilitation Sc ences, Shiraz University of Medical Sciences, Shiraz, IranPhD, Rehabilitation Sciences Research Centre, Department of Physical Therapy, School of Rehabilitation Sc ences, Shiraz University of Medical Sciences, Shiraz, IranBackground: 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. <br />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. <br />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. <br />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). <br />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.http://jbpe.sums.ac.ir/article_44625_28ac4b3abf70e9de69153e6f23cd37eb.pdfgait analysisflatfootkinematicskinetics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
F Yazdani M Razeghi S Ebrahimi |
spellingShingle |
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 Journal of Biomedical Physics and Engineering gait analysis flatfoot kinematics kinetics |
author_facet |
F Yazdani M Razeghi S Ebrahimi |
author_sort |
F Yazdani |
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_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_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_sort |
comparison of the free moment pattern between normal and hyper-pronated aligned feet in female subjects during the stance phase of gait |
publisher |
Shiraz University of Medical Sciences |
series |
Journal of Biomedical Physics and Engineering |
issn |
2251-7200 2251-7200 |
publishDate |
2020-02-01 |
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. <br />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. <br />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. <br />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). <br />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. |
topic |
gait analysis flatfoot kinematics kinetics |
url |
http://jbpe.sums.ac.ir/article_44625_28ac4b3abf70e9de69153e6f23cd37eb.pdf |
work_keys_str_mv |
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