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Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry

Millions of people walk with asymmetric gait patterns, highlighting a need for customizable rehabilitation approaches that can flexibly target different aspects of gait asymmetry. Here, we studied how simple within-stride changes in treadmill speed could drive selective changes in gait symmetry. In...

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Autores principales: Browne, Michael G., Stenum, Jan, Padmanabhan, Purnima, Roemmich, Ryan T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10602355/
https://www.ncbi.nlm.nih.gov/pubmed/37883477
http://dx.doi.org/10.1371/journal.pone.0287568
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author Browne, Michael G.
Stenum, Jan
Padmanabhan, Purnima
Roemmich, Ryan T.
author_facet Browne, Michael G.
Stenum, Jan
Padmanabhan, Purnima
Roemmich, Ryan T.
author_sort Browne, Michael G.
collection PubMed
description Millions of people walk with asymmetric gait patterns, highlighting a need for customizable rehabilitation approaches that can flexibly target different aspects of gait asymmetry. Here, we studied how simple within-stride changes in treadmill speed could drive selective changes in gait symmetry. In Experiment 1, healthy adults (n = 10) walked on an instrumented treadmill with and without a closed-loop controller engaged. This controller changed the treadmill speed to 1.50 or 0.75 m/s depending on whether the right or left leg generated propulsive ground reaction forces, respectively. Participants walked asymmetrically when the controller was engaged: the leg that accelerated during propulsion (right) showed smaller leading limb angles, larger trailing limb angles, and smaller propulsive forces than the leg that decelerated (left). In Experiment 2, healthy adults (n = 10) walked on the treadmill with and without an open-loop controller engaged. This controller changed the treadmill speed to 1.50 or 0.75 m/s at a prescribed time interval while a metronome guided participants to step at different time points relative to the speed change. Different patterns of gait asymmetry emerged depending on the timing of the speed change: step times, leading limb angles, and peak propulsion were asymmetric when the speed changed early in stance while step lengths, step times, and propulsion impulses were asymmetric when the speed changed later in stance. In sum, we show that simple manipulations of treadmill speed can drive selective changes in gait symmetry. Future work will explore the potential for this technique to restore gait symmetry in clinical populations.
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spelling pubmed-106023552023-10-27 Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry Browne, Michael G. Stenum, Jan Padmanabhan, Purnima Roemmich, Ryan T. PLoS One Research Article Millions of people walk with asymmetric gait patterns, highlighting a need for customizable rehabilitation approaches that can flexibly target different aspects of gait asymmetry. Here, we studied how simple within-stride changes in treadmill speed could drive selective changes in gait symmetry. In Experiment 1, healthy adults (n = 10) walked on an instrumented treadmill with and without a closed-loop controller engaged. This controller changed the treadmill speed to 1.50 or 0.75 m/s depending on whether the right or left leg generated propulsive ground reaction forces, respectively. Participants walked asymmetrically when the controller was engaged: the leg that accelerated during propulsion (right) showed smaller leading limb angles, larger trailing limb angles, and smaller propulsive forces than the leg that decelerated (left). In Experiment 2, healthy adults (n = 10) walked on the treadmill with and without an open-loop controller engaged. This controller changed the treadmill speed to 1.50 or 0.75 m/s at a prescribed time interval while a metronome guided participants to step at different time points relative to the speed change. Different patterns of gait asymmetry emerged depending on the timing of the speed change: step times, leading limb angles, and peak propulsion were asymmetric when the speed changed early in stance while step lengths, step times, and propulsion impulses were asymmetric when the speed changed later in stance. In sum, we show that simple manipulations of treadmill speed can drive selective changes in gait symmetry. Future work will explore the potential for this technique to restore gait symmetry in clinical populations. Public Library of Science 2023-10-26 /pmc/articles/PMC10602355/ /pubmed/37883477 http://dx.doi.org/10.1371/journal.pone.0287568 Text en © 2023 Browne et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Browne, Michael G.
Stenum, Jan
Padmanabhan, Purnima
Roemmich, Ryan T.
Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title_full Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title_fullStr Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title_full_unstemmed Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title_short Simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
title_sort simple within-stride changes in treadmill speed can drive selective changes in human gait symmetry
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10602355/
https://www.ncbi.nlm.nih.gov/pubmed/37883477
http://dx.doi.org/10.1371/journal.pone.0287568
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