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Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults

Obesity has been related to postural instability during static standing. It remains unknown how obesity influences stability during dynamic movements like gait. The primary aim of this study was to investigate the effects of obesity on dynamic gait stability control in young adults during gait. Fort...

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Detalles Bibliográficos
Autores principales: Liu, Zhong-Qi, Yang, Feng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5235382/
https://www.ncbi.nlm.nih.gov/pubmed/28085914
http://dx.doi.org/10.1371/journal.pone.0169766
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author Liu, Zhong-Qi
Yang, Feng
author_facet Liu, Zhong-Qi
Yang, Feng
author_sort Liu, Zhong-Qi
collection PubMed
description Obesity has been related to postural instability during static standing. It remains unknown how obesity influences stability during dynamic movements like gait. The primary aim of this study was to investigate the effects of obesity on dynamic gait stability control in young adults during gait. Forty-four young adults (21 normal-weight and 23 obese) participated in this study. Participants walked five times at their self-selected gait speeds on a linear walkway. Their full-body kinematics were gathered by a motion capture system. Compared with normal-weight group, individuals with obesity walked more slowly with a shorter but wider step. People with obesity also spent an elongated double stance phase than those with normal weight. A reduced gait speed decreases the body center of mass’s velocity relative to the base of support, leading to a reduction in dynamic stability. On the other hand, a shortened step in accompanying with a less backward-leaning trunk has the potential to bring the center of mass closer to the base of support, resulting in an increase in dynamic stability. As the result of these adaptive changes to the gait pattern, dynamic gait stability among people with obesity did not significantly differ from the one among people with normal weight. Obesity seems to not be inducing dynamic stability disadvantage in young adults during level overground walking. These findings could provide insight into the mechanisms of stability control among people affected by obesity during dynamic locomotion.
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spelling pubmed-52353822017-02-06 Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults Liu, Zhong-Qi Yang, Feng PLoS One Research Article Obesity has been related to postural instability during static standing. It remains unknown how obesity influences stability during dynamic movements like gait. The primary aim of this study was to investigate the effects of obesity on dynamic gait stability control in young adults during gait. Forty-four young adults (21 normal-weight and 23 obese) participated in this study. Participants walked five times at their self-selected gait speeds on a linear walkway. Their full-body kinematics were gathered by a motion capture system. Compared with normal-weight group, individuals with obesity walked more slowly with a shorter but wider step. People with obesity also spent an elongated double stance phase than those with normal weight. A reduced gait speed decreases the body center of mass’s velocity relative to the base of support, leading to a reduction in dynamic stability. On the other hand, a shortened step in accompanying with a less backward-leaning trunk has the potential to bring the center of mass closer to the base of support, resulting in an increase in dynamic stability. As the result of these adaptive changes to the gait pattern, dynamic gait stability among people with obesity did not significantly differ from the one among people with normal weight. Obesity seems to not be inducing dynamic stability disadvantage in young adults during level overground walking. These findings could provide insight into the mechanisms of stability control among people affected by obesity during dynamic locomotion. Public Library of Science 2017-01-13 /pmc/articles/PMC5235382/ /pubmed/28085914 http://dx.doi.org/10.1371/journal.pone.0169766 Text en © 2017 Liu, Yang http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://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
Liu, Zhong-Qi
Yang, Feng
Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title_full Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title_fullStr Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title_full_unstemmed Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title_short Obesity May Not Induce Dynamic Stability Disadvantage during Overground Walking among Young Adults
title_sort obesity may not induce dynamic stability disadvantage during overground walking among young adults
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5235382/
https://www.ncbi.nlm.nih.gov/pubmed/28085914
http://dx.doi.org/10.1371/journal.pone.0169766
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