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Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior
The purpose of this study was to investigate the effects of different vertical positions of an asymmetrical load on the anticipatory postural adjustments phase of gait initiation. Sixty-eight college students (32 males, 36 females; age: 23.65 ± 3.21 years old; weight: 69.98 ± 8.15 kg; height: 1.74 ±...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8195414/ https://www.ncbi.nlm.nih.gov/pubmed/34115751 http://dx.doi.org/10.1371/journal.pone.0242892 |
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author | Vieira, Marcus Fraga Rodrigues, Fábio Barbosa de Oliveira Assis, Alfredo de Mendonça Mesquita, Eduardo Lemes, Thiago Santana De Villa, Guilherme Augusto Gomes Baptista, Rafael Reimann de Oliveira Andrade, Adriano Lobo da Costa, Paula Hentschel |
author_facet | Vieira, Marcus Fraga Rodrigues, Fábio Barbosa de Oliveira Assis, Alfredo de Mendonça Mesquita, Eduardo Lemes, Thiago Santana De Villa, Guilherme Augusto Gomes Baptista, Rafael Reimann de Oliveira Andrade, Adriano Lobo da Costa, Paula Hentschel |
author_sort | Vieira, Marcus Fraga |
collection | PubMed |
description | The purpose of this study was to investigate the effects of different vertical positions of an asymmetrical load on the anticipatory postural adjustments phase of gait initiation. Sixty-eight college students (32 males, 36 females; age: 23.65 ± 3.21 years old; weight: 69.98 ± 8.15 kg; height: 1.74 ± 0.08 m) were enrolled in the study. Ground reaction forces and moments were collected using two force platforms. The participants completed three trials under each of the following random conditions: no-load (NL), waist uniformly distributed load (WUD), shoulder uniformly distributed load (SUD), waist stance foot load (WST), shoulder stance foot load (SST), waist swing foot load (WSW), and shoulder swing foot load (SSW). The paired Hotelling’s T-square test was used to compare the experimental conditions. The center of pressure (COP) time series were significantly different for the SUD vs. NL, SST vs. NL, WST vs. NL, and WSW vs. NL comparisons. Significant differences in COP time series were observed for all comparisons between waist vs. shoulder conditions. Overall, these differences were greater when the load was positioned at the shoulders. For the center of mass (COM) time series, significant differences were found for the WUD vs. NL and WSW vs. NL conditions. However, no differences were observed with the load positioned at the shoulders. In conclusion, only asymmetrical loading at the waist produced significant differences, and the higher the extra load, the greater the effects on COP behavior. By contrast, only minor changes were observed in COM behavior, suggesting that the changes in COP (the controller) behavior are adjustments to maintain the COM (controlled object) unaltered. |
format | Online Article Text |
id | pubmed-8195414 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-81954142021-06-21 Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior Vieira, Marcus Fraga Rodrigues, Fábio Barbosa de Oliveira Assis, Alfredo de Mendonça Mesquita, Eduardo Lemes, Thiago Santana De Villa, Guilherme Augusto Gomes Baptista, Rafael Reimann de Oliveira Andrade, Adriano Lobo da Costa, Paula Hentschel PLoS One Research Article The purpose of this study was to investigate the effects of different vertical positions of an asymmetrical load on the anticipatory postural adjustments phase of gait initiation. Sixty-eight college students (32 males, 36 females; age: 23.65 ± 3.21 years old; weight: 69.98 ± 8.15 kg; height: 1.74 ± 0.08 m) were enrolled in the study. Ground reaction forces and moments were collected using two force platforms. The participants completed three trials under each of the following random conditions: no-load (NL), waist uniformly distributed load (WUD), shoulder uniformly distributed load (SUD), waist stance foot load (WST), shoulder stance foot load (SST), waist swing foot load (WSW), and shoulder swing foot load (SSW). The paired Hotelling’s T-square test was used to compare the experimental conditions. The center of pressure (COP) time series were significantly different for the SUD vs. NL, SST vs. NL, WST vs. NL, and WSW vs. NL comparisons. Significant differences in COP time series were observed for all comparisons between waist vs. shoulder conditions. Overall, these differences were greater when the load was positioned at the shoulders. For the center of mass (COM) time series, significant differences were found for the WUD vs. NL and WSW vs. NL conditions. However, no differences were observed with the load positioned at the shoulders. In conclusion, only asymmetrical loading at the waist produced significant differences, and the higher the extra load, the greater the effects on COP behavior. By contrast, only minor changes were observed in COM behavior, suggesting that the changes in COP (the controller) behavior are adjustments to maintain the COM (controlled object) unaltered. Public Library of Science 2021-06-11 /pmc/articles/PMC8195414/ /pubmed/34115751 http://dx.doi.org/10.1371/journal.pone.0242892 Text en © 2021 Vieira 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 Vieira, Marcus Fraga Rodrigues, Fábio Barbosa de Oliveira Assis, Alfredo de Mendonça Mesquita, Eduardo Lemes, Thiago Santana De Villa, Guilherme Augusto Gomes Baptista, Rafael Reimann de Oliveira Andrade, Adriano Lobo da Costa, Paula Hentschel Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title | Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title_full | Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title_fullStr | Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title_full_unstemmed | Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title_short | Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior |
title_sort | effects of additional load at different heights on gait initiation: a statistical parametric mapping of center of pressure and center of mass behavior |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8195414/ https://www.ncbi.nlm.nih.gov/pubmed/34115751 http://dx.doi.org/10.1371/journal.pone.0242892 |
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