Cargando…

Local Dynamic Stability Associated with Load Carrying

OBJECTIVES: Load carrying tasks are recognized as one of the primary occupational factors leading to slip and fall injuries. Nevertheless, the mechanisms associated with load carrying and walking stability remain illusive. The objective of the current study was to apply local dynamic stability measu...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Jian, Lockhart, Thurmon E
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Occupational Safety and Health Research Institute 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3601296/
https://www.ncbi.nlm.nih.gov/pubmed/23515183
http://dx.doi.org/10.5491/SHAW.2013.4.1.46
_version_ 1782475750084968448
author Liu, Jian
Lockhart, Thurmon E
author_facet Liu, Jian
Lockhart, Thurmon E
author_sort Liu, Jian
collection PubMed
description OBJECTIVES: Load carrying tasks are recognized as one of the primary occupational factors leading to slip and fall injuries. Nevertheless, the mechanisms associated with load carrying and walking stability remain illusive. The objective of the current study was to apply local dynamic stability measure in walking while carrying a load, and to investigate the possible adaptive gait stability changes. METHODS: Current study involved 25 young adults in a biomechanics research laboratory. One tri-axial accelerometer was used to measure three-dimensional low back acceleration during continuous treadmill walking. Local dynamic stability was quantified by the maximum Lyapunov exponent (maxLE) from a nonlinear dynamics approach. RESULTS: Long term maxLE was found to be significant higher under load condition than no-load condition in all three reference axes, indicating the declined local dynamic stability associated with load carrying. CONCLUSION: Current study confirmed the sensitivity of local dynamic stability measure in load carrying situation. It was concluded that load carrying tasks were associated with declined local dynamic stability, which may result in increased risk of fall accident. This finding has implications in preventing fall accidents associated with occupational load carrying.
format Online
Article
Text
id pubmed-3601296
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Occupational Safety and Health Research Institute
record_format MEDLINE/PubMed
spelling pubmed-36012962013-03-20 Local Dynamic Stability Associated with Load Carrying Liu, Jian Lockhart, Thurmon E Saf Health Work Original Article OBJECTIVES: Load carrying tasks are recognized as one of the primary occupational factors leading to slip and fall injuries. Nevertheless, the mechanisms associated with load carrying and walking stability remain illusive. The objective of the current study was to apply local dynamic stability measure in walking while carrying a load, and to investigate the possible adaptive gait stability changes. METHODS: Current study involved 25 young adults in a biomechanics research laboratory. One tri-axial accelerometer was used to measure three-dimensional low back acceleration during continuous treadmill walking. Local dynamic stability was quantified by the maximum Lyapunov exponent (maxLE) from a nonlinear dynamics approach. RESULTS: Long term maxLE was found to be significant higher under load condition than no-load condition in all three reference axes, indicating the declined local dynamic stability associated with load carrying. CONCLUSION: Current study confirmed the sensitivity of local dynamic stability measure in load carrying situation. It was concluded that load carrying tasks were associated with declined local dynamic stability, which may result in increased risk of fall accident. This finding has implications in preventing fall accidents associated with occupational load carrying. Occupational Safety and Health Research Institute 2013-03 2013-03-11 /pmc/articles/PMC3601296/ /pubmed/23515183 http://dx.doi.org/10.5491/SHAW.2013.4.1.46 Text en Copyright © 2013 by Safety and Health at Work (SH@W) http://creativecommons.org/licenses/by-nc/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Liu, Jian
Lockhart, Thurmon E
Local Dynamic Stability Associated with Load Carrying
title Local Dynamic Stability Associated with Load Carrying
title_full Local Dynamic Stability Associated with Load Carrying
title_fullStr Local Dynamic Stability Associated with Load Carrying
title_full_unstemmed Local Dynamic Stability Associated with Load Carrying
title_short Local Dynamic Stability Associated with Load Carrying
title_sort local dynamic stability associated with load carrying
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3601296/
https://www.ncbi.nlm.nih.gov/pubmed/23515183
http://dx.doi.org/10.5491/SHAW.2013.4.1.46
work_keys_str_mv AT liujian localdynamicstabilityassociatedwithloadcarrying
AT lockhartthurmone localdynamicstabilityassociatedwithloadcarrying