Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles

Abstract Forty-seven percent of falling accidents in older adults are caused by tripping over obstacles. Understanding what strategies are involved in obstacle negotiation in older adults could reduce fall risks. There is a paucity of research investigating how healthy adults negotiate multiple obst...

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Autores principales:	Jung Hung Chien, Jerod Post, Ka-Chun Siu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/88f89f9f777c46bcb220b570b6d84cad
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spelling	oai:doaj.org-article:88f89f9f777c46bcb220b570b6d84cad2021-12-02T15:08:29ZEffects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles10.1038/s41598-018-26807-52045-2322https://doaj.org/article/88f89f9f777c46bcb220b570b6d84cad2018-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-26807-5https://doaj.org/toc/2045-2322Abstract Forty-seven percent of falling accidents in older adults are caused by tripping over obstacles. Understanding what strategies are involved in obstacle negotiation in older adults could reduce fall risks. There is a paucity of research investigating how healthy adults negotiate multiple obstacles, which may better reflect the complexity of the real environment. The presence of a second obstacle has induced mixed results in the obstacle negotiation of healthy older adults with the interval between obstacles two steps apart. This study extended the knowledge to understand what strategies healthy younger and older adults used to step over two obstacles placed at three-step-length apart. Twenty healthy subjects performed 2 tasks: level ground walking and stepping over two obstacles. The height of each obstacle was set at 10% of subjects’ leg height. We found that aging significantly increased the toe clearance in leading and trailing legs when stepping over the obstacles at a three-step-length interval. Toe clearance was higher while stepping over the second obstacle than the first one in older adults. These results had two-fold meanings: the three-step-length interval was long enough to trigger the adjustment of the obstacle negotiation strategy, and aging led older adults to use conservative negotiation strategies.Jung Hung ChienJerod PostKa-Chun SiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jung Hung Chien Jerod Post Ka-Chun Siu Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
description	Abstract Forty-seven percent of falling accidents in older adults are caused by tripping over obstacles. Understanding what strategies are involved in obstacle negotiation in older adults could reduce fall risks. There is a paucity of research investigating how healthy adults negotiate multiple obstacles, which may better reflect the complexity of the real environment. The presence of a second obstacle has induced mixed results in the obstacle negotiation of healthy older adults with the interval between obstacles two steps apart. This study extended the knowledge to understand what strategies healthy younger and older adults used to step over two obstacles placed at three-step-length apart. Twenty healthy subjects performed 2 tasks: level ground walking and stepping over two obstacles. The height of each obstacle was set at 10% of subjects’ leg height. We found that aging significantly increased the toe clearance in leading and trailing legs when stepping over the obstacles at a three-step-length interval. Toe clearance was higher while stepping over the second obstacle than the first one in older adults. These results had two-fold meanings: the three-step-length interval was long enough to trigger the adjustment of the obstacle negotiation strategy, and aging led older adults to use conservative negotiation strategies.
format	article
author	Jung Hung Chien Jerod Post Ka-Chun Siu
author_facet	Jung Hung Chien Jerod Post Ka-Chun Siu
author_sort	Jung Hung Chien
title	Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
title_short	Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
title_full	Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
title_fullStr	Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
title_full_unstemmed	Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles
title_sort	effects of aging on the obstacle negotiation strategy while stepping over multiple obstacles
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/88f89f9f777c46bcb220b570b6d84cad
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Effects of Aging on the Obstacle Negotiation Strategy while Stepping over Multiple Obstacles

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