Cargando…
Estimated lower speed boundary at which the walk ratio constancy is broken in healthy adults
[Purpose] The ratio of step length to cadence (walk ratio) is invariant over a wide range of speeds. However, no studies have investigated details of the change in the walk ratio at slow speeds. It is necessary to explore how walking behavior changes at a low speed to understand the slow walking obs...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Society of Physical Therapy Science
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5430280/ https://www.ncbi.nlm.nih.gov/pubmed/28533617 http://dx.doi.org/10.1589/jpts.29.722 |
_version_ | 1783236184329158656 |
---|---|
author | Murakami, Rumi Otaka, Yohei |
author_facet | Murakami, Rumi Otaka, Yohei |
author_sort | Murakami, Rumi |
collection | PubMed |
description | [Purpose] The ratio of step length to cadence (walk ratio) is invariant over a wide range of speeds. However, no studies have investigated details of the change in the walk ratio at slow speeds. It is necessary to explore how walking behavior changes at a low speed to understand the slow walking observed in various conditions such as aging and pathological conditions. In this study, changes in the walk ratio at slow speeds were investigated, and a lower boundary was estimated at which the walk ratio constancy is broken. [Subjects and Methods] Twenty-one healthy adults were instructed to walk along a flat, straight walkway at five different speeds (fast, preferred, slightly slow, slow, and very slow). The walk ratio was calculated from the step length and cadence. [Results] As the walking speed decreased, the walk ratio and variance began to increase abruptly. The initial break in the walk ratio constancy was at approximately 62 m/min. In addition, the boundary of cadence was approximately 98 m/steps/min. [Conclusions] The study successfully determined a lower boundary at which the walk ratio constancy was broken, suggesting that different control strategies are used when walking at less than the gait speed at which constancy is broken in healthy adults. The finding provides valuable information for understanding slow walking observed in individuals with various pathological conditions. |
format | Online Article Text |
id | pubmed-5430280 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | The Society of Physical Therapy Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-54302802017-05-22 Estimated lower speed boundary at which the walk ratio constancy is broken in healthy adults Murakami, Rumi Otaka, Yohei J Phys Ther Sci Original Article [Purpose] The ratio of step length to cadence (walk ratio) is invariant over a wide range of speeds. However, no studies have investigated details of the change in the walk ratio at slow speeds. It is necessary to explore how walking behavior changes at a low speed to understand the slow walking observed in various conditions such as aging and pathological conditions. In this study, changes in the walk ratio at slow speeds were investigated, and a lower boundary was estimated at which the walk ratio constancy is broken. [Subjects and Methods] Twenty-one healthy adults were instructed to walk along a flat, straight walkway at five different speeds (fast, preferred, slightly slow, slow, and very slow). The walk ratio was calculated from the step length and cadence. [Results] As the walking speed decreased, the walk ratio and variance began to increase abruptly. The initial break in the walk ratio constancy was at approximately 62 m/min. In addition, the boundary of cadence was approximately 98 m/steps/min. [Conclusions] The study successfully determined a lower boundary at which the walk ratio constancy was broken, suggesting that different control strategies are used when walking at less than the gait speed at which constancy is broken in healthy adults. The finding provides valuable information for understanding slow walking observed in individuals with various pathological conditions. The Society of Physical Therapy Science 2017-04-20 2017-04 /pmc/articles/PMC5430280/ /pubmed/28533617 http://dx.doi.org/10.1589/jpts.29.722 Text en 2017©by the Society of Physical Therapy Science. Published by IPEC Inc. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Original Article Murakami, Rumi Otaka, Yohei Estimated lower speed boundary at which the walk ratio constancy is broken in healthy adults |
title | Estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
title_full | Estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
title_fullStr | Estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
title_full_unstemmed | Estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
title_short | Estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
title_sort | estimated lower speed boundary at which the walk ratio constancy is broken in
healthy adults |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5430280/ https://www.ncbi.nlm.nih.gov/pubmed/28533617 http://dx.doi.org/10.1589/jpts.29.722 |
work_keys_str_mv | AT murakamirumi estimatedlowerspeedboundaryatwhichthewalkratioconstancyisbrokeninhealthyadults AT otakayohei estimatedlowerspeedboundaryatwhichthewalkratioconstancyisbrokeninhealthyadults |