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Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics

BACKGROUND: A specific walking speed minimizing the U-shaped relationship between energy cost of transport per unit distance (CoT) and speed is called economical speed (ES). To investigate the effects of reduced body weight on the ES, we installed a body weight support (BWS) apparatus with a spring-...

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Autores principales: Abe, Daijiro, Sakata, Shunsuke, Motoyama, Kiyotaka, Toyota, Naoki, Nishizono, Hidetsugu, Horiuchi, Masahiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8422757/
https://www.ncbi.nlm.nih.gov/pubmed/34488873
http://dx.doi.org/10.1186/s13102-021-00336-7
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author Abe, Daijiro
Sakata, Shunsuke
Motoyama, Kiyotaka
Toyota, Naoki
Nishizono, Hidetsugu
Horiuchi, Masahiro
author_facet Abe, Daijiro
Sakata, Shunsuke
Motoyama, Kiyotaka
Toyota, Naoki
Nishizono, Hidetsugu
Horiuchi, Masahiro
author_sort Abe, Daijiro
collection PubMed
description BACKGROUND: A specific walking speed minimizing the U-shaped relationship between energy cost of transport per unit distance (CoT) and speed is called economical speed (ES). To investigate the effects of reduced body weight on the ES, we installed a body weight support (BWS) apparatus with a spring-like characteristics. We also examined whether the 'calculated' ES was equivalent to the 'preferred' walking speed (PWS) with 30% BWS. METHODS: We measured oxygen uptake and carbon dioxide output to calculate CoT values at seven treadmill walking speeds (0.67–2.00 m s(− 1)) in 40 healthy young males under normal walking (NW) and BWS. The PWS was determined under both conditions on a different day. RESULTS: A spring-like behavior of our BWS apparatus reduced the CoT values at 1.56, 1.78, and 2.00 m s(− 1). The ES with BWS (1.61 ± 0.11 m s(− 1)) was faster than NW condition (1.39 ± 0.06 m s(− 1)). A Bland-Altman analysis indicated that there were no systematic biases between ES and PWS in both conditions. CONCLUSIONS: The use of BWS apparatus with a spring-like behavior reduced the CoT values at faster walking speeds, resulting in the faster ES with 30% BWS compared to NW. Since the ES was equivalent to the PWS in both conditions, the PWS could be mainly determined by the metabolic minimization in healthy young males. This result also derives that the PWS can be a substitutable index of the individual ES in these populations.
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spelling pubmed-84227572021-09-09 Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics Abe, Daijiro Sakata, Shunsuke Motoyama, Kiyotaka Toyota, Naoki Nishizono, Hidetsugu Horiuchi, Masahiro BMC Sports Sci Med Rehabil Research BACKGROUND: A specific walking speed minimizing the U-shaped relationship between energy cost of transport per unit distance (CoT) and speed is called economical speed (ES). To investigate the effects of reduced body weight on the ES, we installed a body weight support (BWS) apparatus with a spring-like characteristics. We also examined whether the 'calculated' ES was equivalent to the 'preferred' walking speed (PWS) with 30% BWS. METHODS: We measured oxygen uptake and carbon dioxide output to calculate CoT values at seven treadmill walking speeds (0.67–2.00 m s(− 1)) in 40 healthy young males under normal walking (NW) and BWS. The PWS was determined under both conditions on a different day. RESULTS: A spring-like behavior of our BWS apparatus reduced the CoT values at 1.56, 1.78, and 2.00 m s(− 1). The ES with BWS (1.61 ± 0.11 m s(− 1)) was faster than NW condition (1.39 ± 0.06 m s(− 1)). A Bland-Altman analysis indicated that there were no systematic biases between ES and PWS in both conditions. CONCLUSIONS: The use of BWS apparatus with a spring-like behavior reduced the CoT values at faster walking speeds, resulting in the faster ES with 30% BWS compared to NW. Since the ES was equivalent to the PWS in both conditions, the PWS could be mainly determined by the metabolic minimization in healthy young males. This result also derives that the PWS can be a substitutable index of the individual ES in these populations. BioMed Central 2021-09-06 /pmc/articles/PMC8422757/ /pubmed/34488873 http://dx.doi.org/10.1186/s13102-021-00336-7 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Abe, Daijiro
Sakata, Shunsuke
Motoyama, Kiyotaka
Toyota, Naoki
Nishizono, Hidetsugu
Horiuchi, Masahiro
Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title_full Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title_fullStr Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title_full_unstemmed Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title_short Economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
title_sort economical and preferred walking speed using body weight support apparatus with a spring-like characteristics
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8422757/
https://www.ncbi.nlm.nih.gov/pubmed/34488873
http://dx.doi.org/10.1186/s13102-021-00336-7
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