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Energy absorption at lower limb joints in different foot contact strategies while descending stairs

BACKGROUND: Joint loads in different walking strategies during stair descent have been investigated in terms of the joint moment in association with the risk of osteoarthritis. However, the absorption mechanisms of the potential energy loss are not known. OBJECTIVE: This study aims to compare the me...

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Autores principales: Jeon, Hyeong-Min, Lee, Ki-Kwang, Lee, Jun-Young, Shin, Ju-Hwan, Eom, Gwang-Moon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: IOS Press 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8150500/
https://www.ncbi.nlm.nih.gov/pubmed/33682780
http://dx.doi.org/10.3233/THC-218041
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author Jeon, Hyeong-Min
Lee, Ki-Kwang
Lee, Jun-Young
Shin, Ju-Hwan
Eom, Gwang-Moon
author_facet Jeon, Hyeong-Min
Lee, Ki-Kwang
Lee, Jun-Young
Shin, Ju-Hwan
Eom, Gwang-Moon
author_sort Jeon, Hyeong-Min
collection PubMed
description BACKGROUND: Joint loads in different walking strategies during stair descent have been investigated in terms of the joint moment in association with the risk of osteoarthritis. However, the absorption mechanisms of the potential energy loss are not known. OBJECTIVE: This study aims to compare the mechanical energy absorptions in lower limb joints in different initial foot contact strategies. METHODS: Nineteen young subjects walked down on instrumented stairs with two different strategies, i.e., forefoot and rearfoot strike. Power and energy at lower limb joints during stance phase were compared between strategies. RESULTS: Lower limb joints absorbed 73 [Formula: see text] 11% of the potential energy released by descending stairs and there was no difference between strategies. Rearfoot strategy absorbed less energy than forefoot strategy at the ankle joint in the 1st phase, which was compensated mainly by more energy absorption at the knee in the 2nd phase and less energy generation at the hip joints in the 3rd phase. CONCLUSION: The results suggest that a leg absorbs most of the potential energy while descending stairs irrespective of the walking strategies and that any reduction of energy absorption at one joint is compensated by other joints. Greater energy absorption at the knee joint compared to the other joints suggests high burden of knee joint muscles and connective tissues during stair-descent, which is even more significant for the rearfoot strike strategy.
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spelling pubmed-81505002021-06-09 Energy absorption at lower limb joints in different foot contact strategies while descending stairs Jeon, Hyeong-Min Lee, Ki-Kwang Lee, Jun-Young Shin, Ju-Hwan Eom, Gwang-Moon Technol Health Care Research Article BACKGROUND: Joint loads in different walking strategies during stair descent have been investigated in terms of the joint moment in association with the risk of osteoarthritis. However, the absorption mechanisms of the potential energy loss are not known. OBJECTIVE: This study aims to compare the mechanical energy absorptions in lower limb joints in different initial foot contact strategies. METHODS: Nineteen young subjects walked down on instrumented stairs with two different strategies, i.e., forefoot and rearfoot strike. Power and energy at lower limb joints during stance phase were compared between strategies. RESULTS: Lower limb joints absorbed 73 [Formula: see text] 11% of the potential energy released by descending stairs and there was no difference between strategies. Rearfoot strategy absorbed less energy than forefoot strategy at the ankle joint in the 1st phase, which was compensated mainly by more energy absorption at the knee in the 2nd phase and less energy generation at the hip joints in the 3rd phase. CONCLUSION: The results suggest that a leg absorbs most of the potential energy while descending stairs irrespective of the walking strategies and that any reduction of energy absorption at one joint is compensated by other joints. Greater energy absorption at the knee joint compared to the other joints suggests high burden of knee joint muscles and connective tissues during stair-descent, which is even more significant for the rearfoot strike strategy. IOS Press 2021-03-25 /pmc/articles/PMC8150500/ /pubmed/33682780 http://dx.doi.org/10.3233/THC-218041 Text en © 2021 – The authors. Published by IOS Press. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial (CC BY-NC 4.0) License (https://creativecommons.org/licenses/by-nc/4.0/) , which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Jeon, Hyeong-Min
Lee, Ki-Kwang
Lee, Jun-Young
Shin, Ju-Hwan
Eom, Gwang-Moon
Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title_full Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title_fullStr Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title_full_unstemmed Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title_short Energy absorption at lower limb joints in different foot contact strategies while descending stairs
title_sort energy absorption at lower limb joints in different foot contact strategies while descending stairs
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8150500/
https://www.ncbi.nlm.nih.gov/pubmed/33682780
http://dx.doi.org/10.3233/THC-218041
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