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Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait

An FDA-approved soft wearable robot, the Myosuit, which was designed to provide hip and knee extension torque has recently been commercialized. While studies have reported reductions in metabolic costs, increased gait speeds, and improvements in clinical test scores, a comprehensive analysis of elec...

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Autores principales: Kim, Jaewook, Kim, Yekwang, Kang, Seonghyun, Kim, Seung-Jong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413953/
https://www.ncbi.nlm.nih.gov/pubmed/36015888
http://dx.doi.org/10.3390/s22166127
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author Kim, Jaewook
Kim, Yekwang
Kang, Seonghyun
Kim, Seung-Jong
author_facet Kim, Jaewook
Kim, Yekwang
Kang, Seonghyun
Kim, Seung-Jong
author_sort Kim, Jaewook
collection PubMed
description An FDA-approved soft wearable robot, the Myosuit, which was designed to provide hip and knee extension torque has recently been commercialized. While studies have reported reductions in metabolic costs, increased gait speeds, and improvements in clinical test scores, a comprehensive analysis of electromyography (EMG) signals and joint kinematics is warranted because the recruitment of appropriate muscle groups during physiological movement patterns facilitates effective motor learning. Here, we compared the lower limb joint kinematics and EMG patterns while wearing the Myosuit with that of unassisted conditions when performing level overground and incline treadmill gait. The level overground gait sessions (seven healthy subjects) were performed at self-selected speeds and the incline treadmill gait sessions (four healthy subjects) were performed at 2, 3, 4, and 5 km/h. In order to evaluate how the user is assisted, we conducted a biomechanical analysis according to the three major gait tasks: weight acceptance (WA), single-limb support, and limb advancement. The results from the gait sessions suggest that Myosuit not only well preserves the users’ natural patterns, but more importantly reduce knee extensor demand during the WA phase for both level and incline gait.
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spelling pubmed-94139532022-08-27 Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait Kim, Jaewook Kim, Yekwang Kang, Seonghyun Kim, Seung-Jong Sensors (Basel) Article An FDA-approved soft wearable robot, the Myosuit, which was designed to provide hip and knee extension torque has recently been commercialized. While studies have reported reductions in metabolic costs, increased gait speeds, and improvements in clinical test scores, a comprehensive analysis of electromyography (EMG) signals and joint kinematics is warranted because the recruitment of appropriate muscle groups during physiological movement patterns facilitates effective motor learning. Here, we compared the lower limb joint kinematics and EMG patterns while wearing the Myosuit with that of unassisted conditions when performing level overground and incline treadmill gait. The level overground gait sessions (seven healthy subjects) were performed at self-selected speeds and the incline treadmill gait sessions (four healthy subjects) were performed at 2, 3, 4, and 5 km/h. In order to evaluate how the user is assisted, we conducted a biomechanical analysis according to the three major gait tasks: weight acceptance (WA), single-limb support, and limb advancement. The results from the gait sessions suggest that Myosuit not only well preserves the users’ natural patterns, but more importantly reduce knee extensor demand during the WA phase for both level and incline gait. MDPI 2022-08-16 /pmc/articles/PMC9413953/ /pubmed/36015888 http://dx.doi.org/10.3390/s22166127 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kim, Jaewook
Kim, Yekwang
Kang, Seonghyun
Kim, Seung-Jong
Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title_full Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title_fullStr Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title_full_unstemmed Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title_short Biomechanical Analysis Suggests Myosuit Reduces Knee Extensor Demand during Level and Incline Gait
title_sort biomechanical analysis suggests myosuit reduces knee extensor demand during level and incline gait
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413953/
https://www.ncbi.nlm.nih.gov/pubmed/36015888
http://dx.doi.org/10.3390/s22166127
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