The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective

Abstract This study aims to improve our understanding of gait initiation mechanisms and the lower-limb joint mechanical energy contributions. Healthy subjects were instructed to initiate gait on an instrumented track to reach three self-selected target velocities: slow, normal and fast. Lower-limb j...

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Autores principales:	Guoping Zhao, Martin Grimmer, Andre Seyfarth
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/93d04272afb3420da8b32d521d832591
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spelling	oai:doaj.org-article:93d04272afb3420da8b32d521d8325912021-11-21T12:24:32ZThe mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective10.1038/s41598-021-01694-52045-2322https://doaj.org/article/93d04272afb3420da8b32d521d8325912021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01694-5https://doaj.org/toc/2045-2322Abstract This study aims to improve our understanding of gait initiation mechanisms and the lower-limb joint mechanical energy contributions. Healthy subjects were instructed to initiate gait on an instrumented track to reach three self-selected target velocities: slow, normal and fast. Lower-limb joint kinematics and kinetics of the first five strides were analyzed. The results show that the initial lateral weight shift is achieved by hip abduction torque on the lifting leg (leading limb). Before the take-off of the leading limb, the forward body movement is initiated by decreasing ankle plantarflexion torque, which results in an inverted pendulum-like passive forward fall. The hip flexion/extension joint has the greatest positive mechanical energy output in the first stride of the leading limb, while the ankle joint contributes the most positive mechanical energy in the first stride of the trailing limb (stance leg). Our results indicate a strong correlation between control of the frontal plane and the sagittal plane joints during gait initiation. The identified mechanisms and the related data can be used as a guideline for improving gait initiation with wearable robots such as exoskeletons and prostheses.Guoping ZhaoMartin GrimmerAndre SeyfarthNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guoping Zhao Martin Grimmer Andre Seyfarth The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
description	Abstract This study aims to improve our understanding of gait initiation mechanisms and the lower-limb joint mechanical energy contributions. Healthy subjects were instructed to initiate gait on an instrumented track to reach three self-selected target velocities: slow, normal and fast. Lower-limb joint kinematics and kinetics of the first five strides were analyzed. The results show that the initial lateral weight shift is achieved by hip abduction torque on the lifting leg (leading limb). Before the take-off of the leading limb, the forward body movement is initiated by decreasing ankle plantarflexion torque, which results in an inverted pendulum-like passive forward fall. The hip flexion/extension joint has the greatest positive mechanical energy output in the first stride of the leading limb, while the ankle joint contributes the most positive mechanical energy in the first stride of the trailing limb (stance leg). Our results indicate a strong correlation between control of the frontal plane and the sagittal plane joints during gait initiation. The identified mechanisms and the related data can be used as a guideline for improving gait initiation with wearable robots such as exoskeletons and prostheses.
format	article
author	Guoping Zhao Martin Grimmer Andre Seyfarth
author_facet	Guoping Zhao Martin Grimmer Andre Seyfarth
author_sort	Guoping Zhao
title	The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
title_short	The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
title_full	The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
title_fullStr	The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
title_full_unstemmed	The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
title_sort	mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/93d04272afb3420da8b32d521d832591
work_keys_str_mv	AT guopingzhao themechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective AT martingrimmer themechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective AT andreseyfarth themechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective AT guopingzhao mechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective AT martingrimmer mechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective AT andreseyfarth mechanismsandmechanicalenergyofhumangaitinitiationfromthelowerlimbjointlevelperspective
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The mechanisms and mechanical energy of human gait initiation from the lower-limb joint level perspective

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