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How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?

Lower-limb exoskeletons, regardless of their control strategies, have been shown to alter a user’s gait just by the exoskeleton’s own mass and inertia. The characterization of these differences in joint kinematics and kinetics under exoskeleton-like added mass is important for the design of such dev...

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Autores principales: Fang, Shanpu, Vijayan, Vinayak, Reissman, Megan E., Kinney, Allison L., Reissman, Timothy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738556/
https://www.ncbi.nlm.nih.gov/pubmed/36501878
http://dx.doi.org/10.3390/s22239177
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author Fang, Shanpu
Vijayan, Vinayak
Reissman, Megan E.
Kinney, Allison L.
Reissman, Timothy
author_facet Fang, Shanpu
Vijayan, Vinayak
Reissman, Megan E.
Kinney, Allison L.
Reissman, Timothy
author_sort Fang, Shanpu
collection PubMed
description Lower-limb exoskeletons, regardless of their control strategies, have been shown to alter a user’s gait just by the exoskeleton’s own mass and inertia. The characterization of these differences in joint kinematics and kinetics under exoskeleton-like added mass is important for the design of such devices and their control strategies. In this study, 19 young, healthy participants walked overground at self-selected speeds with six added mass conditions and one zero-added-mass condition. The added mass conditions included +2/+4 lb on each shank or thigh or +8/+16 lb on the pelvis. OpenSim-derived lower-limb sagittal-plane kinematics and kinetics were evaluated statistically with both peak analysis and statistical parametric mapping (SPM). The results showed that adding smaller masses (+2/+8 lb) altered some kinematic and kinetic peaks but did not result in many changes across the regions of the gait cycle identified by SPM. In contrast, adding larger masses (+4/+16 lb) showed significant changes within both the peak and SPM analyses. In general, adding larger masses led to kinematic differences at the ankle and knee during early swing, and at the hip throughout the gait cycle, as well as kinetic differences at the ankle during stance. Future exoskeleton designs may implement these characterizations to inform exoskeleton hardware structure and cooperative control strategies.
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spelling pubmed-97385562022-12-11 How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body? Fang, Shanpu Vijayan, Vinayak Reissman, Megan E. Kinney, Allison L. Reissman, Timothy Sensors (Basel) Article Lower-limb exoskeletons, regardless of their control strategies, have been shown to alter a user’s gait just by the exoskeleton’s own mass and inertia. The characterization of these differences in joint kinematics and kinetics under exoskeleton-like added mass is important for the design of such devices and their control strategies. In this study, 19 young, healthy participants walked overground at self-selected speeds with six added mass conditions and one zero-added-mass condition. The added mass conditions included +2/+4 lb on each shank or thigh or +8/+16 lb on the pelvis. OpenSim-derived lower-limb sagittal-plane kinematics and kinetics were evaluated statistically with both peak analysis and statistical parametric mapping (SPM). The results showed that adding smaller masses (+2/+8 lb) altered some kinematic and kinetic peaks but did not result in many changes across the regions of the gait cycle identified by SPM. In contrast, adding larger masses (+4/+16 lb) showed significant changes within both the peak and SPM analyses. In general, adding larger masses led to kinematic differences at the ankle and knee during early swing, and at the hip throughout the gait cycle, as well as kinetic differences at the ankle during stance. Future exoskeleton designs may implement these characterizations to inform exoskeleton hardware structure and cooperative control strategies. MDPI 2022-11-25 /pmc/articles/PMC9738556/ /pubmed/36501878 http://dx.doi.org/10.3390/s22239177 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
Fang, Shanpu
Vijayan, Vinayak
Reissman, Megan E.
Kinney, Allison L.
Reissman, Timothy
How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title_full How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title_fullStr How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title_full_unstemmed How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title_short How Do Joint Kinematics and Kinetics Change When Walking Overground with Added Mass on the Lower Body?
title_sort how do joint kinematics and kinetics change when walking overground with added mass on the lower body?
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738556/
https://www.ncbi.nlm.nih.gov/pubmed/36501878
http://dx.doi.org/10.3390/s22239177
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