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Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries

Walking on a split-belt treadmill (each of the two belts running at a different speed) has been proposed as an experimental paradigm to investigate the flexibility of the neural control of gait and as a form of therapeutic exercise. However, the scarcity of dynamic investigations challenges the vali...

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Autores principales: Tesio, Luigi, Malloggi, Chiara, Malfitano, Calogero, Coccetta, Carlo A., Catino, Luigi, Rota, Viviana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Lippincott Williams & Wilkins 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6250259/
https://www.ncbi.nlm.nih.gov/pubmed/30303831
http://dx.doi.org/10.1097/MRR.0000000000000320
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author Tesio, Luigi
Malloggi, Chiara
Malfitano, Calogero
Coccetta, Carlo A.
Catino, Luigi
Rota, Viviana
author_facet Tesio, Luigi
Malloggi, Chiara
Malfitano, Calogero
Coccetta, Carlo A.
Catino, Luigi
Rota, Viviana
author_sort Tesio, Luigi
collection PubMed
description Walking on a split-belt treadmill (each of the two belts running at a different speed) has been proposed as an experimental paradigm to investigate the flexibility of the neural control of gait and as a form of therapeutic exercise. However, the scarcity of dynamic investigations challenges the validity of the available findings. The aim of the present study was to investigate the dynamic asymmetries of lower limbs of healthy adults during adaptation to gait on a split-belt treadmill. Ten healthy adults walked on a split-belt treadmill mounted on force sensors, with belts running either at the same speed (‘tied’ condition) or at different speeds (‘split’ condition, 0.4 vs. 0.8 or 0.8 vs. 1.2 m/s). The sagittal power and work provided by ankle, knee and hip joints, joint rotations, muscle lengthening, and surface electromyography were recorded simultaneously. Various tied/split walking sequences were requested. In the split condition a marked asymmetry between the parameters recorded from each of the two lower limbs, in particular from the ankle joint, was recorded. The work provided by the ankle (the main engine of body propulsion) was 4.8 and 2.2 times higher (in the 0.4 vs. 0.8, and 0.8 vs. 1.2 m/s conditions, respectively) compared with the slower side, and 1.2 and 1.1 times higher compared with the same speed in the tied condition. Compared with overground gait in hemiplegia, split gait entails an opposite spatial and dynamic asymmetry. The faster leg mimics the paretic limb temporally, but the unimpaired limb from the spatial and dynamic point of view. These differences challenge the proposed protocols of split gait as forms of therapeutic exercise.
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spelling pubmed-62502592018-12-10 Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries Tesio, Luigi Malloggi, Chiara Malfitano, Calogero Coccetta, Carlo A. Catino, Luigi Rota, Viviana Int J Rehabil Res Original Articles Walking on a split-belt treadmill (each of the two belts running at a different speed) has been proposed as an experimental paradigm to investigate the flexibility of the neural control of gait and as a form of therapeutic exercise. However, the scarcity of dynamic investigations challenges the validity of the available findings. The aim of the present study was to investigate the dynamic asymmetries of lower limbs of healthy adults during adaptation to gait on a split-belt treadmill. Ten healthy adults walked on a split-belt treadmill mounted on force sensors, with belts running either at the same speed (‘tied’ condition) or at different speeds (‘split’ condition, 0.4 vs. 0.8 or 0.8 vs. 1.2 m/s). The sagittal power and work provided by ankle, knee and hip joints, joint rotations, muscle lengthening, and surface electromyography were recorded simultaneously. Various tied/split walking sequences were requested. In the split condition a marked asymmetry between the parameters recorded from each of the two lower limbs, in particular from the ankle joint, was recorded. The work provided by the ankle (the main engine of body propulsion) was 4.8 and 2.2 times higher (in the 0.4 vs. 0.8, and 0.8 vs. 1.2 m/s conditions, respectively) compared with the slower side, and 1.2 and 1.1 times higher compared with the same speed in the tied condition. Compared with overground gait in hemiplegia, split gait entails an opposite spatial and dynamic asymmetry. The faster leg mimics the paretic limb temporally, but the unimpaired limb from the spatial and dynamic point of view. These differences challenge the proposed protocols of split gait as forms of therapeutic exercise. Lippincott Williams & Wilkins 2018-12 2018-10-09 /pmc/articles/PMC6250259/ /pubmed/30303831 http://dx.doi.org/10.1097/MRR.0000000000000320 Text en Copyright © 2018 The Author(s). Published by Wolters Kluwer Health, Inc. This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (http://creativecommons.org/licenses/by-nc-nd/4.0/) (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0/
spellingShingle Original Articles
Tesio, Luigi
Malloggi, Chiara
Malfitano, Calogero
Coccetta, Carlo A.
Catino, Luigi
Rota, Viviana
Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title_full Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title_fullStr Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title_full_unstemmed Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title_short Limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
title_sort limping on split-belt treadmills implies opposite kinematic and dynamic lower limb asymmetries
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6250259/
https://www.ncbi.nlm.nih.gov/pubmed/30303831
http://dx.doi.org/10.1097/MRR.0000000000000320
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