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Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task

This study aimed to evaluate motor unit recruitment during submaximal voluntary ramp contraction in the medial head of the gastrocnemius muscle (MG) by high-density spatial electromyography (SEMG) before and after static stretching (SS) in healthy young adults. SS for gastrocnemius was performed in...

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Autores principales: Maeda, Noriaki, Komiya, Makoto, Nishikawa, Yuichi, Morikawa, Masanori, Tsutsumi, Shogo, Tashiro, Tsubasa, Fukui, Kazuki, Kimura, Hiroaki, Urabe, Yukio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309794/
https://www.ncbi.nlm.nih.gov/pubmed/34300581
http://dx.doi.org/10.3390/s21144841
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author Maeda, Noriaki
Komiya, Makoto
Nishikawa, Yuichi
Morikawa, Masanori
Tsutsumi, Shogo
Tashiro, Tsubasa
Fukui, Kazuki
Kimura, Hiroaki
Urabe, Yukio
author_facet Maeda, Noriaki
Komiya, Makoto
Nishikawa, Yuichi
Morikawa, Masanori
Tsutsumi, Shogo
Tashiro, Tsubasa
Fukui, Kazuki
Kimura, Hiroaki
Urabe, Yukio
author_sort Maeda, Noriaki
collection PubMed
description This study aimed to evaluate motor unit recruitment during submaximal voluntary ramp contraction in the medial head of the gastrocnemius muscle (MG) by high-density spatial electromyography (SEMG) before and after static stretching (SS) in healthy young adults. SS for gastrocnemius was performed in 15 healthy participants for 2 min. Normalized peak torque by bodyweight of the plantar flexor, muscle activity at peak torque, and muscle activation patterns during ramp-up task were evaluated before and after SS. Motor unit recruitment during the submaximal voluntary contraction of the MG was measured using SEMG when performing submaximal ramp contractions during isometric ankle plantar flexion from 30 to 80% of the maximum voluntary contraction (MVC). To evaluate the changes in the potential distribution of SEMG, the root mean square (RMS), modified entropy, and coefficient of variation (CV) were calculated from the dense surface EMG data when 10% of the MVC force was applied. Muscle activation patterns during the 30 to 80% of MVC submaximal voluntary contraction tasks were significantly changed from 50 to 70% of MVC after SS when compared to before. The variations in motor unit recruitment after SS indicate diverse motor unit recruitments and inhomogeneous muscle activities, which may adversely affect the performance of sports activities.
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spelling pubmed-83097942021-07-25 Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task Maeda, Noriaki Komiya, Makoto Nishikawa, Yuichi Morikawa, Masanori Tsutsumi, Shogo Tashiro, Tsubasa Fukui, Kazuki Kimura, Hiroaki Urabe, Yukio Sensors (Basel) Article This study aimed to evaluate motor unit recruitment during submaximal voluntary ramp contraction in the medial head of the gastrocnemius muscle (MG) by high-density spatial electromyography (SEMG) before and after static stretching (SS) in healthy young adults. SS for gastrocnemius was performed in 15 healthy participants for 2 min. Normalized peak torque by bodyweight of the plantar flexor, muscle activity at peak torque, and muscle activation patterns during ramp-up task were evaluated before and after SS. Motor unit recruitment during the submaximal voluntary contraction of the MG was measured using SEMG when performing submaximal ramp contractions during isometric ankle plantar flexion from 30 to 80% of the maximum voluntary contraction (MVC). To evaluate the changes in the potential distribution of SEMG, the root mean square (RMS), modified entropy, and coefficient of variation (CV) were calculated from the dense surface EMG data when 10% of the MVC force was applied. Muscle activation patterns during the 30 to 80% of MVC submaximal voluntary contraction tasks were significantly changed from 50 to 70% of MVC after SS when compared to before. The variations in motor unit recruitment after SS indicate diverse motor unit recruitments and inhomogeneous muscle activities, which may adversely affect the performance of sports activities. MDPI 2021-07-15 /pmc/articles/PMC8309794/ /pubmed/34300581 http://dx.doi.org/10.3390/s21144841 Text en © 2021 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
Maeda, Noriaki
Komiya, Makoto
Nishikawa, Yuichi
Morikawa, Masanori
Tsutsumi, Shogo
Tashiro, Tsubasa
Fukui, Kazuki
Kimura, Hiroaki
Urabe, Yukio
Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title_full Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title_fullStr Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title_full_unstemmed Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title_short Effect of Acute Static Stretching on the Activation Patterns Using High-Density Surface Electromyography of the Gastrocnemius Muscle during Ramp-Up Task
title_sort effect of acute static stretching on the activation patterns using high-density surface electromyography of the gastrocnemius muscle during ramp-up task
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309794/
https://www.ncbi.nlm.nih.gov/pubmed/34300581
http://dx.doi.org/10.3390/s21144841
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