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Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation

BACKGROUND: Muscle plasticity is an important topic in the fields of sport science and physical therapy. The purpose of this study was to examine whether muscle fascicle length increases with resistance training through a comparison between resistance-trained and untrained individuals. If a hypothes...

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Autores principales: Fukutani, Atsuki, Kurihara, Toshiyuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4499036/
https://www.ncbi.nlm.nih.gov/pubmed/26185743
http://dx.doi.org/10.1186/s40064-015-1133-1
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author Fukutani, Atsuki
Kurihara, Toshiyuki
author_facet Fukutani, Atsuki
Kurihara, Toshiyuki
author_sort Fukutani, Atsuki
collection PubMed
description BACKGROUND: Muscle plasticity is an important topic in the fields of sport science and physical therapy. The purpose of this study was to examine whether muscle fascicle length increases with resistance training through a comparison between resistance-trained and untrained individuals. If a hypothesis that fascicle length increases by resistance training is true, fascicle length should be longer in the resistance-trained individuals than in the untrained individuals. FINDINGS: Sixteen individuals (age, 21.3 ± 3.3 years; height, 1.74 ± 0.05 m; body mass, 83.6 ± 9.0 kg), who were either body builders or rugby players, were recruited as the training group, and 11 individuals (age, 20.3 ± 2.1 years; height, 1.70 ± 0.06 m; body mass, 54.0 ± 4.7 kg), who did not have regular resistance training experiences, were recruited as the control group. Fascicle length, pennation angle, and muscle thickness of the vastus lateralis and medial gastrocnemius were measured from ultrasonographic images. We found that the muscle thickness and pennation angles in the training group were significantly larger than those in the control group (p < 0.05). However, fascicle length did not significantly differ between the two groups (p > 0.05). CONCLUSIONS: These results indicate that fascicle length is not associated with muscle size, suggesting that fascicle length would not increase with resistance training.
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spelling pubmed-44990362015-07-16 Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation Fukutani, Atsuki Kurihara, Toshiyuki Springerplus Research BACKGROUND: Muscle plasticity is an important topic in the fields of sport science and physical therapy. The purpose of this study was to examine whether muscle fascicle length increases with resistance training through a comparison between resistance-trained and untrained individuals. If a hypothesis that fascicle length increases by resistance training is true, fascicle length should be longer in the resistance-trained individuals than in the untrained individuals. FINDINGS: Sixteen individuals (age, 21.3 ± 3.3 years; height, 1.74 ± 0.05 m; body mass, 83.6 ± 9.0 kg), who were either body builders or rugby players, were recruited as the training group, and 11 individuals (age, 20.3 ± 2.1 years; height, 1.70 ± 0.06 m; body mass, 54.0 ± 4.7 kg), who did not have regular resistance training experiences, were recruited as the control group. Fascicle length, pennation angle, and muscle thickness of the vastus lateralis and medial gastrocnemius were measured from ultrasonographic images. We found that the muscle thickness and pennation angles in the training group were significantly larger than those in the control group (p < 0.05). However, fascicle length did not significantly differ between the two groups (p > 0.05). CONCLUSIONS: These results indicate that fascicle length is not associated with muscle size, suggesting that fascicle length would not increase with resistance training. Springer International Publishing 2015-07-11 /pmc/articles/PMC4499036/ /pubmed/26185743 http://dx.doi.org/10.1186/s40064-015-1133-1 Text en © Fukutani and Kurihara. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Research
Fukutani, Atsuki
Kurihara, Toshiyuki
Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title_full Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title_fullStr Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title_full_unstemmed Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title_short Comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
title_sort comparison of the muscle fascicle length between resistance-trained and untrained individuals: cross-sectional observation
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4499036/
https://www.ncbi.nlm.nih.gov/pubmed/26185743
http://dx.doi.org/10.1186/s40064-015-1133-1
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