Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men

Yuya Watanabe,1 Yosuke Yamada,1,2 Yoshihiro Fukumoto,3 Tatsuro Ishihara,4 Keiichi Yokoyama,1 Tsukasa Yoshida,1 Motoko Miyake,1 Emi Yamagata,5 Misaka Kimura1 1Laboratory of Sports and Health Science, Kyoto Prefectural University of Medicine, Kyoto, Japan; 2Research Fellow, Japan Society for the Promo...

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Autores principales:	Watanabe Y, Yamada Y, Fukumoto Y, Ishihara T, Yokoyama K, Yoshida T, Miyake M, Yamagata E, Kimura M
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	sarcopenia echo intensity ultrasonography elderly Geriatrics RC952-954.6
Acceso en línea:	https://doaj.org/article/d342a7406ce5444da9c36d6697b742ea
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spelling	oai:doaj.org-article:d342a7406ce5444da9c36d6697b742ea2021-12-02T02:33:08ZEcho intensity obtained from ultrasonography images reflecting muscle strength in elderly men1178-1998https://doaj.org/article/d342a7406ce5444da9c36d6697b742ea2013-07-01T00:00:00Zhttps://www.dovepress.com/echo-intensity-obtained-from-ultrasonography-images-reflecting-muscle--peer-reviewed-article-CIAhttps://doaj.org/toc/1178-1998Yuya Watanabe,1 Yosuke Yamada,1,2 Yoshihiro Fukumoto,3 Tatsuro Ishihara,4 Keiichi Yokoyama,1 Tsukasa Yoshida,1 Motoko Miyake,1 Emi Yamagata,5 Misaka Kimura1 1Laboratory of Sports and Health Science, Kyoto Prefectural University of Medicine, Kyoto, Japan; 2Research Fellow, Japan Society for the Promotion of Science, Tokyo, Japan; 3Faculty of Rehabilitation, Kobe Gakuin University, Kobe, Japan; 4Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan; 5Laboratory of Gerontological Nursing, Kyoto Prefectural University of Medicine, Kyoto, Japan Background: It is well known that loss of muscle mass (quantitative change) is a major change that occurs with aging. Qualitative changes in skeletal muscle, such as increased intramuscular fat, also occur as one ages. Enhanced echo intensity (EI) on ultrasonography images of skeletal muscle is believed to reflect muscle quality. Recent studies evaluating the quality of skeletal muscle using computer-aided gray scale analysis showed that EI is associated with muscle strength independently of age or muscle size in middle-aged and elderly women. The aim of the present study was to investigate whether muscle quality based on EI is associated with muscle strength independently of muscle size for elderly men. Methods: A total of 184 elderly men (65–91 years) living independently in Kyoto, Japan, participated in this study. The EI, muscle thickness (MT), and subcutaneous fat thickness (FT) of the anterior compartment of the right thigh were determined by assessing ultrasonography images. The maximum isometric torque of knee extension at a knee angle of 90° was measured. Results: The EI showed a significant negative correlation with muscle strength (r = -0.333, P < 0.001). Multivariate regression analysis revealed that the MT and EI of the knee extensor muscle were independently associated with maximum isometric knee extension strength. Even when partial correlation analysis was performed with age, height, weight, and FT as control variables, EI was still significantly correlated with muscle strength. Conclusion: The results of this study indicate that aging-related changes in muscle quality contribute to diminishing muscle strength. Ultrasonography is a low-cost, easily accessible, and safe method suitable for the assessment of EI as an index of muscle quality. Keywords: echogenicity, sarcopenia, ultrasound imagingWatanabe YYamada YFukumoto YIshihara TYokoyama KYoshida TMiyake MYamagata EKimura MDove Medical Pressarticlesarcopeniaecho intensityultrasonographyelderlyGeriatricsRC952-954.6ENClinical Interventions in Aging, Vol Volume 8, Pp 993-998 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	sarcopenia echo intensity ultrasonography elderly Geriatrics RC952-954.6
spellingShingle	sarcopenia echo intensity ultrasonography elderly Geriatrics RC952-954.6 Watanabe Y Yamada Y Fukumoto Y Ishihara T Yokoyama K Yoshida T Miyake M Yamagata E Kimura M Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
description	Yuya Watanabe,1 Yosuke Yamada,1,2 Yoshihiro Fukumoto,3 Tatsuro Ishihara,4 Keiichi Yokoyama,1 Tsukasa Yoshida,1 Motoko Miyake,1 Emi Yamagata,5 Misaka Kimura1 1Laboratory of Sports and Health Science, Kyoto Prefectural University of Medicine, Kyoto, Japan; 2Research Fellow, Japan Society for the Promotion of Science, Tokyo, Japan; 3Faculty of Rehabilitation, Kobe Gakuin University, Kobe, Japan; 4Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan; 5Laboratory of Gerontological Nursing, Kyoto Prefectural University of Medicine, Kyoto, Japan Background: It is well known that loss of muscle mass (quantitative change) is a major change that occurs with aging. Qualitative changes in skeletal muscle, such as increased intramuscular fat, also occur as one ages. Enhanced echo intensity (EI) on ultrasonography images of skeletal muscle is believed to reflect muscle quality. Recent studies evaluating the quality of skeletal muscle using computer-aided gray scale analysis showed that EI is associated with muscle strength independently of age or muscle size in middle-aged and elderly women. The aim of the present study was to investigate whether muscle quality based on EI is associated with muscle strength independently of muscle size for elderly men. Methods: A total of 184 elderly men (65–91 years) living independently in Kyoto, Japan, participated in this study. The EI, muscle thickness (MT), and subcutaneous fat thickness (FT) of the anterior compartment of the right thigh were determined by assessing ultrasonography images. The maximum isometric torque of knee extension at a knee angle of 90° was measured. Results: The EI showed a significant negative correlation with muscle strength (r = -0.333, P < 0.001). Multivariate regression analysis revealed that the MT and EI of the knee extensor muscle were independently associated with maximum isometric knee extension strength. Even when partial correlation analysis was performed with age, height, weight, and FT as control variables, EI was still significantly correlated with muscle strength. Conclusion: The results of this study indicate that aging-related changes in muscle quality contribute to diminishing muscle strength. Ultrasonography is a low-cost, easily accessible, and safe method suitable for the assessment of EI as an index of muscle quality. Keywords: echogenicity, sarcopenia, ultrasound imaging
format	article
author	Watanabe Y Yamada Y Fukumoto Y Ishihara T Yokoyama K Yoshida T Miyake M Yamagata E Kimura M
author_facet	Watanabe Y Yamada Y Fukumoto Y Ishihara T Yokoyama K Yoshida T Miyake M Yamagata E Kimura M
author_sort	Watanabe Y
title	Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
title_short	Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
title_full	Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
title_fullStr	Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
title_full_unstemmed	Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
title_sort	echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/d342a7406ce5444da9c36d6697b742ea
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Echo intensity obtained from ultrasonography images reflecting muscle strength in elderly men

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