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Title: Skeletal muscle quality assessed from echo intensity is associated with muscle strength of middle-aged and elderly persons.
Authors: Fukumoto, Yoshihiro
Ikezoe, Tome  kyouindb  KAKEN_id  orcid (unconfirmed)
Yamada, Yosuke
Tsukagoshi, Rui
Nakamura, Masatoshi
Mori, Natsuko
Kimura, Misaka
Ichihashi, Noriaki  kyouindb  KAKEN_id
Author's alias: 福元, 喜啓
Keywords: Ultrasound image
Muscle echo intensity
Muscle thickness
Muscle strength
Body composition
Issue Date: Apr-2012
Publisher: Springer-Verlag
Journal title: European journal of applied physiology
Volume: 112
Issue: 4
Start page: 1519
End page: 1525
Abstract: Enhanced echo intensity (EI) on an ultrasound image of skeletal muscle indicates changes in muscle quality, including increases in intramuscular fibrous and adipose tissues. However, it is not known whether muscle quality assessed from the EI of computer-aided gray-scale analysis of an ultrasound image is associated with the muscle strength or body composition of a subject. The objectives of this study were to investigate whether muscle quality assessed from EI measured using gray-scale analysis is associated with muscle strength independently of age or muscle thickness (MT), and to examine the relationship between muscle EI and body composition. Ninety-two healthy women with a mean age of 70.4 ± 5.5 years (range, 51-87 years) dwelling in Kyoto, Japan, participated in the study. The MT, subcutaneous fat thickness (FT), and EI of the quadriceps femoris on the right extremity were assessed from transverse ultrasound images. Knee extensor isometric strength was used as a measure of the quadriceps femoris muscle strength. EI was significantly correlated with quadriceps strength independently of age or MT, and stepwise regression analysis revealed that MT and EI were independently associated with quadriceps strength. Importantly, EI showed no significant correlations with FT, percentage of body fat (%BF), or body mass index (BMI), while FT, BMI, and %BF did not significantly influence muscle strength. These data suggest that muscle quantity (i.e., MT) and muscle quality assessed from EI measured using computer-aided gray-scale analysis independently contribute to muscle strength in middle-aged and elderly persons.
Rights: The final publication is available at
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1007/s00421-011-2099-5
PubMed ID: 21847576
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