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Estimation of appendicular muscle mass and fat mass by near infrared spectroscopy in older persons
Author(s) -
Yoshida Daisuke,
Shimada Hiroyuki,
Harada Atsushi,
Matsui Yasumoto,
Sakai Yoshihito,
Suzuki Takao
Publication year - 2012
Publication title -
geriatrics and gerontology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 57
eISSN - 1447-0594
pISSN - 1444-1586
DOI - 10.1111/j.1447-0594.2011.00834.x
Subject(s) - medicine , muscle mass , biceps , dual energy x ray absorptiometry , fat mass , sarcopenia , anatomy , body mass index , bone mineral , osteoporosis
Aim: Near infrared spectroscopy has been reported to have a high reliability and accuracy in assessing the percentage of body fat. However, whether muscle mass can be accurately estimated using this method has not been established. This study examined whether a near infrared spectroscopy method could estimate appendicular muscle mass and fat mass, with dual‐energy X‐ray absorptiometry as the standard method for comparison. Methods: A total of 20 orthopedic inpatients (mean age 73.2 ± 6.8 years) were recruited for this study. Their body composition was assessed using near infrared spectroscopy and dual‐energy X‐ray absorptiometry. Appendicular muscle mass and fat mass were estimated from height, weight and optical densities. Results: The optical densities for the upper arm (biceps, triceps) and forearm (flexor carpi radialis) were significantly correlated with appendicular muscle mass ( r = 0.534 to 0.623) or fat mass ( r = −0.483 to −0.827). Estimated appendicular muscle mass and fat mass explained 89% and 80% of the variance in the dual‐energy X‐ray absorptiometry‐derived muscle mass and fat mass estimates using height, weight and optical density values of the proximal flexor carpi radialis. Conclusions: Near infrared spectroscopy is a useful method to assess not only fat mass, but also muscle mass in older adults. Geriatr Gerontol Int 2012; ••: ••–•• .