Estimation of appendicular muscle mass and fat mass by near infrared spectroscopy in older persons
Article first published online: 13 FEB 2012
© 2012 Japan Geriatrics Society
Geriatrics & Gerontology International
Volume 12, Issue 4, pages 652–658, October 2012
How to Cite
Yoshida, D., Shimada, H., Harada, A., Matsui, Y., Sakai, Y. and Suzuki, T. (2012), Estimation of appendicular muscle mass and fat mass by near infrared spectroscopy in older persons. Geriatrics & Gerontology International, 12: 652–658. doi: 10.1111/j.1447-0594.2011.00834.x
- Issue published online: 24 SEP 2012
- Article first published online: 13 FEB 2012
- Accepted for publication 27 December 2011.
- body composition;
- body fat;
- skeletal muscles
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; ••: ••–••.