Title of article:
Appendicular skeletal muscle mass: Measurement with single frequency bioimpedance analysis (BIA).
Authors: Nuñez C, Gallagher D, Heymsfield SB.
Poster presented at: Annual NAASO meeting. 1997.
Abstract
Objective: Dual-energy X-ray absorptiometry (DXA) provides a validated approach to measuring appendicular skeletal muscle (ASM). The recent development of a 50 KHz BIA analyzer (TBF 105, Tanita Corp. Tokyo, Japan) presents a new way of quantifying leg skeletal muscle mass by simultaneously measuring body weight and impedance (Z) across both legs without application of gel electrodes. We hypothesized that Z measured across both legs is related to lower extremity ASM. The aim of the present study was to test this hypothesis by correlating lower extremity Z derived by Tanita BIA with ASM measured by DXA.
Design: Subjects were 90 males & 118 females ages 18-79 yrs. with BMI<30 kg/m2.
Results: The between-day CV for Z was 2.2% (n=5) and there was a high correlation (n=9; r=0.96, p<0.001) between Tanita-measured Z and lower extremity Z measured with conventional BIA/gel electrodes. There was a highly significant correlation (r=0.89,p<0.001) between height2/Tanita-Z and lower extremity ASM. A significant but lower correlation was observed between anthropometric thigh+calf muscle area and lower extremity ASM (r=0.86,p<0.001). These results suggest that the new non-gel electrode BIA system may provide a reliable and practical method of estimating leg skeletal muscle mass that requires only minimal technician training.
Comments and Key points
Regarding skeletal muscle measurement of the legs, the Tanita scale seemed to work well. Can't think of anything extra to add.
References
- http://www.tanita.com/professional/abstracts/abstract_main.html
Review & comments by Steven B. Halls, MD, Last edited 26-May-2008 Copyright.
And zip on back to the bibliography index of related body fat scale science.
