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. 2016 Nov 15;72(9):1180–1186. doi: 10.1093/gerona/glw225

Figure 1.

Figure 1.

(A) Upper panel: Electrode placements of segmental bioelectrical impedance spectroscopy (S-BIS) measurement for a single leg. Lower panel: Schematic representation showing muscle mass detection by dual-energy x-ray absorptiometry (DXA) and S-BIS. DXA measures appendicular lean mass and cannot inform about lean mass composition. (B) S-BIS takes advantage of the partitioning of contents in appendicular skeletal muscle between intracellular and extracellular pools. (C) Representative Cole–Cole plot of resistance versus reactance measures obtained by leg S-BIS from one individual from the study cohort. The intracellular resistance (RI) was calculated using 1/[(1/R∞) − (1/R0)]. (D) Representative frequency versus reactance measures obtained by leg S-BIS from 29, 56, and 76-year-old female adults (solid line, dashed line, and chain line, respectively). Older adults tended to have lower reactance.