Effects Of Resistance Training On Classic And Specific Bioelectrical Impedance Vector Analysis In Elderly Women

Keywords

Aging; Bioelectrical impedance; BIVA; Body composition; Phase angle; Resistance training

Abstract

Raw bioelectrical impedance analysis (BIA) data [resistance (R); reactance (Xc)] through bioelectrical impedance vector analysis (BIVA) and phase angle (PhA) have been used to evaluate cellular function and hydration status. The purpose of this investigation was to examine the effects of resistance training (RT) on classic and specific BIVA in elderly women. Twenty women (mean±SD; age: 71.9 ± 6.9 years; BMI: 24.5±3.0 kg m-2) completed a 6-month RT program. Whole-body, single-frequency BIA, body geometry, and leg strength (5RM) measures were completed at baseline (t0), 3months (t3), and 6months (t6). The mean impedance vector displacements were compared using Hotelling's T2 test to evaluate changes in R and Xc relative to height (R/ht; Xc/ht) or body volume (Rsp; Xcsp) estimated from the arms, legs, and trunk. 5RM, PhA, and BIVA variables were compared using ANOVA. PhA improved at t6 (p<0.01), while 5RM improved at t3 and t6 (p<0.01). Using classic BIVA, 6 months (T2 = 31.6; p<0.01), but not 3months of RT (T2=4.5; p=0.20), resulted in significant vector migration. Using specific BIVA, 6months (T2=24.4; p<0.01), but not 3months of RT (T2=5.5; p=0.10), also resulted in significant vector migration. 5RM was correlated to both PhA (r=0.48-56) and Xcsp (r=0.45-53) at all time points. Vector displacements were likely the result of improved cellular integrity (Xcsp) and cellular health (PhA).

Publication Date

2-1-2016

Publication Title

Experimental Gerontology

Volume

74

Number of Pages

9-12

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.exger.2015.12.002

Socpus ID

84949599821 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84949599821

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