TY - JOUR
T1 - Effects of resistance training on classic and specific bioelectrical impedance vector analysis in elderly women
AU - Fukuda, David H.
AU - Stout, Jeffrey R.
AU - Moon, Jordan R.
AU - Smith-Ryan, Abbie E.
AU - Kendall, Kristina L.
AU - Hoffman, Jay R.
N1 - Publisher Copyright:
© 2015 Elsevier Inc.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - 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).
AB - 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).
KW - Aging
KW - BIVA
KW - Bioelectrical impedance
KW - Body composition
KW - Phase angle
KW - Resistance training
UR - http://www.scopus.com/inward/record.url?scp=84949599821&partnerID=8YFLogxK
U2 - 10.1016/j.exger.2015.12.002
DO - 10.1016/j.exger.2015.12.002
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C2 - 26657810
AN - SCOPUS:84949599821
SN - 0531-5565
VL - 74
SP - 9
EP - 12
JO - Experimental Gerontology
JF - Experimental Gerontology
ER -