Have a personal or library account? Click to login

Influence of acute water ingestion and prolonged standing on raw bioimpedance and subsequent body fluid and composition estimates

Journal of Electrical Bioimpedance
Volume 13 (2022): Issue 1 (January 2022)
By:
Open Access
|May 2022

Figures & Tables

Fig.1

Body Mass and Total Body Composition. Changes between baseline and subsequent time points are displayed for body mass (A – B), fat mass (C – D), and lean body mass (E – F). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, and E. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.
Body Mass and Total Body Composition. Changes between baseline and subsequent time points are displayed for body mass (A – B), fat mass (C – D), and lean body mass (E – F). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, and E. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.

Fig.2

Raw Bioimpedance at 50 kHz. Changes between baseline and subsequent time points are displayed for right arm impedance at the 50 kHz measurement frequency (A – B), trunk impedance at the 50 kHz measurement frequency (C – D), right leg impedance at the 50 kHz measurement frequency (E – F), and whole body phase angle at the 50 kHz frequency (G – H). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, E, and G. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.
Raw Bioimpedance at 50 kHz. Changes between baseline and subsequent time points are displayed for right arm impedance at the 50 kHz measurement frequency (A – B), trunk impedance at the 50 kHz measurement frequency (C – D), right leg impedance at the 50 kHz measurement frequency (E – F), and whole body phase angle at the 50 kHz frequency (G – H). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, E, and G. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.

Fig.3

Body Fluids. Changes between baseline and subsequent time points are displayed for total body water (A – B), intracellular water (C – D), and extracellular water (E – F). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, and E. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.
Body Fluids. Changes between baseline and subsequent time points are displayed for total body water (A – B), intracellular water (C – D), and extracellular water (E – F). Linear mixed model coefficients (b) and their 95% confidence intervals are displayed in panels A, C, and E. For all models, the reference groups were control (i.e., no water consumption) for condition and the baseline assessment for time. * indicates p ≤ 0.05; ** indicates p ≤ 0.01; *** indicates p ≤ 0.001.

Participant characteristics_ Data presented as mean ± SD_

All (n=20)Females (n=10)Males (n=10)
Age (y)22.2 ± 2.721.1 ± 1.623.2 ± 3.3
Height (cm)172.9 ± 10.4166.2 ± 6.1179.6 ± 9.5
Weight (kg)73.3 ± 20.459.0 ± 8.487.6 ± 18.8
BMI (kg/m2)24.1 ± 4.321.3 ± 2.327.0 ± 4.1
Body fat (%)21.8 ± 5.523.0 ± 4.020.5 ± 6.6

j_joeb-2022-0003_tab_002

ConditionTimeCondition*Time
Body mass0.0003<0.0001<0.0001
Total body water0.060.00030.63
Intracellular water0.08<0.00010.36
Extracellular water0.060.260.90
Dry lean mass0.24<0.00010.11
Fat mass<0.0001<0.0001<0.0001
Lean body mass0.090.00010.45
Skeletal muscle mass0.07<0.00010.42
Body fat percentage<0.0001<0.00010.0001
Right arm lean body mass0.00030.0020.49
Left arm lean body mass0.020.010.54
Trunk lean body mass0.010.0020.55
Right leg lean body mass0.760.00010.29
Left leg lean body mass0.98<0.00010.86
Right arm total body water0.00030.0010.37
Left arm total body water0.020.010.43
Trunk total body water0.010.0020.63
Right leg total body water0.76<0.00010.18
Left leg total body water0.95<0.00010.92
Right arm intracellular water0.0010.0030.49
Left arm intracellular water0.020.020.60
Trunk intracellular water0.01<0.00010.72
Right leg intracellular water0.910.540.04
Left leg intracellular water0.950.110.28
Right arm extracellular water0.00020.0010.20
Left arm extracellular water0.030.010.10
Trunk extracellular water0.000.250.37
Right leg extracellular water0.67<0.00010.19
Left leg extracellular water0.87<0.00010.80
Right arm fat mass0.00<0.00010.01
Left arm fat mass0.00<0.00010.001
Trunk fat mass<0.0001<0.0001<0.0001
Right leg fat mass<0.0001<0.00010.0003
Left leg fat mass<0.0001<0.00010.04
Visceral adipose tissue area0.0001<0.0001<0.0001
Right arm Z at 1 kHz0.0002<0.0001<0.0001
Left arm Z at 1 kHz0.001<0.0001<0.0001
Trunk Z at 1 kHz0.500.220.08
Right leg Z at 1 kHz0.24<0.00010.01
Left leg Z at 1 kHz0.36<0.00010.08
Right arm Z at 5 kHz0.00<0.0001<0.0001
Left arm Z at 5 kHz0.00<0.0001<0.0001
Trunk Z at 5 kHz0.340.090.12
Right leg Z at 5 kHz0.25<0.00010.03
Left leg Z at 5 kHz0.34<0.00010.02
Right arm Z at 50 kHz0.00020.0002<0.0001
Left arm Z at 50 kHz0.0020.0010.0001
Trunk Z at 50 kHz0.240.160.12
Right leg Z at 50 kHz0.25<0.00010.05
Left leg Z at 50 kHz0.36<0.00010.01
Right arm Z at 250 kHz0.00010.0010.0004
Left arm Z at 250 kHz0.0010.00040.001
Trunk Z at 250 kHz0.300.470.13
Right leg Z at 250 kHz0.24<0.00010.08
Left leg Z at 250 kHz0.33<0.00010.002
Right arm Z at 500 kHz0.00010.00080.001
Left arm Z at 500 kHz0.0020.00010.002
Trunk Z at 500 kHz0.220.670.11
Right leg Z at 500 kHz0.22<0.00010.08
Left leg Z at 500 kHz0.25<0.00010.001
Right arm Z at 1000 kHz0.00010.0010.001
Left arm Z at 1000 kHz0.00<0.00010.01
Trunk Z at 1000 kHz0.390.890.09
Right leg Z at 1000 kHz0.18<0.00010.05
Left leg Z at 1000 kHz0.33<0.00010.004
Right arm Xc at 5 kHz0.0004<0.0001<0.0001
Left arm Xc at 5 kHz0.001<0.00010.0002
Trunk Xc at 5 kHz0.510.00040.21
Right leg Xc at 5 kHz0.22<0.00010.05
Left leg Xc at 5 kHz0.28<0.00010.29
Right arm Xc at 50 kHz0.00<0.0001<0.0001
Left arm Xc at 50 kHz0.01<0.00010.001
Trunk Xc at 50 kHz0.770.030.18
Right leg Xc at 50 kHz0.29<0.00010.01
Left leg Xc at 50 kHz0.33<0.00010.01
Right arm Xc at 250 kHz0.070.710.005
Left arm Xc at 250 kHz0.0010.020.0001
Trunk Xc at 250 kHz0.300.460.14
Right leg Xc at 250 kHz0.25<0.00010.01
Left leg Xc at 250 kHz0.17<0.00010.01
Right arm ϕ0.290.010.002
Left arm ϕ0.450.0020.17
Trunk ϕ0.620.120.13
Right leg ϕ0.41<0.00010.02
Left leg ϕ0.41<0.00010.01
Whole body ϕ0.330.010.0004
Urine specific gravity0.030.0040.0004
DOI: https://doi.org/10.2478/joeb-2022-0003 | Journal eISSN: 1891-5469
Journal RSS Feed
Language: English
Page range: 10 - 20
Submitted on: Mar 2, 2022
Published on: May 20, 2022
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Keywords:
Bioelectrical impedance analysis,
hydration,
body composition,
body fat,
muscle mass
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2022 Grant M. Tinsley, Matthew T. Stratton, Patrick S. Harty, Abegale D. Williams, Sarah J. White, Christian Rodriguez, Jacob R. Dellinger, Baylor A. Johnson, Robert W. Smith, Eric T. Trexler, published by University of Oslo
This work is licensed under the Creative Commons Attribution 4.0 License.

Previous articleVolume 13 (2022): Issue 1 (January 2022)Next article