Relationship between cardiac autonomic activity following upper body exercise and total body water in men of different ages

2021 ◽  
Vol 14 (1) ◽  
pp. 108-118
Author(s):  
akram esfahaninia ◽  
Habib Asgharpour ◽  
Mehdi Ahmadian
Keyword(s):  
Total Body Water ◽  
Body Water ◽  
Upper Body ◽  
Autonomic Activity ◽  
Upper Body Exercise ◽  
Different Ages ◽  
Total Body ◽  
Cardiac Autonomic Activity

Effect of total body water estimates via bioimpedance on bod pod-based three-compartment body fat models

2021 ◽  
Author(s):  
Brett S. Nickerson ◽  
Samantha V. Narvaez ◽  
Mitzy I. Juarez ◽  
Stefan A. Czerwinski
Keyword(s):  
Body Fat ◽  
Total Body Water ◽  
Body Water ◽  
Bod Pod ◽  
Total Body

scholarly journals Effects of a 14-Day Hydration Intervention on Individuals with Habitually Low Fluid Intake

2021 ◽  
Author(s):  
Aaron R. Caldwell ◽  
Megan E. Rosa-Caldwell ◽  
Carson Keeter ◽  
Evan C. Johnson ◽  
François Péronnet ◽  
...  
Keyword(s):  
Body Weight ◽  
Total Body Water ◽  
Fluid Intake ◽  
Urine Volume ◽  
Urine Osmolality ◽  
Body Water ◽  
Control Group ◽  
Intervention Phase ◽  
Total Body ◽  
Experimental Group

<b><i>Background:</i></b> Debate continues over whether or not individuals with low total water intake (TWI) are in a chronic fluid deficit (i.e., low total body water) [<xref ref-type="bibr" rid="ref1">1</xref>]. When women with habitually low TWI (1.6 ± 0.5 L/day) increased their fluid intake (3.5 ± 0.1 L/day) for 4 days 24-h urine osmolality decreased, but there was no change in body weight, a proxy for total body water (TBW) [<xref ref-type="bibr" rid="ref2">2</xref>]. In a small (<i>n</i> = 5) study of adult men, there were no observable changes in TBW, as measured by bioelectrical impedance, after increasing TWI for 4 weeks [<xref ref-type="bibr" rid="ref3">3</xref>]. However, body weight increased and salivary osmolality decreased indicating that the study may have been underpowered to detect changes in TBW. Further, no studies to date have measured changes in blood volume (BV) when TWI is increased. <b><i>Objectives:</i></b> Therefore, the purpose of this study was to identify individuals with habitually low fluid intake and determine if increasing TWI, for 14 days, resulted in changes in TBW or BV. <b><i>Methods:</i></b> In order to identify individuals with low TWI, 889 healthy adults were screened. Participants with a self-reported TWI less than 1.8 L/day (men) or 1.2 L/day (women), and a 24-h urine osmolality greater than 800 mOsm were included in the intervention phase of the study. For the intervention phase, 15 participants were assigned to the experimental group and 8 participants were assigned to the control group. The intervention period lasted for 14 days and consisted of 2 visits to our laboratory: one before the intervention (baseline) and 14 days into the intervention (14-day follow-up). At these visits, BV was measured using a CO-rebreathe procedure and deuterium oxide (D<sub>2</sub>O) was administered to measure TBW. Urine samples were collected immediately prior, and 3–8 h after the D<sub>2</sub>O dose to allow for equilibration. Prior to each visit, participants collected 24-h urine to measure 24-h hydration status. After the baseline visit, the experimental group increased their TWI to 3.7 L for males and 2.7 L for females in order to meet the current Institute of Medicine recommendations for TWI. <b><i>Results:</i></b> Twenty-four-hour urine osmolality decreased (−438.7 ± 362.1 mOsm; <i>p</i> &#x3c; 0.001) and urine volume increased (1,526 ± 869 mL; <i>p</i> &#x3c; 0.001) in the experimental group from baseline, while there were no differences in osmolality (−74.7 ± 572 mOsm; <i>p</i> = 0.45), or urine volume (−32 ± 1,376 mL; <i>p</i> = 0.89) in the control group. However, there were no changes in BV (Fig. <xref ref-type="fig" rid="f01">1</xref>a) or changes in TBW (Fig. <xref ref-type="fig" rid="f01">1</xref>b) in either group. <b><i>Conclusions:</i></b> Increasing fluid intake in individuals with habitually low TWI increases 24-h urine volume and decreases urine osmolality but does not result in changes in TBW or BV. These findings are in agreement with previous work indicating that TWI interventions lasting 3 days [<xref ref-type="bibr" rid="ref2">2</xref>] to 4 weeks [<xref ref-type="bibr" rid="ref3">3</xref>] do not result in changes in TBW. Current evidence would suggest that the benefits of increasing TWI are not related changes in TBW.

Prediction of Total Body Water using Scaled Conjugate Gradient Artificial Neural Network

2020 ◽  
Author(s):  
Marife A. Rosales ◽  
Maria Gemel B. Palconit ◽  
Argel A. Bandala ◽  
Ryan Rhay P. Vicerra ◽  
Elmer P. Dadios ◽  
...  
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Conjugate Gradient ◽  
Total Body Water ◽  
Body Water ◽  
Scaled Conjugate Gradient ◽  
Artificial Neural ◽  
Total Body

Total Body Water in Rats and in Mice

1954 ◽  
Vol 87 (2) ◽  
pp. 454-456 ◽  
Author(s):  
J. Annegers
Keyword(s):  
Total Body Water ◽  
Body Water ◽  
Total Body

scholarly journals LONGITUDINAL MEASUREMENTS OF TOTAL BODY WATER AND GROWTH IN LOW-BIRTH-WEIGHT INFANTS

1992 ◽  
Vol 32 (5) ◽  
pp. 632-632
Author(s):  
Riccardo E Pfister ◽  
Jean-Léopold Michell ◽  
Yves Schutz ◽  
Eric Jéquier
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Total Body Water ◽  
Body Water ◽  
Low Birth Weight Infants ◽  
Longitudinal Measurements ◽  
Total Body

scholarly journals In vivo total body water assessment by total body electrical conductivity in rats suffering perturbations of water compartment equilibrium

1993 ◽  
Vol 70 (2) ◽  
pp. 433-438 ◽  
Author(s):  
N. Battistini ◽  
F. Virgili ◽  
G. Bedogni ◽  
G. R. Gambella ◽  
A. Bini
Keyword(s):  
Electrical Conductivity ◽  
Total Body Water ◽  
Body Water ◽  
Biliary Cirrhosis ◽  
Least Squares Regression ◽  
Water Compartment ◽  
Invasive Method ◽  
Total Body ◽  
Highly Correlated

Total body electrical conductivity (TOBEC) is a simple and non-invasive method for the assessment of body composition in vivo. Information regarding the applicability of TOBEC in the condition of abnormal fluid balance is scarce. In the present paper we give the results of the comparison between TOBEC and total body water (TBW; assessed by the tritium dilution technique) in three groups of animals: (1) healthy (n 17), (2) expanded fluid volume by secondary biliary cirrhosis (SBC; n 9) and (3) Fiirosemide®-treated rats (n 9). The TOBEC score and TBW by tritium dilution were found to be highly correlated in the pooled sample (r 0·90) and in normal (r 0.·87), SBC (r 0·73) and Furosemide-treated (r 0·89) rats. However, the relationship between TOBEC and TBW, described by least-squares regression analysis, was found to be similar for SBC and normal rats but was significantly different for Furosemide-treated and normal rats. These findings suggest that TOBEC is unable to track TBW accurately when the ratio between intracellular and extracellular water is chronically or acutely altered.

BODY WATER COMPARTMENTS IN THE PREMATURE INFANT, WITH SPECIAL REFERENCE TO THE EFFECTS OF THE RESPIRATORY DISTRESS SYNDROME AND OF MATERNAL DIABETES AND TOXEMIA

PEDIATRICS ◽  
1962 ◽  
Vol 29 (6) ◽  
pp. 883-889
Author(s):  
Wesley M. Clapp ◽  
L. Joseph Butterfield ◽  
Donough O'Brien
Keyword(s):  
Respiratory Distress Syndrome ◽  
Respiratory Distress ◽  
Total Body Water ◽  
Distress Syndrome ◽  
Body Water ◽  
Control Group ◽  
Extracellular Water ◽  
Water Compartments ◽  
Significant Difference ◽  
Total Body

Normal values for both total body water and extracellular water have been determined in 86 premature infants aged 1 to 90 days and weighing 940 to 2,435 gm, with use of the techniques of deuterium oxide and bromide dilution. Nine full-term infants aged 1 to 6 days and weighing 2,590 to 4,985 gm were similarly studied. Nine infants with the respiratory distress syndrome and eight infants of toxemic mothers studied in the first 24 hours of life showed no significant difference in their body water compartments in comparison to a control group of normal infants matched for age and weight. Seven infants of diabetic mothers studied in the first 24 hours of life showed a significant decrease in total body water, expressed as percentage of body weight, with a normal intracellular to extracellular water ratio. These data indirectly support other evidence that there is an increase in body fat in these infants at birth. See Table in the PDF file

Sign in / Sign up

Export Citation Format

Share Document