Fat-Free Mass and Percent Body Fat Assessments by Dual-Energy X-ray Absorptiometry, Densitometry and Total Body Water

1993 ◽  
pp. 71-74
Author(s):  
Rita Wellens ◽  
Alex F. Roche ◽  
Shumei Guo ◽  
William C. Chumlea ◽  
Roger M. Siervogel
Keyword(s):  
Body Fat ◽  
Total Body Water ◽  
Dual Energy ◽  
Body Water ◽  
Fat Free Mass ◽  
Percent Body Fat ◽  
X Ray ◽  
Total Body

Four-Component Model of Body Composition in Chronic Renal Failure Comprising Dual-Energy X-ray Absorptiometry and Measurement of Total Body Water by Deuterium Oxide Dilution

1996 ◽  
Vol 91 (6) ◽  
pp. 763-769 ◽  
Author(s):  
Graham Woodrow ◽  
Brian Oldroyd ◽  
John H. Turney ◽  
Peter S. W. Davies ◽  
Janice M. E. Day ◽  
...  
Keyword(s):  
Renal Failure ◽  
Chronic Renal Failure ◽  
Total Body Water ◽  
Dual Energy ◽  
Body Water ◽  
Fat Free Mass ◽  
Component Model ◽  
X Ray ◽  
Four Component Model ◽  
Total Body

1. Assessment of nutrition in patients with chronic renal failure by body composition measurement techniques may be affected by variable hydration. 2. This study aimed to derive a four-component model of body composition (consisting of fat, protein, total body water and body mineral) from a combination of dual-energy X-ray absorptiometry and total body water measured by deuterium oxide dilution, allowing assessment of body protein stores without the effect of variation in hydration. Patients with chronic renal failure on haemodialysis, peritoneal dialysis and conservative treatment and a control group were studied. Patients with chronic renal failure were at an ‘ideal’ state of hydration on clinical assessment. 3. Hydration was defined by total body water as a percentage of fat-free mass measured by dual-energy X-ray absorptiometry, and no differences were found between chronic renal failure subgroups and control subjects (except in the female undialysed chronic renal failure subgroup). Hydration was significantly correlated with percentage total body fat in the control groups but not in patients with chronic renal failure. 4. Lean tissue measured by dual-energy X-ray absorptiometry was significantly reduced in three of the six chronic renal failure groups compared with control subjects (male and female patients on haemodialysis and female patients on peritoneal dialysis). Protein estimated from the four-component model failed to detect these abnormalities. 5. Lean tissue measured by dual-energy X-ray absorptiometry in normal subjects strongly correlated with fat-free mass measured by total body potassium in normal subjects (male r = 0.91; female r = 0.89, both P < 0.0001). The correlation of protein estimated from the four-component model with fat-free mass measured by total body potassium was far weaker in male control subjects (r = 0.51, P < 0.05) and not significant in female control subjects (r = 0.38, P not significant). In the normal subjects protein estimated from the four-component model showed a much greater variation from protein estimated by total body potassium than did protein estimated simply as 27% of dual-energy X-ray absorptiometry fat-free mass minus total body mineral. 6. Hydration in patients with chronic renal failure in whom fluid balance is believed to be normal on clinical criteria does not differ from that in normal subjects. The combined model of dual-energy X-ray absorptiometry and total body water is not a useful method for the measurement of body protein.

scholarly journals Increased extracellular water compartment, relative to intracellular water compartment, after weight reduction

1999 ◽  
Vol 87 (1) ◽  
pp. 294-298 ◽  
Author(s):  
Wouter D. Van Marken Lichtenbelt ◽  
Mikael Fogelholm
Keyword(s):  
Body Fat ◽  
Weight Reduction ◽  
Total Body Water ◽  
Weight Maintenance ◽  
Premenopausal Women ◽  
Body Water ◽  
Intracellular Water ◽  
Fat Free Mass ◽  
Water Compartment ◽  
Total Body

The hydration of fat free mass (FFM) and extracellular (ECW) and intracellular water (ICW) compartments were studied in 30 obese premenopausal women before and after a 3-mo weight-reduction program and again after a 9-mo weight-maintenance program. Body fat was determined by a four-compartment model. Total body water and ECW were determined by deuterium dilution and bromide dilution, respectively. After the weight-reduction period, mean weight loss was 12.8 kg, and body fat was reduced on average by 10.9 kg. During weight maintenance, changes in body mass and body fat were not significant. Before weight reduction, mean ECW/ICW ratio was relatively high (0.78 ± 0.10). During the the study, total body water and ICW did not change significantly. ECW did not change significantly after weight reduction, but 12 mo after the start ECW was significantly increased by 1 liter. The ECW/ICW ratio increased to 0.87 ± 0.12 ( month 12). The hydration of the FFM increased from 74 ± 1 to 77 ± 2% during the weight reduction and remained elevated during weight maintenance. In conclusion, the ECW/ICW ratio and the hydration of the FFM, did not normalize during weight reduction and weight maintenance.

scholarly journals Comparison of Dual-Energy X-Ray Absorptiometry (DXA) versus a Multi-frequency Bioelectrical Impedance (InBody 770) Device for Body Composition Assessment after a 4-Week Hypoenergetic Diet

2019 ◽  
Vol 4 (2) ◽  
pp. 23 ◽  
Author(s):  
Antonio ◽  
Kenyon ◽  
Ellerbroek ◽  
Carson ◽  
Burgess ◽  
...  
Keyword(s):  
Body Composition ◽  
Energy Intake ◽  
Body Fat ◽  
Fat Mass ◽  
Bioelectrical Impedance ◽  
Dual Energy ◽  
Fat Free Mass ◽  
Percent Body Fat ◽  
Men And Women ◽  
X Ray

The purpose of this investigation was to compare two different methods of assessing body composition (i.e., a multi-frequency bioelectrical impedance analysis (MF-BIA) and dual-energy x-ray absorptiometry (DXA)) over a four-week treatment period in exercise-trained men and women. Subjects were instructed to reduce their energy intake while maintaining the same exercise regimen for a period of four weeks. Pre and post assessments for body composition (i.e., fat-free mass, fat mass, percent body fat) were determined via the MF-BIA and DXA. On average, subjects reduced their energy intake by ~18 percent. The MF-BIA underestimated fat mass and percentage body fat and overestimated fat-free mass in comparison to the DXA. However, when assessing the change in fat mass, fat-free mass or percent body fat, there were no statistically significant differences between the MF-BIA vs. DXA. Overall, the change in percent body fat using the DXA vs. the MF-BIA was −1.3 ± 0.9 and −1.4 ± 1.8, respectively. Our data suggest that when tracking body composition over a period of four weeks, the MF-BIA may be a viable alternative to the DXA in exercise-trained men and women.

scholarly journals Body composition of lactating women determined by anthropometry and deuterium dilution

1989 ◽  
Vol 61 (1) ◽  
pp. 25-33 ◽  
Author(s):  
William W. Wong ◽  
Nancy F. Butte ◽  
E. O'brian Smith ◽  
Cutberto Garza ◽  
Peter D. Klein
Keyword(s):  
Human Milk ◽  
Water Vapour ◽  
Body Fat ◽  
Total Body Water ◽  
Biological Fluids ◽  
Body Water ◽  
Fat Free Mass ◽  
Lactating Women ◽  
Deuterium Dilution ◽  
Total Body

1. Body fat, fat-free mass and total body water of ten lactating women were estimated from deuterium-dilution spaces and from skinfold thickness measurements. Deuterium-dilution spaces were calculated from the 6 h (equilibration) and zero-time (extrapolation) deuterium enrichments in saliva, urine, human milk and breath water vapour samples.2. The deuterium spaces obtained by equilibration were statistically larger than those obtained by extrapolation. Isotope dilution spaces derived from deuterium enrichments in saliva, breath water vapour and human milk did not differ with the exception of the 6 h equilibration value of milk, which was greater than that estimated from saliva. Deuterium-dilution spaces estimated from urine were consistently smaller than those derived from the other biological fluids.3. No significant differences in body fat, fat-free mass and total body water were observed between anthropometric measurements and deuterium-dilution methods, except for extrapolated values derived from deuterium enrichments in urine.

scholarly journals Between-laboratory comparison of densitometry and bio-electrical impedance measurements

1994 ◽  
Vol 71 (3) ◽  
pp. 309-316 ◽  
Author(s):  
Paul Deurenberg ◽  
Klaas R. Westerterp ◽  
Erica J. M. Velthuis-Te Wierik
Keyword(s):  
Body Composition ◽  
Body Fat ◽  
Total Body Water ◽  
Electrical Impedance ◽  
Normal Weight ◽  
Body Water ◽  
Fat Free Mass ◽  
Lower Amount ◽  
Total Body ◽  
The Relationship

Body composition was measured in nine healthy, normal-weight, weight-stable subjects in three different research centres. In each centre the usual procedures for the measurements were followed. It revealed that the measurement procedures in the three centres were comparable. Body composition was measured in each centre between 09.00 and 13.00 hours after a light breakfast by densitometry (underwater weighing) and bio-electrical impedance. A single, total-body-water determination by D2O dilution was used as a reference value. Body fat determined by densitometry was significantly lower in one centre, which, however, could be completely explained by a lower body weight, probably due to water loss (the subjects refrained for a longer time from food and drinks before the measurements in that centre) and, thus, by violation of the assumptions of Siri's (1961) formula. Also, body impedance was slightly higher in that centre, indicating a lower amount of body water. Mean body fat from densitometry was also slightly lower in that centre compared with body fat determined by D2O dilution. Individual differences between body fat from densitometry and from total body water were relatively large, up to 7% body fat. The relationship between fat-free mass from densitometry and bio-electrical impedance was not different between the centres. It is concluded that differences in the relationship between body composition and bio-electrical impedance, as reported in the literature, may be due to differences in standardization procedures and/or differences in reference population.

226 BODY COMPOSITION BY HYDRODENSITOMETRY, DUAL ENERGY X-RAY ABSORPTIOMETRY AND TOTAL BODY WATER IN ADULTS

1994 ◽  
Vol 26 (Supplement) ◽  
pp. S40
Author(s):  
R. Wellens ◽  
A. F. Roche ◽  
H. Khamis ◽  
S. Guo ◽  
W. C. Chumlea ◽  
...  
Keyword(s):  
Body Composition ◽  
Total Body Water ◽  
Dual Energy ◽  
Body Water ◽  
X Ray ◽  
Total Body

scholarly journals Deuterium and Bromide Dilution, and Bioimpedance Spectrometry Independently Show That Growth Hormone-Deficient Adults Have an Enlarged Extracellular Water Compartment Related to Intracellular Water

1997 ◽  
Vol 82 (3) ◽  
pp. 907-911 ◽  
Author(s):  
Wouter D. van Marken Lichtenbelt ◽  
Yvonne E. M. Snel ◽  
Robert-Jan M. Brummer ◽  
Hans P. F. Koppeschaar
Keyword(s):  
Body Fat ◽  
Total Body Water ◽  
Body Water ◽  
Intracellular Water ◽  
Percent Body Fat ◽  
Extracellular Water ◽  
Water Compartments ◽  
Water Compartment ◽  
Total Body ◽  
Gh Deficiency In Adults

Abstract GH has a strong influence on body composition. However, the effects of GH deficiency in adults on water compartments are not well understood. Therefore, extracellular water (ECW) and total body water were independently determined by deuterium and bromide dilution and by bioimpedance spectrometry in GH-deficient (GHD) adults and compared to those in controls, matched for age, sex, body weight, and height. The results show that the percent body fat was significantly (P &lt; 0.05) higher, and total body water and intracellular water (ICW) were significantly lower in GHD adults for males, females, and both sexes combined. ECW was not significantly different between the two groups. ECW/ICW in GHD adults (0.42 ± 0.03) was significantly (P &lt; 0.01) higher than that in controls (0.39 ± 0.02). There was a significant positive relation between the ECW/ICW ratio and the percent body fat. These results were confirmed by the bioimpedance spectrometry measurements.

Sign in / Sign up

Export Citation Format

Share Document