scholarly journals Determination of Percent Body Fat by the Newly Developed Sulfur Hexafluoride Dilution Method and Air Displacement Plethysmography.

1998 ◽  
Vol 44 (4) ◽  
pp. 561-568 ◽  
Author(s):  
Hiroko IWAOKA ◽  
Tetsuji YOKOYAMA ◽  
Takeo NAKAYAMA ◽  
Yasuhiro MATSUMURA ◽  
Yutaka YOSHITAKE ◽  
...  
Keyword(s):  
Body Fat ◽  
Sulfur Hexafluoride ◽  
Percent Body Fat ◽  
Dilution Method ◽  
Air Displacement Plethysmography

Influence of Cotton and Spandex Shorts on Air Displacement Plethysmography Estimates of Percent Body Fat

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S71
Author(s):  
Holly R. Hull ◽  
Lauren V. Peterson ◽  
Debra A. Bemben ◽  
Michael G. Bemben ◽  
David A. Fields
Keyword(s):  
Body Fat ◽  
Percent Body Fat ◽  
Air Displacement Plethysmography

Comparison of two hydrodensitometric methods for estimating percent body fat

2000 ◽  
Vol 88 (4) ◽  
pp. 1175-1180 ◽  
Author(s):  
Grant E. van der Ploeg ◽  
Simon M. Gunn ◽  
Robert T. Withers ◽  
Andrew C. Modra ◽  
Alan J. Crockett
Keyword(s):  
Correlation Coefficient ◽  
Body Fat ◽  
Intraclass Correlation ◽  
Percent Body Fat ◽  
Dilution Method ◽  
Associated Gas ◽  
Before And After ◽  
Residual Capacity ◽  
Helium Dilution ◽  
The Individual

This study compared the two following hydrodensitometric methods for estimating percent body fat (%BF): 1) estimation of residual volume (RV) by helium dilution before and after measurement of immersed mass at RV, and 2) determination of immersed mass at a comfortable level of expiration (approximately functional residual capacity) with measurement of the associated gas volume by oxygen dilution. Twelve men [27.9 ± 7.5 (SD) yr; 79.32 ± 12.79 kg; 180.5 ± 9.9 cm] were tested for %BF via both methods on each of two separate visits within 3 days by using a counterbalanced design. The two helium dilution measurements yielded a technical error of measurement of 0.2% BF and an intraclass correlation coefficient of 0.999. Corresponding values for the oxygen dilution method were 0.4% BF and 0.999, respectively. There was no difference ( P = 0.80) between the helium dilution (16.9 ± 9.3% BF) and oxygen dilution (16.9 ± 9.4% BF) methods, and the individual differences ranged from −0.7 to 0.6% BF. The interclass correlation coefficient between the two methods was 0.999 with a SE of estimate of 0.4% BF. Whereas both methods were precise and reliable and yielded similar results, the oxygen dilution technique was more expedient and was preferred by the subjects because they were not required to exhale to RV.

Comparison of Various Methods for Estimating Body Fat in Dogs

2004 ◽  
Vol 40 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Dianne I. Mawby ◽  
Joseph W. Bartges ◽  
Andre d’Avignon ◽  
Dorothy P. Laflamme ◽  
Tamberlyn D. Moyers ◽  
...  
Keyword(s):  
Body Fat ◽  
Body Condition Score ◽  
Deuterium Oxide ◽  
Visual Observation ◽  
Coefficient Of Determination ◽  
Percent Body Fat ◽  
Dilution Method ◽  
Morphometric Measurements ◽  
Methods Of Evaluation ◽  
Condition Score

Obesity is considered one of the most common forms of malnutrition occurring in dogs. Laboratory methods of evaluation of body composition in live dogs have included dual-energy X-ray absorptiometry (DEXA) and deuterium oxide (D2O) dilution. Clinical methods of evaluation include assigning a body condition score (BCS) based on visual observation, palpation, and morphometric measurements. This study used these four methods to evaluate 23 healthy, adult, client-owned dogs. Good correlation (coefficient of determination [r2]=0.78) was found between measurements of percent body fat (%BF) determined by the D2O dilution method and the DEXA scan. Percent body fat can also be estimated using BCS (r2=0.92 comparison with DEXA) or by using morphometric measurements with simple calculations (r2=0.92 comparison with DEXA).

Temperature regulation during rest and exercise in the cold in premenarcheal and menarcheal girls

2004 ◽  
Vol 96 (4) ◽  
pp. 1393-1398 ◽  
Author(s):  
Panagiota Klentrou ◽  
Melora Cunliffe ◽  
Jill Slack ◽  
Boguslaw Wilk ◽  
Oded Bar-Or ◽  
...  
Keyword(s):  
Core Temperature ◽  
Body Fat ◽  
Heat Production ◽  
Temperature Regulation ◽  
Maximal Oxygen Consumption ◽  
Rest Period ◽  
Cold Test ◽  
Percent Body Fat ◽  
Menstrual Phase

Temperature regulation during exercise in the cold was examined in 13 adolescent female individuals, aged 13-18 yr. Six girls with established menstrual cycles comprised the eumenorrheic menarcheal (EM) group, and seven nonmenstruating girls comprised the premenarcheal (PM) group. During the first visit, maximal oxygen consumption (V̇o2 max), height, weight, and percent body fat were measured. The second visit included a determination of metabolic rate in thermoneutrality (21°C), consisting of a 10-min rest period and 20 min of cycling (30% of V̇o2 max), and a cold test (5°C, 40% humidity, <0.3 m/s air velocity) involving a 20-min rest period and 40 min of cycling (30% of V̇o2 max). Subjects in the EM group were tested twice in the chamber: once during the follicular and once during the luteal phase. Heat production per kilogram in thermoneutrality and in the cold was significantly ( P < 0.05) higher in the PM compared with the EM girls. However, the PM girls had a significantly ( P < 0.05) lower core temperature in the cold than the EM group. PM girls also had a significantly higher body surface area-to-mass ratio compared with the EM girls. Although percent body fat between groups was not significantly different, within the PM group percent body fat explained 79% ( P < 0.01) of the variance in the decrease of core temperature. There were no menstrual phase-related differences in temperature regulation in either the thermoneutral or cold environment. In conclusion, menstrual phase does not influence temperature regulation in female individuals during adolescence. EM girls had lower metabolic heat production but maintained their core temperature more effectively in the cold than did the PM girls. This thermoregulatory difference between PM and EM girls is mainly a function of geometric differences with maturation-related peripheral vasoconstrictive differences maybe limiting the effectiveness of the mechanism of increased heat storage in younger female individuals.

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