Comparison of percent body fat estimates using air displacement plethysmography and hydrodensitometry in adults and children

Demerath, Ellen W.; Guo, Shutao; Chumlea, W. C.; Towne, Bradford; Roche, Alex F.; Siervogel, Roger M.

doi:10.1038/sj.ijo.0801898

Cited by 111 publications

(105 citation statements)

References 17 publications

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“…The ADP and hydrostatic weighing densitometry agree within 1% BF in adults (Fields et al, 2002). ADP is a reliable and valid technique that can quickly and safely evaluate body composition (Demerath et al, 2002). The validity of ADP…”

Section: Discussionmentioning

confidence: 83%

Use of hand-to-hand impedancemetry to predict body composition of African women as measured by air displacement plethysmography

et al. 2004

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Objectives: To test the validity of a simple, rapid, field-adapted, portable hand-held impedancemeter (HHI) for the estimation of lean body mass (LBM) and percentage body fat (%BF) in African women, and to develop specific predictive equations. Design: Cross-sectional observational study. Settings: Dakar, the capital city of Senegal, West Africa. Subjects: A total sample of 146 women volunteered. Their mean age was of 31.0 y (s.d. 9.1), weight 60.9 kg (s.d. 13.1) and BMI 22.6 kg/m 2 (s.d. 4.5). Methods: Body composition values estimated by HHI were compared to those measured by whole body densitometry performed by air displacement plethysmography (ADP). The specific density of LBM in black subjects was taken into account for the calculation of %BF from body density. Results: Estimations from HHI showed a large bias (mean difference) of 5.6 kg LBM (Po10 À4 ) and À8.8 %BF (Po10 À4 ) and errors (s.d. of the bias) of 2.6 kg LBM and 3.7 %BF. In order to correct for the bias, specific predictive equations were developed. With the HHI result as a single predictor, error values were of 1.9 kg LBM and 3.7 %BF in the prediction group (n ¼ 100), and of 2.2 kg LBM and 3.6 %BF in the cross-validation group (n ¼ 46). Addition of anthropometrical predictors was not necessary. Conclusions: The HHI analyser significantly overestimated LBM and underestimated %BF in African women. After correction for the bias, the body compartments could easily be estimated in African women by using the HHI result in an appropriate prediction equation with a good precision. It remains to be seen whether a combination of arm and leg impedancemetry in order to take into account lower limbs would further improve the prediction of body composition in Africans.

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Section: Discussionmentioning

confidence: 83%

Use of hand-to-hand impedancemetry to predict body composition of African women as measured by air displacement plethysmography

et al. 2004

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“…Differences in body compsition P Deurenberg et al Demerath et al, 2002). Based on this information it is assumed that differences in body fat percentage between Singapore and the other two study sites are not due to methodological differences.…”

Section: Methodsmentioning

confidence: 99%

Differences in body composition between Singapore Chinese, Beijing Chinese and Dutch children

et al. 2003

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Objectives: To compare the relationship between body mass index (BMI) and body fat percentage (BF%) in children of different ethnic background. Design: Cross-sectional observational study. Settings: The study was performed in three different locations, Singapore, Beijing and Wageningen (The Netherlands). Subjects: In each centre 25 boys and 25 girls, aged 7 -12 y, were selected. They were matched on age, sex and body height. Methods: Body weight and body height was measured following standardized procedures. The body mass index (BMI) was calculated as weight=height squared (kg=m 2 ). Body fat was measured by densitometry in Beijing and Wageningen and by dual energy X-ray absorptiometry (DXA) in Singapore. The DXA measurements in Singapore were validated against densitometry. Results: There were no significant differences in BF% or BMI within each gender group across the three study sites. However, after controlling for (non-significant) differences in age and BF%, the Singapore children had a lower (mean AE s.e.) BMI (15.6 AE 0.3) than the Beijing 17.6 AE 0.3) and Wageningen (16.9 AE 0.3) children. For the same BMI, age and sex the Singapore children had a significant higher BF% (24.6 AE 0.7) than the Beijing (19.2 AE 0.8) and Wageningen (20.3 AE 0.7) children. Conclusions: The study strongly suggests that the relationship between BF% and BMI (or weight and height) is different among children of different ethnic background. Consequently growth charts and BMI cut-off points for underweight, overweight and obesity in children may have to be ethnic-specific.

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“…Fat mass and fat-free mass (FFM) were then determined using the following formula, %fat = (5.07/Db-4.64)·100 for females (Table 1). The air displacement plethysmography measure of body composition has been demonstrated to be valid in both adults and children (Demerath et al 2002).…”

Section: Methodsmentioning

confidence: 99%

Oxygen uptake kinetics in trained adolescent females

et al. 2014

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Little evidence exists with regard to the effect that exercise training has upon oxygen uptake kinetics in adolescent females. PURPOSE: The aim of the study was to compare 2 o V  and muscle deoxygenation kinetics in a group of trained (Tr) and untrained (Utr) female adolescents. METHOD: Twelve trained (6.4 ± 0.9 years training, 10.3 ± 1.4 months per year training, 5.2 ± 2.0 hours per week) adolescent female soccer players (Age: 14.6 ± 0.7 years) were compared to a group (n=8) of recreationally active adolescent girls (Age: 15.1 ± 0.6 years) of similar maturity status. Subjects underwent two, 6-min exercise transitions at a workload equivalent to 80% of lactate threshold from a 3-min baseline of 10W. All subjects had a passive rest period of 1 hour between each square-wave transition. Breath-by-breath oxygen uptake and muscle deoxygenation were measured throughout and were modelled via a monoexponential decay with a delay relative to the start of exercise. RESULT: Peak 2 o V  was significantly (p<0.05) greater in the Tr compared to the Utr (Tr: 43.2 ± 3.2 mL·kg -1 min -1 vs. Utr: 34.6 ± 4.0 mL·kg -1 min -1 ). The 2 o V  time constant was significantly (p<0.05) faster in the Tr compared to the Utr (Tr: 26 .3 ± 6.9 s vs. Utr: 35.1 ± 11.5 s). There was no inter-group difference in the time constant for muscle deoxygenation kinetics (Tr: 8.5 ± 3.0 s vs. Utr: 12.4 ± 8.3 s); a large effect size, however, was demonstrated (-0.804). CONCLUSION: Exercise training and/or genetic self-selection results in faster kinetics in trained adolescent females. The faster 2 o V  kinetics seen in the trained group may result from enhanced muscle oxygen utilisation.

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Comparison of percent body fat estimates using air displacement plethysmography and hydrodensitometry in adults and children

Cited by 111 publications

References 17 publications

Use of hand-to-hand impedancemetry to predict body composition of African women as measured by air displacement plethysmography

Use of hand-to-hand impedancemetry to predict body composition of African women as measured by air displacement plethysmography

Differences in body composition between Singapore Chinese, Beijing Chinese and Dutch children

Oxygen uptake kinetics in trained adolescent females

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