Body fat measurement in adolescent athletes: multicompartment molecular model comparison
Open Access
- 8 March 2006
- journal article
- research article
- Published by Springer Nature in European Journal of Clinical Nutrition
- Vol. 60 (8), 955-964
- https://doi.org/10.1038/sj.ejcn.1602405
Abstract
Objective: To assess the accuracy of air displacement plethysmography (ADP) and dual energy X-ray absorptiometry (DXA) per cent body fat (%BF) estimations in comparison with a reference five-compartment (5C) model used as the reference method. Design: Cross-sectional study. Setting: Outpatient University Laboratory, Lisbon, Portugal. Methods: A total of 32 girls (age: 15.1±0.3 years) and 46 boys (age: 15.3±1.2 years) athletes were measured. Body volume was assessed by ADP; bone mineral content was assessed by DXA; and total-body water was assessed by deuterium dilution. Statistical analyses included examination of the coefficient of correlation (r), standard error of estimation (s.e.e.), slope, intercept, and pure error (p.e.) and the agreement between models. Results: For boys and girls, differences between the 5C model and ADP %BF were 0.2 and 1.7% (r=0.86 and 0.98, s.e.e.=2.50 and 1.55%, p.e.=2.77 and 2.23%), respectively. Differences between the 5C model and DXA %BF were –1.0 and –3.7% (r=0.85 and 0.91, s.e.e.=2.60 and 2.91%, p.e.=2.90 and 4.66%), for boys and girls, respectively. For girls, regression between ADP and DXA against the reference method did not differ from the line of identity (P>0.05) while for boys differences were found (P<0.05). Dual energy X-ray absorptiometry overestimated %BF, particularly in girls. For both genders, large limits of agreement were found between the reference method and both techniques, with the exception of ADP in female athletes. Conclusion: We conclude that the two techniques were not precise for individual %BF prediction, though ADP revealed better agreement for girls. However, considering all performance criteria for the mean group, our analysis highlights ADP as a valid and nonbiased tool for the evaluation of body composition in adolescent athletes.Keywords
This publication has 57 references indexed in Scilit:
- Comparison of body composition methods in overweight and obese childrenJournal of Applied Physiology, 2003
- QDR 4500A DXA overestimates fat-free mass compared with criterion methodsJournal of Applied Physiology, 2003
- Validation of body composition estimates in male and female distance runners using estimates from a four-component modelAmerican Journal of Human Biology, 2000
- A Comparison of Air Displacement Plethysmography with Three Other Techniques to Determine Body Fat in Healthy AdultsJournal of Parenteral and Enteral Nutrition, 1999
- Anomalies in dual energy X-ray absorptiometry measurements of total-body bone mineral during weight change using Lunar, Hologic and Norland instruments.The British Journal of Radiology, 1999
- Six-compartment body composition model: Inter-method comparisons of total body fat measurementInternational Journal of Obesity, 1998
- Dual-energy X-ray absorptiometry results differ between machinesThe Lancet, 1995
- High-Precision Determination of 2H/1H in H2 and H2O by Continuous-Flow Isotope Ratio Mass SpectrometryAnalytical Chemistry, 1995
- A comparison of methods to predict minimal weight in high school wrestlersMedicine & Science in Sports & Exercise, 1993
- STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENTThe Lancet, 1986