Preferable percentage body fat estimation equation for Japanese athletic children : comparison using Japanese and non-Japanese specific equations

Kagawa, Masaharu, Tahara, Yasuaki, Tsunawake, Noriaki, Moji, Kazuhiko, & Hills, Andrew P. (2008) Preferable percentage body fat estimation equation for Japanese athletic children : comparison using Japanese and non-Japanese specific equations. International Journal of Body Composition Research, 6(4), pp. 193-200.

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Objectives: To compare estimated percentage body fat (%BF) values from available equations and determine the preferable equation to be used in athletic and non-athletic Japanese children and adolescents. Methods: Body density (BD) of 250 non-athletic and 234 athletic boys and 292 non-athletic and 180 athletic girls (less than 18 years old) was determined by the underwater weighing method (UWW) and %BF estimated using the following equations: (1) Siri (Eq(Siri)), (2) Brozek et al. (Eq(Brozek)), (3) Lohman et al. (Eq(Lohman84)), (4) age- and gender-specific Lohman (Eq(Lohman86)) and (5) Tobe et al. (Eq(Tobe)). Using %BF values estimated from Japanese-specific Eq(Tobe) as the reference, estimated %BF values and estimation patterns were compared. Also, using < 5% in boys and < 15% in girls as a minimum level for ‘essential lipids’ and using the sum of two skinfolds developed for Japanese as criterion for obesity, likelihood of underestimation and sensitivity/specificity using each equation were determined. -- Results: Estimated %BF from the tested equations were significantly different to each other (P<0.01). Compared to Eq(Tobe), Eq(Brozek) and Eq(Lohman84) showed a considerable over- and underestimation in children with low %BF. Also Eq(Lohman86) showed gender differences in estimation pattern which may be attributed to ethnic differences in the timing of puberty. For athletic groups, proportions of underestimated individuals reduces when using Eq(Siri). -- Conclusion: Although further confirmation is required, Eq(Tobe) may be the preferred choice for %BF estimation in non-athletic Japanese children and Eq(Siri) for children who participate in regular physical training.

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ID Code: 18567
Item Type: Journal Article
Refereed: Yes
Keywords: Body density, Percentage body fat, Estimation equation, Japanese, Athletic
ISSN: 1479-456X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NUTRITION AND DIETETICS (111100) > Nutrition and Dietetics not elsewhere classified (111199)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: © 2008 Smith-Gordon
Deposited On: 23 Apr 2009 02:37
Last Modified: 29 Feb 2012 13:50

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