Estimativa da gordura corporal através de equipamentos de bioimpedância, dobras cutâneas e pesagem hidrostática

Revista Brasileira de Medicina do Esporte (Impact Factor: 0.16). 01/2001; 7(4). DOI: 10.1590/S1517-86922001000400003
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    ABSTRACT: The purpose of this study was to analyze the efficiency of different anthropometric equations that identify excess body fat in children and adolescents. Methods The sample consisted of 1498 subjects (678 males and 820 females), aged 7 to 17 years (13.7 SD=2.0), from Presidente Prudente (SP). Body weight and height were measured to calculate body mass index. Waist circumference and triceps, abdominal, and thigh skinfold thicknesses were also measured. The percentage of body fat was estimated by four anthropometric equations: Slaughter et al., Slaughter II et al., Dezenberg et al., and Deurenberg et al.. The Receiver Operating Characteristic Curve was used to indicate the efficiency of these equations. Results High sensitivity values (82.4% to 100,0%) and high and low specificity scores (20.9% to 94.9%) were observed in males. In females, the sensitivity values ranged from moderate to high (72.2% to 99.4%) and the specificity scores were high (21.6% to 98.2%). Conclusion The Deurenberg et al., 1991 equation was the most accurate for identifying presence or absence of obesity in this sample.
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    ABSTRACT: The objective of this study was to compare and correlate the Portable Ultra Sound (US) measuring technique to the skinfold measuring technique (SF) to estimate body fat percentage (%F) in young adults. Sixty military were evaluated, all males, divided in two groups: Group 1 (normal) composed by 30 military with Body Mass Index (BMI) until 24.99 kg/m(2) and Group 2 (overweight) composed by 30 military with BMI > 25 kg/m(2). Weight, height, skinfolds and ultrasound were measured in 9 points (triceps, subscapular, biceps, chest, medium axillary, abdominal, suprailiac, thigh and calf). Body fat average values obtained by skinfold thickness and ultrasound measurements were 13.25 ± 6.32 % and 12.73 ± 5.95 % respectively. Despite significant differences in measurements of each anatomical site, it was possible to verify that the total final body fat percentage calculated by both techniques did not present significant differences and that overweight group presented greater similarity between the values obtained using caliper and ultrasound equipment.
    Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 08/2012; 2012:1952-5. DOI:10.1109/EMBC.2012.6346337
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    ABSTRACT: The bioelectrical impedance analysis (BIA) tetra polar body is taken as whole equipment with better accuracy in the assessment of body composition, but its high cost restricts their use. Yet, the trustworthiness, reliability, and efficiency of these devices are still controversial. This study aimed at comparing different BIA devices for the assessment of body fat percentage (%TBF) of college students. The study included 60 subjects (33 men and 27 women), ages between 18 and 38 years old (23.2±4.7 years). Weight, height, and body mass index (BMI=kg/m²) were assessed. The %TBF was determined by Biodynamics™ (BIO) full-body tetrapolar bioimpedance device, OMRON™ HBF 306 bl (OMR) upperbody bioimpedance device and TANITA™ FS088R (TAN) lower-body bioimpedance device. It was used for statistical analysis the Kruskal-Wallis test to check the variance, analysis of agreement by intraclass correlation and the Bland-Altman. There was no difference between the %TBF values provided by BIO, OMR and TAN devices for men (16.4%, 14.5% and 17.3%; p=0.09) and women (25.7%, 23.5 and 25%; p=0.36). Furthermore, there was a significant correlation between TAN x BIO (0.76; p<0.0001), OMR x BIO (0.73; p <0.001) devices among men, and TAN x BIO (0.76; p<0.0001) and OMR x BIO (0.71; p<0.0001) devices among women. Close to zero average differences were observed in the Bland-Altman plot. There were no significant differences between BIA devices used to determine the %TBF of these individuals. OMRON™ and TANITA™ devices are suitable for use in daily practice.

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May 15, 2014