Revista Brasileira de Educação Física e Esporte
Print version ISSN 1807-5509
MOREIRA, Pedro Vieira Sarmet et al. Analysis of predictive equations of body fat in young taekwondo athletes. Rev. bras. educ. fís. esporte [online]. 2012, vol.26, n.3, pp. 391-399. ISSN 1807-5509. http://dx.doi.org/10.1590/S1807-55092012000300005.
Due to the lack of valid and accessible tests to measure the body fat percentage (BF%) of adolescent taekwondo athletes (TKDA), this study aimed to analyze six anthropometric equations in the prediction of BF% with the Dual-Energy-x-Ray (DEXA) as referential method for five TKDA (12.23 years ± 1.60). The BF% estimated by the equations were compared with DEXA values using the t-student , linear regression and Bland & Altman (B&A) tests. Only the equation of Slaughter et al. (1988) was adequated by the sample size calculation, and although it subestimated the BF% (in 4.85% ± 0.98), it showed a high correlation (R = 0.935; R2 = 0.874 EPE = 1.01) and low amplitude in the limits of agreement at 95% (3.84%) by B&A in comparison to DEXA. However, this equation is adequated to predict the BF% in TKDA, if it's corrected by the adjustement equation [%G (DEXA) = 1,64 + 1,24•%G (Eq 4)] generated by linear regression.
Keywords : Densitometry; Body composition; Skinfold-thickness.