Banca de QUALIFICAÇÃO: LEILANE LILIAN ARAUJO LEAL
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.DISCENTE : LEILANE LILIAN ARAUJO LEAL
DATA : 23/03/2018
HORA: 09:00
LOCAL: Sala de aula 07 do Departamento de Nutrição - DNUT/UFRN
TÍTULO:
Validity of bioelectrical impedance and anthropometry equations to determine the body composition of classical ballet dancers.
PALAVRAS-CHAVES:
Body composition; DXA; Bioelectrical impedance; Anthropometry; Dance.
PÁGINAS: 85
GRANDE ÁREA: Ciências da Saúde
ÁREA: Nutrição
RESUMO:
Body composition of an individual is directly related to performance and can be evaluated by different methods. Dual energy X-ray absorptiometry (DXA) is considered a reference method, and bioelectrical impedance (BIA) and anthropometry are more accessible methods, but depend on the use of prediction equations for estimating fat-free mass (FFM) or body fat mass (BF). Different equations for distinct populations are found in the literature, but no specific equation was found for Brazilian dancers, despite the recognized importance of body composition assessment in this population. The aim of present study was to validate BIA and anthropometry equations, comparing them with DXA, for classical ballet dancers. A cross-sectional study was conducted, with data collection between June 2016 and December 2017. Female adolescents and adults ballet dancers at intermediate/advanced level (n = 31) were assessed. Body composition evaluation included: total body using DXA, tetrapolar BIA and anthropometric assessments, including weight, height and eight skinfolds. We used the FFM and BF predictive equations found in the literature, where validation publications of predictive equations were searched, excluding equations involving different age groups of the present study and equations validated only for males. The correlation between the FFM or BF results given by equations and DXA was determined by the Spearman correlation (r2) or the Pearson correlation (r), according to the normality of the variables. The one sample T-test was used to verify if the mean differences between the results of the equations against DXA significantly differed from zero. The concordance between the different equations and DXA was determined through the Bland-Altman analysis, using simple linear regression to test the presence of proportional bias between the equations and DXA. The studied population had a median age of 20 (11) years and a mean of 28.23 (7.13)% BF by DXA. Only the BIA equation proposed by Deurenberg (1991) for FFM in adolescents aged 7 to 15 years showed good agreement with DXA (r = 0.960, p = 0.002 and one sample T-test p = 0,231), but overestimated the FFM on average 2.44 (1.79)%, presenting negative proportional bias (R2 = 0.915, beta = -0.965, p = 0.002). For BF by anthropometry, the equation proposed by Durnin & Womersley (1974) presented good agreement (r = 0.865, p = 0.000 and a one sample T-test p = 0.980), but this underestimated the BF on average -0.03 (1.09)%, also presenting negative proportional bias (R2 = 0.497, beta = -0.727, p = 0.001). The results showed that none of the predictive equations analyzed was effective in evaluating the body composition of the classical ballet dancers studied, and it is necessary to propose specific equations for this population.
MEMBROS DA BANCA:
Interno - 1879430 - ANA PAULA TRUSSARDI FAYH
Presidente - 2646462 - BRUNA LEAL LIMA MACIEL
Externo ao Programa - 2315640 - MARCIA MARILIA GOMES DANTAS LOPES