Evaluation of the accuracy of different body composition prediction formulas compared to DXA in Colombian Women's Professional Soccer

Abstract

The objective was to evaluate the different formulas for predicting body composition with DEXA, in Colombian Women's Professional Soccer during a competitive period, to know which competent ones are closer to the reference method and can be used to evaluate fat percentage in the absence of more precise methods.

It is a cross-sectional analytical study with a non-probabilistic demonstration for convenience in 24 soccer players from two first division teams using 26 anthropometric variables. A descriptive analysis was carried out in SPSS v.21; and a correlation analysis (SP), Lin's concordance indices, and the Bland and Altman method.

To find the percentage of fat in 2 components, Yuhasz (15.17(13.98-16.72)%), Durnin and Rahaman (25.57(24.95-28.07)%), Jackson and Pollock ( 16.71(14.33-19.33)%) and Durnin and Womersley (24.90(24.02-27.01)%), for 5 components the lipid mass was calculated by weight (19.80(17, 80-22.30)%) and in DEXA the data of the percentage of fat (23.94 ± 3.51%). The smallest inter-method difference with DEXA was obtained by Durnin and Womersley with a value of -0.70, so the fat percentages found would overestimate DEXA by an average of 0.7 points.

The fat percentages calculated using the Durnin and Womersley formula were the most similar to the fat percentage values ​​obtained by the DEXA reference method.