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Title: | Agreement Between Standard Body Composition Methods to Estimate Percentage of Body Fat in Young Male Athletes |
Authors: | FERRI-MORALES, Asuncion; NASCIMENTO-FERREIRA, Marcus Vinicius; VLACHOPOULOS, Dimitris; UBAGO-GUISADO, Esther; TORRES-COSTOSO, Ana; MORAES, Augusto Cesar F. De; BARKER, Alan R.; MORENO, Luis A.; MARTINEZ-VIZCAINO, Vicente; GRACIA-MARCO, Luis |
Citation: | PEDIATRIC EXERCISE SCIENCE, v.30, n.3, p.402-410, 2018 |
Abstract: | Purpose: To examine the intermethods agreement of dual-energy X-ray absorptiometry (DXA) and foot-to-foot bioelectrical impedance analysis (BIA) to assess the percentage of body fat (%BF) in young male athletes using air-displacement plethysmography (ADP) as the reference method. Methods: Standard measurement protocols were carried out in 104 athletes (40 swimmers, 37 footballers, and 27 cyclists, aged 12-14 y). Results: Age-adjusted %BF ADP and %BF BIA were significantly higher in swimmers than footballers. ADP correlates better with DXA than with BIA (r = .84 vs r = .60, P < .001). %BF was lower when measured by DXA and BIA than ADP (P < .001), and the bias was higher when comparing ADP versus BIA than ADP versus DXA. The intraclass correlation coefficients between DXA and ADP showed a good to excellent agreement (r = .67-.79), though it was poor when BIA was compared with ADP (r = .26-.49). The ranges of agreement were wider when comparing BIA with ADP than DXA with ADP. Conclusion: DXA and BIA seem to underestimate %BF in young male athletes compared with ADP. Furthermore, the bias significantly increases with %BF in the BIA measurements. At the individual level, BIA and DXA do not seem to predict % BF precisely compared with ADP in young athletic populations. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - FM/Outros Artigos e Materiais de Revistas Científicas - LIM/38 Artigos e Materiais de Revistas Científicas - LIM/39 |
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