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Title: | Lean mass explains the association between muscular fitness and bone outcomes in 13-year-old boys |
Authors: | UBAGO-GUISADO, Esther; VLACHOPOULOS, Dimitris; MORAES, Augusto Cesar Ferreira de; TORRES-COSTOSO, Ana; WILKINSON, Kelly; METCALF, Brad; SANCHEZ-SANCHEZ, Javier; GALLARDO, Leonor; GRACIA-MARCO, Luis |
Citation: | ACTA PAEDIATRICA, v.106, n.10, p.1658-1665, 2017 |
Abstract: | Aim: This study investigated the associations between fitness indices and bone outcomes in young males. Methods: Data were collected between autumn and winter 2014-2015 on 121 males with a mean age of 13.1 +/- 0.1 years: 41 swimmers, 37 footballers, 29 cyclists and 14 nonathletes. Participants were recruited from athletic clubs and schools across South West England. Lean mass, areal bone mineral density and hip structural estimates were measured using dual-energy X-ray absorptiometry. The relationships between bone outcomes and the vertical jump, standing long jump and the 20-m shuttle run test were analysed using three regression models: model 1 was adjusted by age and stature, model 2 added vigorous physical activity and model 3 then added lean mass. Results: The boys' performance in the vertical jump and standing long jump was positively associated with the majority of bone outcomes in models 1 and 2, but most of these disappeared in model 3. The 20-m shuttle run test was positively associated with most bone outcomes in all three models. Lean mass played a key role in the association between muscular fitness and bone outcomes. Conclusion: Vigorous physical activity did not explain the associations between fitness and bone outcomes, but lean mass did. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - FM/Outros Artigos e Materiais de Revistas Científicas - LIM/38 |
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