ICCBH2017 Poster Presentations (1) (209 abstracts)
Muscular fitness, bone mineral density and hip geometry in young males: the PRO-BONE study
Esther Ubago-Guisado 1 , Dimitris Vlachopoulos 2 , Augusto César de Moraes 3, , Ana Torres-Costoso 5 , Kelly Wilkinson 2 , Brad Metcalf 2, , Javier Sánchez-Sánchez 1, , Leonor Gallardo 1 & Luis Gracia-Marco 2,
1IGOID Research Group, University of Castilla-La Mancha, Toledo, Spain; 2Children’s Health and Exercise Research Centre, Sport and Health Sciences, University of Exeter, Exeter, UK; 3Department of Preventive Medicine, School of Medicine of the University of Sao Paulo, São Paulo, Brazil; 4Growth, Exercise, Nutrition and Development Research Group, University of Zaragoza, Zaragoza, Spain; 5School of Nursing and Physiotherapy, University of Castilla La Mancha, Toledo, Spain; 6University of Exeter Medical School, Exeter, UK; 7School of Sport Sciences, European University, Madrid, Spain.
Objective: The main aim was to evaluate associations between muscular fitness indices and bone outcomes, including hip geometry estimates in young males.
Methods: One hundred twenty one males (13.1±0.1 years) were included: 41 swimmers, 37 footballers, 29 cyclists and 14 non-athletes. Lean mass, areal bone mineral density (aBMD) and hip structural estimates were measured using dual-energy X-ray absorptiometry. Relationships of physical fitness tests (vertical jump and standing long jump) with bone outcomes were analysed using three regression models: Model 1, adjusted by age and stature; Model 2, model 1+vigorous physical activity (VPA); Model 3, model 2+lean mass. Bonferroni correction was applied and only values of P<0.006 were considered statistically significant.
Results: Performance in vertical jump (except for femoral neck aBMD and narrow neck width) and standing long jump (except for narrow neck width) was positively associated with all bone outcomes in models 1 and 2 (P<0.006). In model 3, most previous associations disappeared except those between standing long jump and total hip and trochanter aBMD (P=0.004 and 0.003, respectively), which were slightly attenuated.
Conclusion: VPA did not explain muscular fitness associations on bone outcomes and both muscular fitness and the skeletal benefits of sport participation appear to be a function of lean mass in young males.
Funding Sources: The research leading to these results has received funding from the European Union Seventh Framework Programme ([FP7/2007-2013] under grant agreement n°. PCIG13-GA-2013-618496.
Disclosure: The authors declared no competing interests.
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