ICCBH2017 Poster Presentations (1) (209 abstracts)
Determinants of bone outcomes in adolescent athletes at baseline: The PRO-BONE study
Luis Gracia-Marco 1, , Dimitris Vlachopoulos 1 , Esther Ubago-Guisado 2 , Alan R Barker 1 , Ioannis G Fatouros 3 , Alexandra Avlotini 4 , Karen K Knapp 1 , Luis A Moreno 5 & Craig A Williams 1
1University of Exeter, Exeter, UK; 2University of Castilla-La Mancha, Toledo, Spain; 3University of Thessaly, Trikala, Greece; 4University of Thrace, Komotini, Greece; 5University of Zaragoza, Zaragoza, Spain.
Objectives: The determinants of areal bone mineral density (aBMD) and hip geometry estimates in adolescent athletes are poorly understood. This study aimed to identify the determinants of aBMD and hip geometry estimates in adolescent male athletes.
Methods: One hundred twenty one males (13.1±0.1 years) were measured: 41 swimmers, 37 footballers, 29 cyclists and 14 controls. Dual energy X-ray absorptiometry (DXA) measured aBMD at lumbar spine, femoral neck (FN) and total body. Hip structural analysis evaluated hip geometry estimates at the FN. Multiple linear regression examined the contribution of the sports practised, stature, lean and fat mass, serum calcium and vitamin D, moderate to vigorous physical activity (MVPA), vertical jump and cardiorespiratory fitness (CRF) with aBMD and hip geometry estimates.
Results: Region specific lean mass was the strongest positive predictor of aBMD (β=0.614–0.931) and football participation was the next strongest predictor (β=0.304–0.579). Stature (β=0.235–0.380), fat mass (β=0.189), serum calcium (β=0.103), serum vitamin D (β=0.104–0.139) and vertical jump (β=0.146–0.203) were associated with aBMD across various specific sites. All hip geometry estimates were associated with lean mass (β=0.370–0.568) and stature (β=0.338–0.430). Football participation was associated with hip cross-sectional area (β=0.322) and MVPA (β=0.140–0.142). CRF (β=0.183–0.207) was associated with section modulus and cross-sectional moment of inertia.
Conclusion: Region specific lean mass is the strongest determinant of aBMD and hip geometry estimates in adolescent male athletes. Football participation and stature were important determinants for aBMD and hip geometry estimates while the contribution of the other predictors was site specific.
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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