Region-specific differences in the response of geometric parameters of cortical fibula structure to the force of peroneal muscles in football players

SERGIO LUSCHER; LAURA NOCCIOLINO; NICOLÁS PILOT; LEANDRO PISANI; GUSTAVO ROBERTO COINTRY; JOERN RITTWEGER; ALEX IRELAND; JOSÉ LUIS FERRETTI; RICARDO FRANCISCO CAPOZZA

Montreal

Congreso; ASBMR 2018 Annual Meeting; 2018

American Society for Bone & Mineral Research

Structural differences have been described along the cortical human fibula, suggesting distinct, site-specific adaptations to its mechanical environment. The fibula shaft appears insensitive to disuse, whilst the fibula?s response to exercise has been little studied. In this study, the cross-sectional moments of inertia concerning lateral and A-P bending (yMI, xMI) and torsion (pMI) and the cross-sectional area and vBMD of cortical bone (CtA, CtD) were pQCT-assessed in 18 serial scans of the fibula taken at every 5% of the 10-90% segment of tibia length, and the maximal strengths of the one-leg jump and the external rotation of the foot were dynamometrically assessed in the dominant (kicking) leg of 19 healthy male footballers (FB) who were trained for 4-8 years and of 15 untrained controls, aged 18-30 years. All MI?s were adjusted to CtA to assess the efficiency of distribution of the available cortical tissue to resist each type of deformation.All MI?s were consistently larger in FB than in controls throughout the bone (ppMI>xMI. All CtA-adjusted MI?s correlated with the strength of the external rotation of the foot (not the one-leg jump) in all subjects, with highest values of both variables for FB, most significantly for the yMI (p