Effects on the cortical fibula structure of a long-term training in running after a previous training in soccer.

PILOT, NICOLÁS; LUSCHER, SERGIO; MACKLER, LEANDRO; IRELAND, ALEX; FERRETTI, JOSE LUIS; COINTRY, GUSTAVO ROBERTO; CAPOZZA, RICARDO FRANCISCO

San Diego, California

Congreso; ASBMR 2021 Annual Meeting; 2021

American Society for Bone and Mineral Research

We had shown that the lateral bending strength of the proximal fibula is lower in young males trained in long-distance running than in untrained individuals. The cross-sectional nature of the study precluded determination of whether this difference resulted from a reduction in, or impaired development of the lateral-medial bone diameter. To solve this question, we compared the fibulae of individuals trained in running only or after being trained in soccer (which enhances medial-lateral fibula diameter).Four groups of males aged 18-30 each, who had been trained for >4 years in long-distance running only (R, n=15), soccer only (S, 30), or running after soccer (S+R, 15), or were untrained but otherwise active individuals (controls, C, 15) were studied. pQCT indicators of fibula cortical mass were assessed: area, BMC (CtA, CtC); cross-sectional design: periosteal and endocortical perimeters (PoPm, EcPm), thickness (CtTh); A-P and lateral bending strength (cross-sectional moments of inertia, xMI, yMI, shape index, SI=yMI/xMI), and indices of the efficiency of cortical tissue distribution (MIs/CtA ratios), in 18 serial scans of the whole dominant fibulae. The maximal force of foot rotation-eversion (Fmax) was also measured.Throughout the bones, CtA, CtC, PoPm, EoPm, CtTh, xMI/CtA and yMI/CtA were higher for S than for C (factorial ANOVA, p