Abstract des Autors

The purpose of this study was to investigate in a cross-sectional design body composition, muscle fiber characteristics, cardiovascular risk factors and liver enzymes in bodybuilders who had used androgenic-anabolic steroids (AAS) intermittently (AAS group; n=14) and in non-users (CO group; n=12). Age, height, training characteristics and nutrition did not differ between both groups. Anthropometry included weight, 8 skinfolds and 11 circumferences. In a muscle biopsy from the vastus lateralis muscle water content, fiber type distribution and diameters of fiber type I and type II were determined. The autcome of this study suggests that after three months of AAS withdrawal bodybuilders who use AAS intermittently have greater BW, LBM, circumferences and muscle fiber type I than never-users, whereas no differences in fat mass, blood pressure, lipoprotein profiles and liver enzymes could be observed. Verf.-Referat