The use of anabolic-androgenic steroids (AS) by athletes to enhance their athletic performance has been reported since the 1950s Androgen use has spread to different groups of athletes, who use these drugs for various reasons. The common thread among all these groups, however,is the goal of enhancing muscular capacities and athletic performance and being successful (winning). Androgen use by weightlifters in order to enhance strength and thereby perform better in an event in which there is a direct correlation between strength and success is well known.
To strengthen the anabolic properties of testosterone, more than 100 synthetic steroid derivatives have been described for human purposes. The anabolic effect promotes protein synthesis, muscle growth and erythropoiesis. In clinical practice, substances with anabolic effect are needed to overcome various catabolic states. However, none of these compounds are devoid of androgenicity. Androgenic and anabolic properties of anabolic steroids cannot be totally separated. Therefore, it is more appropriate to use the term anabolic androgenic steroids (AAS).