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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.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.