The present study described the daily moods of male bodybuilders who self-administered large doses of anabolic-androgenic steroids (AS) through a full cycle of steroid use. Male bodybuilders (N = 13) who had been self-administering AS for 2.5 to 12 years served as subjects and participated in a 14 to 16 week experience sampling procedure wherein brief mood questionnaires were filled out twice daily. / Findings revealed that 11 of the 13 subjects experienced self-reported mood changes in association with AS use. In particular, 2 subjects (subjects 4 & 11) experienced quite dramatic changes in mood. It is concluded that there is much variability with regards to the psychological effects that humans may display in association with AS use. / Data are discussed in terms of the effects that AS use may have on mental health.

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The purpose of this research is to explain anabolic steroid use among non-competitive male bodybuilders. Two theories of deviant behavior are used in this research: rational choice theory and social learning theory. This thesis tests these theories on a sample of 50 males from fitness centers and gymnasiums. The results are interpreted in light of their implications for future research on the factors that encourage steroid use and other deviant behavior. / Master of Science