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The Navy SEAL Physical Fitness Guide - Uniformed Services ...

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use of AAS for improved competitiveness violates ethical principles and is strictlyprohibited by the military services as well as the United States Olympic Committee(USOC) and other national sports governing bodies.How do Anabolic Steroids Work?AAS are synthetic derivatives of the hormone testosterone, which is responsible forthe development of male characteristics. <strong>The</strong> pituitary gland in the brain controls theproduction of testosterone in the male testes. Testosterone has both androgenic(masculinizing effects) and anabolic (tissue-building) properties. <strong>The</strong> main functions oftestosterone in an adult are to:" Promote secondary male sex characteristics, such as hair patterns and deepeningof voice." Increase muscle mass." Initiate and maintain sperm production.Anabolic steroids were developed by structurally altering testosterone to reduce itsbreakdown, and to maximize its tissue-building (anabolic) effects. <strong>The</strong> more commonlyused anabolic steroids are listed in Table 13-1. This class of steroids was first usedtherapeutically to treat certain disorders of the blood, bone mass deterioration, proteinwasting states, and as a replacement therapy for male children deficient in testosterone.AAS should not be confused withcorticosteroids which act asanti-inflammatory agents and are usedto treat a variety of medical conditions.222 Harmful Substances that Affect Performance

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