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dc.contributor.authorAnawalt, Bradley D.en_US
dc.contributor.authorTenover, J. Lisaen_US
dc.contributor.authorBowman, F. DuBoisen_US
dc.contributor.authorBremner, William J.en_US
dc.contributor.authorMatsumoto, Alvin M.en_US
dc.contributor.authorPage, Stephanie T.en_US
dc.contributor.authorAmory, John K.en_US
dc.date.accessioned2008-10-17T20:40:15Z
dc.date.available2008-10-17T20:40:15Z
dc.date.issued2005-03en_US
dc.identifier.citationJ Clin Endocrinol Metab. 2005 Mar;90(3):1502-10. Epub 2004 Nov 30en_US
dc.identifier.urihttp://hdl.handle.net/1773/4294
dc.description.abstractTestosterone (T) therapy in older men with low serum T levels increases lean body mass and decreases fat mass. These changes might improve physical performance and strength; however, it has not been established whether T therapy improves functional outcome in older men. Moreover, concerns exist about the impact of T therapy on the prostate in older men. The administration of finasteride (F), which partially blocks the conversion of T to the more potent androgen, dihydrotestosterone, attenuates the impact of T replacement on prostate size and prostate-specific antigen. We hypothesized that T replacement in older, hypogonadal men would improve physical function and that the addition of F to this regimen would continue to provide the T-induced improvements in physical performance, strength, and body composition. Seventy men with low serum T (<350 ng/dl), age 65 yr and older, were randomly assigned to receive one of three regimens for 36 months: 1) T enanthate, 200 mg im every 2 wk, with placebo pills daily (T-only); 2) T enanthate, 200 mg every 2 wk, with 5 mg F daily (T + F); or 3) placebo injections and pills (placebo). We obtained serial measurements of timed physical performance, grip strength, lower extremity strength, body composition (by dual-energy x-ray absorptiometry), fasting cholesterol profiles, and hormones. Fifty men completed the 36-month protocol. After 36 months, T therapy significantly improved performance in a timed functional test when compared with baseline and placebo [4.3 +/- 1.6% (mean +/- sem, T-only) and 3.8 +/- 1.0% (T + F) vs. -5.6 +/- 1.9% for placebo (P < 0.002 for both T and T + F vs. placebo)] and increased handgrip strength compared with baseline and placebo (P < 0.05). T therapy increased lean body mass [3.77 +/- 0.55 kg (T-only) and 3.64 +/- 0.56 kg (T + F) vs. -0.21 +/- 0.55 kg for placebo (P < 0.0001)], decreased fat mass, and significantly decreased total cholesterol, low-density lipoprotein, and leptin, without affecting high-density lipoprotein, adiponectin, or fasting insulin levels. These results demonstrate that T therapy in older men with low serum T improves physical performance and strength over 36 months, when administered alone or when combined with F, and suggest that high serum levels of dihydrotestosterone are not essential for these beneficial effects of T in men.en_US
dc.language.isoen_USen_US
dc.publisherEndocrine Societyen_US
dc.subjectandrologyen_US
dc.subjectmale contraceptionen_US
dc.subjectklinefelter's syndromeen_US
dc.subject5-alpha reductase inhibitorsen_US
dc.subjectspermatogenesisen_US
dc.subjectcolchicineen_US
dc.subjectreifenstein's syndromeen_US
dc.subjectgonadotropinsen_US
dc.subjecttestosteroneen_US
dc.subject.meshMaleen_US
dc.subject.meshAgeden_US
dc.subject.meshInsulin, blooden_US
dc.subject.meshIntercellular Signaling Peptides and Proteins, blooden_US
dc.subject.meshAdiponectinen_US
dc.subject.meshAgingen_US
dc.subject.meshBody Compositionen_US
dc.subject.meshAged, 80 and overen_US
dc.subject.meshLipids, blooden_US
dc.subject.meshResearch Support, U.S. Gov't, P.H.S.en_US
dc.subject.meshEnzyme Inhibitors, administration & dosageen_US
dc.subject.meshBody Mass Indexen_US
dc.subject.meshDouble-Blind Methoden_US
dc.subject.meshHand Strengthen_US
dc.subject.meshAndrogens, administration & dosage, deficiencyen_US
dc.subject.meshTestosterone, administration & dosage, deficiencyen_US
dc.subject.meshDrug Therapy, Combinationen_US
dc.subject.meshMotor Activity, drug effectsen_US
dc.subject.meshLeptin, blooden_US
dc.subject.meshHypogonadism, drug therapy, physiopathologyen_US
dc.subject.meshHumansen_US
dc.subject.meshFinasteride, administration & dosageen_US
dc.titleExogenous testosterone (T) alone or with finasteride increases physical performance, grip strength, and lean body mass in older men with low serum Ten_US
dc.typeArticleen_US


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