Degree Name

MA (Master of Arts)

Program

Kinesiology and Sport Studies

Date of Award

12-2003

Committee Chair or Co-Chairs

Diego de Hoyos

Committee Members

Diana Mozen, Kevin Breuel

Abstract

Recent evidence suggests that declining bone mineral density (BMD) in males is related to declining circulating estrogens. The majority of endogenous plasma estrogens in males result from peripheral aromatization of plasma androgens. Thus, it was hypothesized that dietary supplementation with an aromatizable androgen (androstenedione) may stimulate increases in BMD.

BMD (measured by dual energy x-ray absorptiometry) and biochemical markers of bone turnover (1, 25 OH2 Vitamin D, calcitonin, deoxypyrodinoline, and parathyroid hormone) were assessed before and after 12 weeks of dietary androstenedione supplementation (200 mg/d). Twenty-four volunteers were randomized into either an androstenedione supplementation or placebo groups. Study volunteers also performed high intensity resistance training (RT) during the treatment period.

Androstenedione supplementation significantly increased plasma estradiol-17β levels by 82%. However, the increase in estradiol-17β did not impact bone turnover. The RT regimen did stimulate significant, local increases in BMD. Spine BMD was significantly increased by 6% for both treatment groups.

Document Type

Thesis - Open Access

Copyright

Copyright by the authors.

Included in

Kinesiology Commons

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