Electronic Theses and Dissertations

Identifier

1139

Date

2014

Document Type

Thesis

Degree Name

Master of Science

Major

Health and Sport Science

Concentration

Exercise and Sport Science

Committee Chair

Richard Bloomer

Committee Member

Brian Schilling

Committee Member

Sang-Rok Lee

Abstract

The purpose of this proposed study was to determine the potential changes in testosterone (free and total) and estradiol over a four-week intervention period using D-aspartic acid (DAA) in men. Twenty-four physically active men, aged 18-39 years, were randomly assigned to two groups (conditions) using a placebo-controlled, double-blind design. Baseline values for all hormones were compared to values measured at the end of two and four weeks of DAA administration, provided at a dosage of 3.12g, compared to the placebo. Data were analyzed using a 2 (condition) x 3 (time) analysis of variance. No interaction or main effects were noted for any hormonal variable (p>0.05), with similar values noted between groups and across time. In conclusion, DAA supplementation for a 28 day period does not increase serum total or free testosterone in young, healthy men. Moreover, DAA has no impact on serum estradiol concentrations. Future studies may be designed to investigate the impact of DAA on testosterone and associated health parameters in a sample of older men and/or those with low testosterone concentrations.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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