Date on Master's Thesis/Doctoral Dissertation

8-2008

Document Type

Master's Thesis

Degree Name

M.S.

Department

Health and Sport Sciences

Committee Chair

Jacks, Dean Edward

Subject

Glutamine--Physiological effect; Glutamine--Health aspects

Abstract

The purpose of this study was to determine the effects of acute glutamine supplementation on maximal performance and recovery from high-intensity exercise. In a placebo-controlled, crossover study, seven (six males and one female) healthy subjects performed maximal treadmill exercise one-hour after the ingestion of 0.03 g·kg body mass -1 glutamine mixed with caffeine-free fruit juice or placebo. Expired gases, respiratory exchange ratios (RER), heart rate (HR), ratings of perceived exertion (RPE) and blood samples were collected pre-, during, and post-exercise. In addition, urine and saliva samples were obtained pre- and post-exercise. No significant differences in oxygen consumption, CO 2 production, HR, RPE, urine and saliva pH were found between treatments. The GLN trial (1.20 ± 0.07) produced a higher RER value than the PLC trial (1.11 ± 0.09) at 5-min post-exercise, resulting in a significant difference (p = 0.042). However, the significant difference was due to the inclusion of the female in the group analysis. This study demonstrates that acute glutamine supplementation does not enhance maximal performance or recovery from high-intensity treadmill running.

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