Objective: There is conflicting evidence on whether beta-alanine supplementation can improve exercise performance. The purpose of this study was to determine whether 4 weeks of beta-alanine supplementation would improve anaerobic exercise performance compared to placebo, measured by peak power output, anaerobic fatigue index, total work done, and subjective feelings of fatigue.
Methods: This was a double-blind, placebo-controlled experimental study involving 23 adult males. Subjects were recruited via flyers placed at Bastyr University and neighboring health foods stores and gyms. The inclusion criteria were that potential subjects had to be adult men (18+ years). Exclusion criteria included answering yes to at least one question on the screening questionnaire (PAR-Q), being female, and any persons currently taking performance enhancing dietary supplements. Subjects were assigned into one of three groups: the experimental group of 3.2 g/day or 6.4 g//day of β-alanine supplementation, or a placebo group. Before starting supplementation, exercise performance measurements were taken using the Wingate anaerobic test on a bicycle ergometer. Subjects then took the treatment for 28 days and then retested. An analysis of variance was performed to determine any variances in performance between the three groups.
Results: There were no significant differences between groups for peak power output, anaerobic fatigue index, and subjective feelings of fatigue.
Conclusions: Based on the nonsignificant differences between groups, it is inconclusive whether supplemental BA has any effect on anaerobic exercise performance. Future research should take into account skeletal muscle fiber composition of the study subjects prior to enrollment, use a longer version of the Wingate, and keep the training protocols throughout the study session consistent among subjects. Further research is still needed to determine beta-alanine’s efficacy for its performance enhancing effects.
|Commitee:||Bartok, Cynthia, Kirk, Elizabeth|
|School Location:||United States -- Washington|
|Source:||MAI 55/05M(E), Masters Abstracts International|
|Keywords:||Anaerobic, Beta-alanine, Exercise, Supplement|
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