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Effects of β-alanine supplementation on exercise performance: a meta-analysis
R M Hobson1, B Saunders, G Ball
1Biomedical, Life and Health Sciences Research Centre, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK.
Beta-alanine supplementation enhances exercise capacity and performance, particularly for durations between 60 and 240 seconds. This meta-analysis confirms its ergogenic benefits for athletes.
Area of Science:
- Exercise Physiology
- Nutritional Science
- Sports Medicine
Background:
- Beta-alanine is a precursor to carnosine, a key buffer of hydrogen ions during high-intensity exercise.
- Its role in buffering H+ makes it a popular ergogenic aid for improving athletic performance.
- Previous qualitative reviews exist, necessitating a quantitative analysis of the literature.
Purpose of the Study:
- To conduct a preliminary quantitative review of beta-alanine supplementation's effects on sports performance.
- To perform a meta-analysis to consolidate existing research findings.
- To evaluate the ergogenic potential of beta-alanine.
Main Methods:
- A comprehensive literature search identified relevant studies.
- Strict exclusion criteria were applied to ensure data quality.
- Fifteen manuscripts involving 360 participants, 174 in beta-alanine groups and 186 in placebo groups, were analyzed.
Main Results:
- Beta-alanine supplementation significantly improved exercise measures compared to placebo (P=0.002).
- Exercise capacity was enhanced with beta-alanine (P=0.013), but exercise performance showed no significant improvement (P=0.204).
- Significant benefits were observed for exercise durations of 60-240 s (P=0.001) and >240 s (P=0.046), but not for <60 s (P=0.312).
Conclusions:
- Beta-alanine supplementation demonstrates ergogenic benefits, particularly for sustained high-intensity exercise.
- The findings support the role of beta-alanine in enhancing muscle buffering capacity.
- Further research may refine optimal supplementation protocols and target populations.
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