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Review

Effects of Beta-Alanine Supplementation on Physical Performance in Aerobic–Anaerobic Transition Zones: A Systematic Review and Meta-Analysis

1
Grupo de Investigación en Salud, Actividad Física y Deporte ISAFYD, Escuela de Educación Física, Universidad de Las Américas, sede Viña del Mar 2531098, Chile
2
Facultad de Ciencias, Escuela de Nutrición y Dietética, Magíster en Nutrición para la Actividad Física y Deporte, Universidad Mayor, Santiago 8580745, Chile
3
Facultad de Ciencias, Escuela de Nutrición y Dietética, Universidad Mayor, Santiago 8580745, Chile
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(9), 2490; https://doi.org/10.3390/nu12092490
Received: 13 July 2020 / Revised: 11 August 2020 / Accepted: 13 August 2020 / Published: 19 August 2020
(This article belongs to the Special Issue Nutrition and Athletic Performance)
Beta-alanine supplementation (BA) has a positive impact on physical performance. However, evidence showing a benefit of this amino acid in aerobic–anaerobic transition zones is scarce and the results controversial. The aim of this systematic review and meta-analysis is to analyze the effects of BA supplementation on physical performance in aerobic–anaerobic transition zones. At the same time, the effect of different dosages and durations of BA supplementation were identified. The search was designed in accordance with the PRISMA® guidelines for systematic reviews and meta-analyses and performed in Web of Science (WOS), Scopus, SPORTDiscus, PubMed, and MEDLINE between 2010 and 2020. The methodological quality and risk of bias were evaluated with the Cochrane Collaboration tool. The main variables were the Time Trial Test (TTT) and Time to Exhaustion (TTE) tests, the latter separated into the Limited Time Test (LTT) and Limited Distance Test (LDT). The analysis was carried out with a pooled standardized mean difference (SMD) through Hedges’ g test (95% CI). Nineteen studies were included in the systematic review and meta-analysis, revealing a small effect for time in the TTT (SMD, −0.36; 95% CI, −0.87–0.16; I2 = 59%; p = 0.010), a small effect for LTT (SMD, 0.25; 95% CI, −0.01–0.51; I2 = 0%; p = 0.53), and a large effect for LDT (SMD, 4.27; 95% CI, −0.25–8.79; I2 = 94%; p = 0.00001). BA supplementation showed small effects on physical performance in aerobic–anaerobic transition zones. Evidence on acute supplementation is scarce (one study); therefore, exploration of acute supplementation with different dosages and formats on physical performance in aerobic–anaerobic transition zones is needed. View Full-Text
Keywords: beta-alanine; ergogenic aid; physical performance; aerobic–anaerobic transition zone beta-alanine; ergogenic aid; physical performance; aerobic–anaerobic transition zone
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MDPI and ACS Style

Huerta Ojeda, Á.; Tapia Cerda, C.; Poblete Salvatierra, M.F.; Barahona-Fuentes, G.; Jorquera Aguilera, C. Effects of Beta-Alanine Supplementation on Physical Performance in Aerobic–Anaerobic Transition Zones: A Systematic Review and Meta-Analysis. Nutrients 2020, 12, 2490. https://doi.org/10.3390/nu12092490

AMA Style

Huerta Ojeda Á, Tapia Cerda C, Poblete Salvatierra MF, Barahona-Fuentes G, Jorquera Aguilera C. Effects of Beta-Alanine Supplementation on Physical Performance in Aerobic–Anaerobic Transition Zones: A Systematic Review and Meta-Analysis. Nutrients. 2020; 12(9):2490. https://doi.org/10.3390/nu12092490

Chicago/Turabian Style

Huerta Ojeda, Álvaro, Camila Tapia Cerda, María F. Poblete Salvatierra, Guillermo Barahona-Fuentes, and Carlos Jorquera Aguilera. 2020. "Effects of Beta-Alanine Supplementation on Physical Performance in Aerobic–Anaerobic Transition Zones: A Systematic Review and Meta-Analysis" Nutrients 12, no. 9: 2490. https://doi.org/10.3390/nu12092490

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