β-alanine supplementation improves YoYo intermittent recovery test performance
Open accessAbstract
BACKGROUND: β-alanine supplementation has been shown to improve high-intensity exercise performance and capacity. However, the effects on intermittent exercise are less clear, with no effect shown on repeated sprint activity. The aim of this study was to investigate the effects of β-alanine supplementation on YoYo Intermittent Recovery Test Level 2 (YoYo IR2) performance. METHODS: Seventeen amateur footballers were allocated to either a placebo (PLA; N = 8) or β-alanine (BA; N = 9) supplementation group, and performed the YoYo IR2 on two separate occasions, pre and post 12 weeks of supplementation during a competitive season. Specifically, players were supplemented from early to mid-season (PLA: N = 5; BA: N = 6) or mid- to the end of the season (PLA: N = 3; BA: N = 3). Data were analysed using a two factor ANOVA with Tukey post-hoc analyses. RESULTS: Pre supplementation scores were 1185 ± 216 and 1093 ± 148 m for PLA and BA, with no differences between groups (P = 0.41). YoYo performance was significantly improved for BA (+34.3%, P ≤ 0.001) but not PLA (-7.3%, P = 0.24) following supplementation. 2 of 8 (Early - Mid: 2 of 5; Mid - End: 0 of 3) players improved their YoYo scores in PLA (Range: -37.5 to + 14.7%) and 8 of 9 (Early - Mid: 6 of 6; Mid - End: 2 of 3) improved for BA (Range: +0.0 to +72.7%). CONCLUSIONS: 12 weeks of β-alanine supplementation improved YoYo IR2 performance, likely due to an increased muscle buffering capacity resulting in an attenuation of the reduction in intracellular pH during high-intensity intermittent exercise.
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A study supplemented 16 men with 3 doses of sodium bicarbonate (0.1, 0.2, and 0.3 g/kg BW) and found increased blood NaHCO3 concentrations per dose (+2.0-5, +5.1-8.1, and +6.0-2.3 mmol/L) and dose over time (30-150, 40-165, and 75-180 min).
“A study supplemented 16 men with 3 doses of sodium bicarbonate, 0.1 g kg -1 BW, 0.2 g kg -1 BW, and 0.3 g kg -1 BW, and found, respectively, increased blood NaHCO3 concentrations per dose (+2.0-5, +5.1-8.1, and +6.0-2.3 mmol L -1 ) and dose over time (30-150, 40-165, and 75-180 min) [25].”
From Dietary and Ergogenic Supplementation to Improve Elite Soccer Players’ Performance (2021) · cites this paper as [25]
The Methods (Subjects; Study design) describe 17 male footballers assigned to β-alanine or placebo, not 16 men given three sodium bicarbonate doses. The Discussion explicitly says blood measures were not taken, so this study could not report the claimed blood bicarbonate concentrations or timing. (LLM, conf=0.91)
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- Authors
- Saunders, B., Sunderland, C., Harris, R. C., & Sale, C.
- Affiliations
- Nottingham Trent University (GB)
- Junipa Ltd Newmarket Suffolk UK
- Corresponding author
- Sunderland, Caroline
- Venue
- Journal of the International Society of Sports Nutrition
- Publisher
- Informa UK Limited
- Published
- 2012-02-06
- Volume
- 9
- Issue
- 1
- Pages
- 39-39
- ISSN
- 1550-2783 (ISSN-L)
- PMC
- PMC3470991
- OpenAlex
- W2146654845
- Cited by
- 54
- References
- 21
- Citations by year
- 2025: 4 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 7 · 2017: 6 · 2016: 5 · 2015: 5 · 2014: 5 · 2013: 7 · 2012: 1
- FWCI
- 3.86
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Journal of the International Society of Sports Nutrition (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Nottingham Trent University's Institutional Repository (Nottingham Trent Repository) (submittedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Biochemical effects in animals
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
- Keywords
- beta-alanine supplementation, intermittent exercise, high-intensity exercise, football players, muscle buffering capacity, intracellular pH, exercise performance, timing of supplementation
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