β-alanine supplementation improves YoYo intermittent recovery test performance
<p>Abstract</p> <p>Background</p> <p>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 stu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2012-08-01
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| Series: | Journal of the International Society of Sports Nutrition |
| Subjects: | |
| Online Access: | http://www.jissn.com/content/9/1/39 |
| _version_ | 1818120321511718912 |
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| author | Saunders Bryan Sunderland Caroline Harris Roger C Sale Craig |
| author_facet | Saunders Bryan Sunderland Caroline Harris Roger C Sale Craig |
| author_sort | Saunders Bryan |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>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.</p> <p>Methods</p> <p>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.</p> <p>Results</p> <p>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%).</p> <p>Conclusions</p> <p>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.</p> |
| first_indexed | 2024-12-11T05:24:14Z |
| format | Article |
| id | doaj.art-84691c8626d641b7b6f8e92544292bb3 |
| institution | Directory Open Access Journal |
| issn | 1550-2783 |
| language | English |
| last_indexed | 2024-12-11T05:24:14Z |
| publishDate | 2012-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of the International Society of Sports Nutrition |
| spelling | doaj.art-84691c8626d641b7b6f8e92544292bb32022-12-22T01:19:37ZengTaylor & Francis GroupJournal of the International Society of Sports Nutrition1550-27832012-08-01913910.1186/1550-2783-9-39β-alanine supplementation improves YoYo intermittent recovery test performanceSaunders BryanSunderland CarolineHarris Roger CSale Craig<p>Abstract</p> <p>Background</p> <p>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.</p> <p>Methods</p> <p>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.</p> <p>Results</p> <p>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%).</p> <p>Conclusions</p> <p>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.</p>http://www.jissn.com/content/9/1/39β-alanineCarnosineYoYo Intermittent recovery testRepeated sprint activityTeam sport specific exercise capacity |
| spellingShingle | Saunders Bryan Sunderland Caroline Harris Roger C Sale Craig β-alanine supplementation improves YoYo intermittent recovery test performance Journal of the International Society of Sports Nutrition β-alanine Carnosine YoYo Intermittent recovery test Repeated sprint activity Team sport specific exercise capacity |
| title | β-alanine supplementation improves YoYo intermittent recovery test performance |
| title_full | β-alanine supplementation improves YoYo intermittent recovery test performance |
| title_fullStr | β-alanine supplementation improves YoYo intermittent recovery test performance |
| title_full_unstemmed | β-alanine supplementation improves YoYo intermittent recovery test performance |
| title_short | β-alanine supplementation improves YoYo intermittent recovery test performance |
| title_sort | β alanine supplementation improves yoyo intermittent recovery test performance |
| topic | β-alanine Carnosine YoYo Intermittent recovery test Repeated sprint activity Team sport specific exercise capacity |
| url | http://www.jissn.com/content/9/1/39 |
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