The ergogenic effect of beta-alanine combined with sodium bicarbonate on high-intensity swimming performance

DE SALLES PAINELLI, V., ROSCHEL, H., DE JESUS, F., SALE, C., HARRIS, R.C., SOLIS, M.Y., BENATTI, F.B., GUALANO, G., LANCHA JR., A.H. and ARTIOLI, G.G., 2013. The ergogenic effect of beta-alanine combined with sodium bicarbonate on high-intensity swimming performance. Applied Physiology, Nutrition, and Metabolism, 38 (5), pp. 525-532. ISSN 1715-5312

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Abstract

We investigated the effect of beta-alanine (BA) alone (study A) and in combination with sodium bicarbonate (SB) (study B) on 100- and 200-m swimming performance. In study A, 16 swimmers were assigned to receive either BA (3.2 g·day−1 for 1 week and 6.4 g·day−1 for 4 weeks) or placebo (PL; dextrose). At baseline and after 5 weeks of supplementation, 100- and 200-m races were completed. In study B, 14 were assigned to receive either BA (3.2 g·day−1 for 1 week and 6.4 g·day−1 for 3 weeks) or PL. Time trials were performed once before and twice after supplementation (with PL and SB), in a crossover fashion, providing 4 conditions: PL-PL, PL-SB, BA-PL, and BA-SB. In study A, BA supplementation improved 100- and 200-m time-trial performance by 2.1% (p = 0.029) and 2.0% (p = 0.0008), respectively. In study B, 200-m time-trial performance improved in all conditions, compared with presupplementation, except the PL-PL condition (PL-SB, +2.3%; BA-PL, +1.5%; BA-SB, +2.13% (p < 0.05)). BA-SB was not different from BA-PL (p = 0.21), but the probability of a positive effect was 78.5%. In the 100-m time-trial, only a within-group effect for SB was observed in the PL-SB (p = 0.022) and BA-SB (p = 0.051) conditions. However, 6 of 7 athletes swam faster after BA supplementation. The probability of BA having a positive effect was 65.2%; when SB was added to BA, the probability was 71.8%. BA and SB supplementation improved 100- and 200-m swimming performance. The coingestion of BA and SB induced a further nonsignificant improvement in performance.

Item Type: Journal article
Publication Title: Applied Physiology, Nutrition, and Metabolism
Creators: De Salles Painelli, V., Roschel, H., De Jesus, F., Sale, C., Harris, R.C., Solis, M.Y., Benatti, F.B., Gualano, G., Lancha Jr., A.H. and Artioli, G.G.
Publisher: NRC Research Press, a division of Canadian Science Publishing
Date: 2013
Volume: 38
Number: 5
ISSN: 1715-5312
Identifiers:
NumberType
10.1139/apnm-2012-0286DOI
Rights: © Copyright 2013 – Canadian Science Publishing
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:03
Last Modified: 23 Aug 2016 09:07
URI: http://irep.ntu.ac.uk/id/eprint/6990

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