Additive effects of beta-alanine and sodium bicarbonate on high-intensity upper-body intermittent performance

Tobias, G, Benatti, FB, de Salles Painelli, V, Roschel, H, Gualano, B, Sale, C ORCID: https://orcid.org/0000-0002-5816-4169, Harris, RC, Lancha Jr., AH and Artioli, GG ORCID: https://orcid.org/0000-0001-8463-2213, 2013. Additive effects of beta-alanine and sodium bicarbonate on high-intensity upper-body intermittent performance. Amino Acids, 45 (2), pp. 309-317. ISSN 0939-4451

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Abstract

We examined the isolated and combined effects of beta-alanine (BA) and sodium bicarbonate (SB) on high-intensity intermittent upper-body performance in judo and jiu-jitsu competitors. 37 athletes were assigned to one of four groups: (1) placebo (PL)+PL; (2) BA+PL; (3) PL+SB or (4) BA+SB. BA or dextrose (placebo) = (6.4 g day-1) was ingested for 4 weeks and 500 mg kg-1 BM of SB or calcium carbonate (placebo) was ingested for 7 days during the 4th week. Before and after 4 weeks of supplementation, the athletes completed four 30-s upper-body Wingate tests, separated by 3 min. Blood lactate was determined at rest, immediately after and 5 min after the 4th exercise bout, with perceived exertion reported immediately after the 4th bout. BA and SB alone increased the total work done in +7 and 8 %, respectively. The co-ingestion resulted in an additive effect (+14 %, p < 0.05 vs. BA and SB alone). BA alone significantly improved mean power in the 2nd and 3rd bouts and tended to improve the 4th bout. SB alone significantly improved mean power in the 4th bout and tended to improve in the 2nd and 3rd bouts. BA+SB enhanced mean power in all four bouts. PL+PL did not elicit any alteration on mean and peak power. Post-exercise blood lactate increased with all treatments except with PL+PL. Only BA+ SB resulted in lower ratings of perceived exertion (p = 0.05). Chronic BA and SB supplementation alone equally enhanced high-intensity intermittent upper-body performance in well-trained athletes. Combined BA and SB promoted a clear additive ergogenic effect.

Item Type:	Journal article
Publication Title:	Amino Acids
Creators:	Tobias, G., Benatti, F.B., de Salles Painelli, V., Roschel, H., Gualano, B., Sale, C., Harris, R.C., Lancha Jr., A.H. and Artioli, G.G.
Publisher:	Springer
Date:	2013
Volume:	45
Number:	2
ISSN:	0939-4451
Identifiers:	Number Type 10.1007/s00726-013-1495-z DOI
Rights:	© 2013 Springer
Divisions:	Schools > School of Science and Technology
Record created by:	EPrints Services
Date Added:	09 Oct 2015 09:46
Last Modified:	22 Sep 2017 12:43
URI:	https://irep.ntu.ac.uk/id/eprint/2477

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