Beta-alanine did not improve high-intensity performance throughout simulated road cycling

Perim, P., Gobbi, N., Duarte, B., Farias de Oliveira, L., Costa, L.A.R., Sale, C. ORCID: 0000-0002-5816-4169, Gualano, B., Dolan, E. and Saunders, B., 2021. Beta-alanine did not improve high-intensity performance throughout simulated road cycling. European Journal of Sport Science. ISSN 1746-1391

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Abstract

This study investigated the effect of beta-alanine supplementation on short-duration sprints and final 4-km simulated uphill cycling time-trial performance during a comprehensive and novel exercise protocol representative of the demands of road-race cycling, and determined if changes were related to increases in muscle carnosine content. Seventeen cyclists (age 38 ± 9 y, height 1.76 ± 0.07 m, body mass 71.4 ± 8.8 kg, V̇O2max 52.4 ± 8.3 ml·kg-1·min-1) participated in this placebo-controlled, double-blind study. Cyclists undertook a prolonged intermittent cycling protocol lasting 125 minutes, with a 10-s sprint every 20 minutes, finishing with a 4-km time-trial at 5% simulated incline. Participants completed two familiarization sessions, and two main sessions, one pre-supplementation and one post-supplementation following 28 days of 6.4 g·day-1 of beta-alanine (N=11) or placebo (N=6; maltodextrin). Muscle biopsies obtained pre- and post-supplementation were analysed for muscle carnosine content. There were no main effects on sprint performance throughout the intermittent cycling test (all P>0.05). There was no group (P=0.69), time (P=0.50) or group x time interaction (P=0.26) on time-to-complete the 4-km time-trial. Time-to-completion did not change from pre- to post-supplementation for BA (-19.2 ± 45.6 s, P=0.43) or PL (+2.8 ± 31.6 s, P=0.99). Beta-alanine did not influence blood lactate values or ratings of perceived exertion during the prolonged cycling test. Beta-alanine supplementation increased muscle carnosine content from pre- to post-supplementation (+9.4 ± 4.0 mmol·kg-1dm; P

Item Type: Journal article
Publication Title: European Journal of Sport Science
Creators: Perim, P., Gobbi, N., Duarte, B., Farias de Oliveira, L., Costa, L.A.R., Sale, C., Gualano, B., Dolan, E. and Saunders, B.
Publisher: Taylor & Francis
Date: 7 June 2021
ISSN: 1746-1391
Identifiers:
NumberType
10.1080/17461391.2021.1940304DOI
1444559Other
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 10 Jun 2021 14:18
Last Modified: 10 Jun 2021 14:18
URI: http://irep.ntu.ac.uk/id/eprint/43039

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