Influence of carbohydrate mouth rinsing on repeated interval swimming performance in well-trained adolescent swimmers

Bailey, Evan and Clarke, Neil and Cole, Matthew and Gough, Lewis A. and Newbury, Josh and Roberts, Charlie (2025) Influence of carbohydrate mouth rinsing on repeated interval swimming performance in well-trained adolescent swimmers. Performance Nutrition, 1. ISSN 3059-2933

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Abstract

Background: Carbohydrate mouth rinsing (CHO-MR) may provide an ergogenic effect for exercise performance, with small beneficial effects demonstrated in cycling and running exercise ≤ 1 hour. There is little evidence supporting the use of CHO-MR during high-intensity intermittent activity such as some swimming disciplines. As such, the aim of this study was to explore the impact of CHO-MR on sprint time, perceptions of effort and arousal, and gastrointestinal comfort in well-trained adolescent swimmers. Eleven participants completed three trials (CHO-MR, placebo and control) in a randomised, double-blinded fashion. Participants were fasted and completed four 50m sprints separated by 30-seconds rest, with rinsing occurring prior to each sprint. Results: There were no significant differences between conditions for fastest (CHO: 29.7 ± 3.3 s; PLA: 30.0 ± 3.2 s; CON: 29.3 ± 3.2 s), mean (CHO: 31.4 ± 3.0 s; PLA: 31.4 ± 2.8 s; CON: 30.8 ± 2.6 s), total sprint time (CHO: 125.5 ± 12.2 s; PLA: 125.5 ± 11.4 s; CON: 123.3 ± 10.5 s) or percentage decrement score (CHO: 5.8 ± 4.2%; PLA: 4.9 ± 4.2%; CON: 5.7 ± 4.7%). Furthermore, no significant differences between conditions were observed for rate of perceived exertion, arousal, or gastrointestinal comfort. Conclusion: The results of this study do not support the use of CHO-MR as an ergogenic aid for repeated interval swimming. Future research could explore the impact of CHO-MR on longer duration swimming given the potential ergogenic effect in other disciplines.

Item Type:	Article
Identification Number:	10.1186/s44410-025-00002-w
Dates:	Date Event 5 March 2025 Accepted 10 April 2025 Published Online
Uncontrolled Keywords:	CHO, Ergogenic aid, Exercise
Subjects:	CAH03 - biological and sport sciences > CAH03-02 - sport and exercise sciences > CAH03-02-01 - sport and exercise sciences
Divisions:	Faculty of Health, Education and Life Sciences > College of Life Sciences
Depositing User:	Gemma Tonks
Date Deposited:	11 Mar 2025 16:04
Last Modified:	28 Apr 2025 13:38
URI:	https://www.open-access.bcu.ac.uk/id/eprint/16230

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