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Eur J Sport Sci. 2016 Nov;16(8):1073-8. doi: 10.1080/17461391.2016.1196735. Epub 2016 Jun 23.

Effects of various concentrations of carbohydrate mouth rinse on cycling performance in a fed state.

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a Department of Science , Centre for Exercise and Metabolic Science, Institute of Technology Tallaght , Dublin , Ireland.


The objective of this study was to identify the effects of mouth rinsing with a 6% and 16% carbohydrate solution (CHO) on time trial performance when compared to a 0% control (PLA) when in a fed state. Twelve recreationally active males underwent three trials by which they had to complete a set workload (600 ± 65 W) in a fed state. Throughout each trial, participants rinsed their mouths with a 25 ml bolus of a 0% PLA, 6% or 16% CHO (maltodextrin) for every 12.5% of work completed. Rating of perceived exertion (RPE) and heart rate were recorded every 12.5% of total work. Performance times and power output improved significantly when using the 6% and 16% CHO versus the PLA trial (6% versus PLA, p = .002 and 16% versus PLA, p = .001). When comparing the performance times of the 6% to 16% CHO, no significance was observed (p = .244). There was no significant difference between heart rate levels or RPE values across the three trials. In conclusion, mouth rinsing with a 6% or 16% CHO solution has a positive effect on a cycling time trial performance undertaken in a fed state.


16% CHO solution; 6% CHO solution; Maltodextrin; exercise; power output; time trial performance

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