A sucrose mouth rinse does not improve 1-Hr cycle time trial performance when performed in the fasted or fed state

Journal article


Trommelen, Jorn, Beelen, Milou, Mullers, Marjan, Gibala, Martin J., Van Loon, Luc J.C. and Cermak, Naomi M.. (2015) A sucrose mouth rinse does not improve 1-Hr cycle time trial performance when performed in the fasted or fed state. International Journal of Sport Nutrition and Exercise Metabolism. 25(6), pp. 576 - 583. https://doi.org/10.1123/ijsnem.2015-0094
AuthorsTrommelen, Jorn, Beelen, Milou, Mullers, Marjan, Gibala, Martin J., Van Loon, Luc J.C. and Cermak, Naomi M.
Abstract

Carbohydrate mouth rinsing during exercise has been suggested to enhance performance of short (45–60 min) bouts of high-intensity ( > 75% VO2peak) exercise. Recent studies indicate that this performance enhancing effect may be dependent on the prandial state of the athlete. The purpose of this study was to define the impact of a carbohydrate mouth rinse on ~1-hr time trial performance in both the fasted and fed states. Using a double-blind, crossover design, 14 trained male cyclists (27 ± 6 years; 5.0 ± 0.5 W·kg-1) were selected to perform 4 time trials of ~1 hr (1,032 ± 127 kJ) on a cycle ergometer while rinsing their mouths with a 6.4% sucrose solution (SUC) or a noncaloric sweetened placebo (PLA) for 5 s at the start and at every 12.5% of their set amount of work completed. Two trials were performed in an overnight fasted state and two trials were performed 2 h after consuming a standardized breakfast. Performance time did not differ between any of the trials (fasted-PLA: 68.6 ± 7.2; fasted-SUC: 69.6 ± 7.5; fed-PLA: 67.6 ± 6.6; and fed-SUC: 69.0 ± 6.3 min; Prandial State × Mouth Rinse Solution p = .839; main effect prandial state p = .095; main effect mouth rinse solution p = .277). In line, mean power output and heart rate during exercise did not differ between trials. In conclusion, a sucrose mouth rinse does not improve ~1-hr time trial performance in well-trained cyclists when performed in either the fasted or the fed state.

Keywordscarbohydrate; postabsorptive; cycling
Year2015
JournalInternational Journal of Sport Nutrition and Exercise Metabolism
Journal citation25 (6), pp. 576 - 583
PublisherHuman Kinetics, Inc.
ISSN1526-484X
Digital Object Identifier (DOI)https://doi.org/10.1123/ijsnem.2015-0094
Scopus EID2-s2.0-84959335801
Page range576 - 583
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States
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