Journal ArticleDOI
The effect of carbohydrate mouth rinse on 1-h cycle time trial performance
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TLDR
The results demonstrate that carbohydrate mouth rinse has a positive effect on 1-h time trial performance, and the mechanism responsible for the improvement in high-intensity exercise performance with exogenous carbohydrate appears to involve an increase in central drive or motivation rather than having any metabolic cause.Abstract:
PURPOSE AND METHOD: To investigate the possible role of carbohydrate (CHO) receptors in the mouth in influencing exercise performance, seven male and two female endurance cyclists (VO(2max) 63.2 +/- 2.7 (mean +/- SE) mL.kg*(-1).min(-1)) completed two performance trials in which they had to accomplish a set amount of work as quickly as possible (914 +/- 40 kJ). On one occasion a 6.4% maltodextrin solution (CHO) was rinsed around the mouth for every 12.5% of the trial completed. On the other occasion, water (PLA) was rinsed. Subjects were not allowed to swallow either the CHO solution or water, and each mouthful was spat out after a 5-s rinse. RESULTS: Performance time was significantly improved with CHO compared with PLA (59.57 +/- 1.50 min vs 61.37 +/- 1.56 min, respectively, P = 0.011). This improvement resulted in a significantly higher average power output during the CHO compared with the PLA trial (259 +/- 16 W and 252 +/- 16 W, respectively, P = 0.003). There were no differences in heart rate or rating of perceived exertion (RPE) between the two trials (P > 0.05). CONCLUSION: The results demonstrate that carbohydrate mouth rinse has a positive effect on 1-h time trial performance. The mechanism responsible for the improvement in high-intensity exercise performance with exogenous carbohydrate appears to involve an increase in central drive or motivation rather than having any metabolic cause. The nature and role of putative CHO receptors in the mouth warrants further investigation.read more
Citations
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Journal ArticleDOI
Carbohydrates for training and competition.
TL;DR: Whether implementing additional “train-low” strategies to increase the training adaptation leads to enhanced performance in well-trained individuals is unclear.
Journal ArticleDOI
Carbohydrate sensing in the human mouth: effects on exercise performance and brain activity
TL;DR: The results suggest that the improvement in exercise performance that is observed when carbohydrate is present in the mouth may be due to the activation of brain regions believed to be involved in reward and motor control.
Journal ArticleDOI
Carbohydrate intake during exercise and performance
TL;DR: The search will continue for ways to further improve CHO delivery and to improve the oxidation efficiency resulting in less accumulation of CHO in the gastrointestinal tract and potentially decreasing gastrointestinal problems during prolonged exercise.
Journal ArticleDOI
ISSN exercise & sports nutrition review update: research & recommendations
Chad M. Kerksick,Colin D. Wilborn,Michael D. Roberts,Abbie E. Smith-Ryan,Susan M. Kleiner,Ralf Jäger,Richard L. Collins,Matthew B. Cooke,Jaci N. Davis,Elfego Galvan,Mike Greenwood,Lonnie Lowery,Robert Wildman,Jose Antonio,Richard B. Kreider +14 more
TL;DR: This updated review is to provide ISSN members and individuals interested in sports nutrition with information that can be implemented in educational, research or practical settings and serve as a foundational basis for determining the efficacy and safety of many common sport nutrition products and their ingredients.
Journal ArticleDOI
Does the Brain Consume Additional Glucose during Self-Control Tasks?
TL;DR: From the standpoint of evolved function, glucose might better be thought of as an input to decision making systems rather than as a constraint on performance.
References
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