Skip Navigation LinksHome > July/August 2013 - Volume 12 - Issue 4 > Oral Carbohydrate Rinse: Placebo or Beneficial?
Current Sports Medicine Reports:
doi: 10.1249/JSR.0b013e31829a6caa
Nutrition & Ergogenic Aids: Section Articles

Oral Carbohydrate Rinse: Placebo or Beneficial?

Jeukendrup, Asker E. MSc, PhD, FACSM

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Abstract

Carbohydrates during exercise can improve exercise performance even when the exercise intensity is high (>75% V˙O2max) and the duration relatively short (approximately 1 h), but the underlying mechanisms for the ergogenic effects are different from those during more prolonged exercise. Studies have even shown effects of oral carbohydrate mouth rinses compared to placebo with improvements typically between 2% and 3% during exercise lasting approximately 1 h. The effects appear more profound after an overnight fast, but effects are still present even after ingestion of a meal. Brain imaging studies have identified brain areas involved, and it is likely that the oral carbohydrate mouth rinse results in afferent signals capable of modifying motor output. These effects appear to be specific to carbohydrate and are independent of taste. Further research is warranted to fully understand the separate taste transduction pathways for various carbohydrates as well as the practical implications.

Copyright © 2013 by the American College of Sports Medicine

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