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Sports Medicine
Published in: Sports Medicine 1/2019

01-01-2019 | Systematic Review

Effects of Carbohydrate Mouth Rinse on Cycling Time Trial Performance: A Systematic Review and Meta-Analysis

Authors: Cayque Brietzke, Paulo Estevão Franco-Alvarenga, Hélio José Coelho-Júnior, Rodrigo Silveira, Ricardo Yukio Asano, Flávio Oliveira Pires

Published in: Sports Medicine | Issue 1/2019

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Abstract

Background

Despite the growing number of studies reporting carbohydrate mouth rinse effects on endurance performance, no systematic and meta-analysis review has been conducted to elucidate the level of evidence of carbohydrate mouth rinse effects on cycling trial performance such as time-, work-, and distance-based trials.

Objectives

The objective of this study were to establish the effect of a carbohydrate mouth rinse on cycling performance outcomes such as mean power output and time to complete a trial, together with the risk of bias in the cycling-carbohydrate mouth rinse literature.

Methods

We systematically reviewed randomized placebo-controlled trials that assessed carbohydrate mouth rinse effects on mean power output and time to complete the trial. A random-effects meta-analysis assessed the standardized mean difference between carbohydrate and placebo mouth rinses.

Results

Thirteen studies (16 trials) were qualitatively (systematic review) and quantitatively (meta-analysis) analyzed with regard to mean power output (n = 175) and time to complete the trial (n = 151). Overall, the reviewed studies showed a low risk of bias and homogeneous results for mean power output (I2 = 0%) and time to complete the trial (I2 = 0%). When compared with placebo, the carbohydrate mouth rinse improved mean power output (standardized mean difference = 0.25; 95% confidence interval 0.04–0.46; p = 0.02), but not the time to complete the trial (standardized mean difference = − 0.13; 95% confidence interval − 0.36 to 0.10; p = 0.25).

Conclusion

The present systematic and meta-analytic review supports the notion that a carbohydrate mouth rinse has the potential to increase mean power output in cycling trials, despite showing no superiority over placebo in improving time to complete the trials.
Appendix
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Metadata
Title
Effects of Carbohydrate Mouth Rinse on Cycling Time Trial Performance: A Systematic Review and Meta-Analysis
Authors
Cayque Brietzke
Paulo Estevão Franco-Alvarenga
Hélio José Coelho-Júnior
Rodrigo Silveira
Ricardo Yukio Asano
Flávio Oliveira Pires
Publication date
01-01-2019
Publisher
Springer International Publishing
Published in
Sports Medicine / Issue 1/2019
Print ISSN: 0112-1642
Electronic ISSN: 1179-2035
DOI
https://doi.org/10.1007/s40279-018-1029-7

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