Date of Final Oral Examination (Defense)
Type of Culminating Activity
Master of Science in Kinesiology, Biophysical Studies
Scott A. Conger, Ph.D.
Shawn R. Simonson, Ed.D.
Matthew Darnell, Ph.D.
Mouth rinsing with a carbohydrate (CHO) solution during exercise has been shown to improve endurance exercise performance. However, it is unclear if performance is improved to a greater extent with a higher concentration mouth rinse. PURPOSE: The purpose of this study was to determine if there was a dose-response effect to CHO mouth rinse concentration on endurance performance during a 1h cycling time trial. METHODS: Fourteen male participants, aged 18-45 years old, who cycled a minimum of 30 miles per week, participated in this study. Participants completed five, 1h time trials on a cycle ergometer, each separated by at least five days. During the first trial, participants completed a familiarization trial during which they rinsed with 25ml of water every 15 minutes of the time trial. In a double-blind fashion, participants then completed trials during which a 0%, 3%, 6%, or 12% CHO solution was rinsed in 15-minute intervals during the four experimental trials. Average power, work completed, heart rate (HR), rating of perceived exertion (RPE), and cadence were recorded during each trial. RESULTS: The results indicated that there were no significant differences in work performed (p = 0.405), average power (p = 0.082), HR (p = 0.399), or RPE (p = 0.764) across any of the experimental trials. CONCLUSION: This study found no improvement in cycling time trial performance when using a CHO mouth rinse and no dose-response to CHO mouth rinse concentration. Further research is warranted to investigate the possibility of a dose-response in a fasted state.
Youell, Jonathan, "The Effects of Carbohydrate Mouth Rinse Concentration on Cycling Time Trial Performance" (2016). Boise State University Theses and Dissertations. 1160.