Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Date of Graduation

Summer 2019

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Department of Kinesiology

Advisor(s)

Michael J. Saunders

Nicholas D. Luden

Christopher J. Womack

Abstract

PURPOSE: This study examined the effects of a novel maltodextrin-fructose hydrogel (MF-H) on cycling performance and gastrointestinal distress symptoms. METHODS: Nine endurance-trained male cyclists completed three experimental trials consisting of a 98-min varied-intensity cycling protocol followed by a performance test of ten consecutive sprint intervals. In a cross-over design, subjects consumed 250 mL of a treatment beverage every 15 min of cycling. The treatments consisted of 78 g . hr-1 of either a) MF-H, b) maltodextrin-fructose (MF), and c) maltodextrin only (MD) All data were assessed using repeated measures ANOVA’s. RESULTS: There were no differences in average sprint power between treatments (MF-H, 284 ± 51 W; MF, 281 ± 46 W; and MD, 277 ± 48 W), or power output for any individual sprint. However, mean power output for sprints 7-10 was significantly lower in MD (259 ± 2 W) versus MF (269 ± 2 W; p=0.04) and versus MF-H (270 ± 2 W; p=0.01). Subjective ratings of gastrointestinal discomfort symptoms (nausea, fullness, and abdominal cramping) increased significantly over time during the cycling trials, but few individuals exceeded moderate levels in any trial with no systematic differences in gastrointestinal discomfort symptoms observed between treatments. CONCLUSIONS: Ingestion of a maltodextrin/fructose hydrogel beverage improved cycling performance late in exercise compared to maltodextrin alone, but provided no further performance benefits versus a maltodextrin/fructose beverage. In addition, the maltodextrin/fructose hydrogel beverage resulted no systematic benefits in gastrointestinal comfort versus the other beverages.

Available for download on Tuesday, June 08, 2021

Share

COinS