| An isocaloric glucose-fructose beverage's effect on simulated 100-km cycling performance compared with a glucose-only beverage. | |
| | |
MedLine Citation:
|
PMID: 20479485 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
A number of recent research studies have demonstrated that providing glucose and fructose together in a beverage consumed during exercise results in significantly higher oxidation rates of exogenous carbohydrate (CHO) than consuming glucose alone. However, there is insufficient evidence to determine whether the increased exogenous CHO oxidation improves endurance performance. The purpose of this study was to determine whether consuming a beverage containing glucose and fructose (GF) would result in improved cycling performance compared with an isocaloric glucose-only beverage (G). Nine male competitive cyclists (32.6 +/- 5.8 years, peak oxygen uptake 61.5 +/- 7.9 ml x kg(-1) x min(-1)) completed a familiarization trial and then 2 simulated 100-km cycling time trials on an electronically braked Lode cycle ergometer separated by 5-7 d. During the randomly ordered experimental trials, participants received 36 g of CHO of either G or GF in 250 ml of water every 15 min. All 9 participants completed the 100-km time trial significantly faster when they received the GF beverage than with G (204.0 +/- 23.7 vs. 220.6 +/- 36.6 min; p = .023). There was no difference at any time point between trials for blood glucose or for blood lactate. Total CHO oxidation increased significantly from rest during exercise but was not statistically significant between the GF and G trials, although there was a trend for CHO oxidation to be higher with GF in the latter stages of the time trial. Consumption of a CHO beverage containing glucose and fructose results in improved 100-km cycling performance compared with an isocaloric glucose-only beverage. |
| | |
Authors:
|
Darren Triplett; J Andrew Doyle; Jeffrey C Rupp; Dan Benardot |
Related Documents
:
|
16306505 - Effects of dietary carbohydrate on delayed onset muscle soreness and reactive oxygen sp... 14684395 - Metabolic effects of caffeine in humans: lipid oxidation or futile cycling? 16953065 - The use of electrogastrography and external ultrasonography to evaluate gastric motilit... 8000815 - The influence of dietary carbohydrate and pre-exercise glucose consumption on supramaxi... 1018395 - Airway obstructed by foreign material: the heimlich maneuver. 3432375 - Disruption of muscle energy metabolism due to intense ischaemic exercise: a 31p nmr stu... |
Publication Detail:
|
Type: Journal Article; Randomized Controlled Trial |
Journal Detail:
|
Title: International journal of sport nutrition and exercise metabolism Volume: 20 ISSN: 1526-484X ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2010 Apr |
Date Detail:
|
Created Date: 2010-05-18 Completed Date: 2010-06-22 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: United States |
Other Details:
|
Languages: eng Pagination: 122-31 Citation Subset: IM |
Affiliation:
|
Dept. of Kinesiology and Health, Georgia State University, Atlanta, GA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Beverages Bicycling / physiology* Blood Glucose / metabolism Cross-Over Studies Exercise Test Fructose / administration & dosage, pharmacology* Glucose / administration & dosage, pharmacology* Humans Lactates / blood Male Oxidation-Reduction Oxygen Consumption / drug effects*, physiology Physical Endurance / drug effects*, physiology Young Adult |
| Chemical | |
Reg. No./Substance:
|
0/Blood Glucose; 0/Lactates; 30237-26-4/Fructose; 50-99-7/Glucose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Comparison of power outputs during time trialing and power outputs eliciting metabolic variables in ...
Next Document: Pseudoephedrine ingestion and cycling time-trial performance.