Document Detail


Carbohydrate drinks and cycling performance.
MedLine Citation:
PMID:  7967586     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We compared the effects of similarly tasting orange flavored drinks containing 0% (P), 6.4% (E1), and 10% (E2) carbohydrate (CHO) using 12 well-trained cyclists (VO2max = 5.0 l/min-1) on metabolic responses to exercise (EX) and a sprint type performance ride (PR). Each subject completed 3 separate 2 h EX bouts at 65% VO2max followed by a PR identified as the time in sec to complete 500 revolutions at a constant belt resistance of 29.4 N (ANOVA*). The CHO feedings or placebo of 3 ml/kg body weight were given double blind and counter-balanced at 0 min and every 20 min thereafter during EX. Blood samples were drawn and core temperature (Tr) was recorded at 0, 30, 60, 90, and 120 min of EX and 1 min post PR. Blood samples were analyzed for glucose (G) and lactate [LA-]. Blood G at 0 min were similar; however, at 120 min, G was 3.96 mM for P*, 4.57 mM for E1, and 4.77 mM for E2. Blood [LA-] remained similar throughout EX averaging (P, 2.6 mM; E1, 2.9 mM; E2, 2.5 mM). Tr at 120 min was also similar (P, 38.5 degrees C; E1, 38.6 degrees C; E2, 38.3 degrees C). Mean PR times for P(264.4 s)**, E1 (255.3 s)*, E2 (252.4 s)* indicate consumption of a CHO drink during EX improves PR. Furthermore, a 10% CHO drink improves PR more than a 6.4% CHO drink.
Authors:
D W Bacharach; S P von Duvillard; K W Rundell; J Meng; M R Cring; L Szmedra; J M Castle
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  34     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-12-23     Completed Date:  1994-12-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  161-8     Citation Subset:  IM    
Affiliation:
Human Performance Laboratory, Syracuse University, NY.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Beverages
Bicycling / physiology*
Blood Glucose / metabolism
Dietary Carbohydrates*
Double-Blind Method
Exercise / physiology*
Humans
Male
Oxygen Consumption / drug effects
Rehydration Solutions / pharmacology*
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/Dietary Carbohydrates; 0/Rehydration Solutions

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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