Document Detail


The effects of ingesting polylactate or glucose polymer drinks during prolonged exercise.
MedLine Citation:
PMID:  1844999     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Five trained, fasted male cyclists rode a cycle ergometer three times at 50% of VO2max for 180 min. Using a balanced order, double-blind procedure, subjects were given either a solution containing polylactate (PL: 80% polylactate, 20% sodium lactate, in 7% solution with water), glucose polymer (GP: multidextrin in 7% solution with water), or control (C: water sweetened with aspartame) 5 min before exercise and at 20-min intervals during exercise. Venous blood samples were taken at rest and at 20-min intervals during exercise. In general, PL and GP rendered similar results except that pH and bicarbonate (HCO3-) were higher in PL. There were no differences between treatments in perceived exertion, sodium, potassium, chloride, lactate, heart rate, oxygen consumption, rectal temperature, or selected skin temperatures. These data show that polylactate may help maintain blood glucose and enhance blood buffering capacity during prolonged exercise and could be a useful component in an athletic fluid replacement beverage.
Authors:
T D Fahey; J D Larsen; G A Brooks; W Colvin; S Henderson; D Lary
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  International journal of sport nutrition     Volume:  1     ISSN:  1050-1606     ISO Abbreviation:  Int J Sport Nutr     Publication Date:  1991 Sep 
Date Detail:
Created Date:  1993-06-17     Completed Date:  1993-06-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9307702     Medline TA:  Int J Sport Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  249-56     Citation Subset:  IM    
Affiliation:
Department of Physical Education, California State University, Chico 95926.
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MeSH Terms
Descriptor/Qualifier:
Adult
Beverages* / analysis
Bicarbonates / blood
Bicycling / physiology
Blood Glucose / metabolism*
Double-Blind Method
Exercise / physiology*
Glucose / administration & dosage*
Humans
Hydrogen-Ion Concentration
Lactates / administration & dosage*,  blood,  metabolism
Lactic Acid
Male
Physical Endurance / physiology*
Polymers / administration & dosage*,  metabolism
Chemical
Reg. No./Substance:
0/Bicarbonates; 0/Blood Glucose; 0/Lactates; 0/Polymers; 26100-51-6/poly(lactic acid); 50-21-5/Lactic Acid; 50-99-7/Glucose

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


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