Document Detail

The effects of ingesting polylactate or glucose polymer drinks during prolonged exercise.
MedLine Citation:
PMID:  1844999     Owner:  NLM     Status:  MEDLINE    
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.
T D Fahey; J D Larsen; G A Brooks; W Colvin; S Henderson; D Lary
Related Documents :
16331129 - Creatine supplementation reduces muscle inosine monophosphate during endurance exercise...
1886479 - Responses to varying rates of carbohydrate ingestion during exercise.
11101469 - Effects of acute (-)-hydroxycitrate supplementation on substrate metabolism at rest and...
20169359 - Effects of carbohydrate supplementation on competitive runners undergoing overload trai...
15165999 - Combined ingestion of protein and carbohydrate improves protein balance during ultra-en...
20479489 - Glycemic index and endurance performance.
20551099 - Cardiopulmonary exercise testing with right-heart catheterization in patients with syst...
3081339 - Blood flow, po2, pco2 and ph during progressive working contractions in a whole muscle ...
3246259 - St segment changes in healthy volunteers during holter monitoring and exercise stress t...
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    
Department of Physical Education, California State University, Chico 95926.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Beverages* / analysis
Bicarbonates / blood
Bicycling / physiology
Blood Glucose / metabolism*
Double-Blind Method
Exercise / physiology*
Glucose / administration & dosage*
Hydrogen-Ion Concentration
Lactates / administration & dosage*,  blood,  metabolism
Lactic Acid
Physical Endurance / physiology*
Polymers / administration & dosage*,  metabolism
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

Previous Document:  The nutritional habits of young adolescent swimmers.
Next Document:  Nutritional concerns of female athletes: a case study.