Document Detail

Metabolic effects of glucose, medium chain triglyceride and long chain triglyceride feeding before prolonged exercise in rats.
MedLine Citation:
PMID:  3277846     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to test the hypothesis that oral ingestion of lipids could increase endurance by slowing the rate of glycogen depletion. Trained rats were killed after a 2 h run on a rodent treadmill, following an intragastric infusion of water, glucose, medium chain triglycerides (MCT) or long chain triglycerides (LCT). Glucose and triglycerides were administered in equicaloric concentrations (50 kJ). The results show that oral ingestion of lipids (MCT or LCT) did not reduce glycogen depletion in liver, heart or skeletal muscle after exercise whereas the fat diet increased muscle and heart glycogen stores in resting conditions. In contrast, glucose feeding induced a significant sparing effect on endogenous carbohydrate utilization and reduced physical exercise lipolysis. These data indicated, firstly, that enhanced lipid availability induced by a single lipid meal before exercise was not able to modify the glycogen depletion occurring after exercise and, secondly, that the glucose/fatty acid cycle was not effective in these conditions. The comparison between lipids indicated that the effect on glycogen use of MCT did not differ from that of LCT, and did not seem to be of any particular importance during physical exercise.
E Auclair; P Satabin; E Servan; C Y Guezennec
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  57     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1988  
Date Detail:
Created Date:  1988-03-31     Completed Date:  1988-03-31     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  126-31     Citation Subset:  IM    
Centre d'Etudes et de Recherches de Médecine Aérospatiale, Laboratoire de Physiologie Hormonale et Métabolique, Paris, France.
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MeSH Terms
3-Hydroxybutyric Acid
Acetoacetates / blood
Blood Glucose
Dietary Fats / administration & dosage*
Glucose / administration & dosage*
Glycogen / metabolism
Hydroxybutyrates / blood
Insulin / blood
Liver / metabolism
Muscles / metabolism
Myocardium / metabolism
Rats, Inbred Strains
Triglycerides / administration & dosage*
Reg. No./Substance:
0/Acetoacetates; 0/Blood Glucose; 0/Dietary Fats; 0/Hydroxybutyrates; 0/Triglycerides; 11061-68-0/Insulin; 300-85-6/3-Hydroxybutyric Acid; 50-99-7/Glucose; 541-50-4/acetoacetic acid; 9005-79-2/Glycogen

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

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