Document Detail

Effect of postexercise carbohydrate supplementation on muscle glycogen repletion in trained sled dogs.
MedLine Citation:
PMID:  9361887     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To evaluate the effect of immediate postexercise carbohydrate supplementation on muscle glycogen (MG) repletion during the first 4 hours of recovery in sled dogs. ANIMALS: 24 Alaskan Huskies. PROCEDURE: Dogs were assigned to 1 of 3 treatment groups, and a muscle biopsy specimen was obtained 1 hour before and immediately (group A) or 4 hours (groups B and C) after a 30-km run. Immediately after exercise, dogs in group A and group C were given water; dogs in group B were given a glucose polymer solution (1.5 g/kg of body weight) in water. RESULTS: At 4 hours after exercise, MG concentration was significantly greater in group-B than in group-C dogs; the value in group-C dogs was not different from the value in group-A dogs immediately after exercise. Assuming similar rates of glycogen depletion between treatment groups, during the first 4 hours of recovery, group-B dogs replaced 49% of the glycogen used during exercise. Plasma glucose concentration was significantly greater in group-B than in group-A and group-C dogs at 100 minutes after exercise. CONCLUSIONS: Immediate postexercise carbohydrate supplementation in sled dogs leads to increased glucose concentration, which in turn promotes more rapid rate of MG repletion in the first 4 hours of recovery than is observed in dogs not given supplements. CLINICAL RELEVANCE: For dogs running in multiple heats on a single day or over several consecutive days, immediate postexercise carbohydrate supplementation may promote more rapid and complete recovery between bouts of exercise.
A J Reynolds; D P Carey; G A Reinhart; R A Swenson; F A Kallfelz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of veterinary research     Volume:  58     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-01-27     Completed Date:  1998-01-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1252-6     Citation Subset:  IM; S    
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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MeSH Terms
Biopsy / methods,  veterinary
Blood Glucose / analysis
Dietary Carbohydrates / administration & dosage,  pharmacology*
Dietary Supplements
Dogs / metabolism*,  physiology
Glucose / metabolism
Glycogen / analysis,  metabolism*
Histocytochemistry / methods
Muscle Fibers, Skeletal / ultrastructure
Muscle, Skeletal / chemistry,  metabolism*,  physiology
Physical Conditioning, Animal / physiology*
Random Allocation
Time Factors
Reg. No./Substance:
0/Blood Glucose; 0/Dietary Carbohydrates; 50-99-7/Glucose; 9005-79-2/Glycogen

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

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