Document Detail


Effect of exercise on insulin action in human skeletal muscle.
MedLine Citation:
PMID:  2496078     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of 1 h of dynamic one-legged exercise on insulin action in human muscle was studied in 6 healthy young men. Four hours after one-legged knee extensions, a three-step sequential euglycemic hyperinsulinemic clamp combined with arterial and bilateral femoral vein catheterization was performed. Increased insulin action on glucose uptake was found in the exercised compared with the rested thigh at mean plasma insulin concentrations of 23, 40, and 410 microU/ml. Furthermore, prior contractions directed glucose uptake toward glycogen synthesis and increased insulin effects on thigh O2 consumption and at some insulin concentrations on potassium exchange. In contrast, no change in insulin effects on limb exchange of free fatty acids, glycerol, alanine or tyrosine were found after exercise. Glycogen concentration in rested vastus lateralis muscle did not increase measurably during the clamp even though indirect estimates indicated net glycogen synthesis. In contrast, in exercised muscle estimated and biopsy-verified increases in muscle glycogen concentration agreed. Local contraction-induced increases in insulin sensitivity and responsiveness play an important role in postexercise recovery of human skeletal muscle.
Authors:
E A Richter; K J Mikines; H Galbo; B Kiens
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  66     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1989 Feb 
Date Detail:
Created Date:  1989-06-02     Completed Date:  1989-06-02     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  876-85     Citation Subset:  IM; S    
Affiliation:
Department of Medical Physiology B, Panum Institute, University of Copenhagen, Denmark.
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MeSH Terms
Descriptor/Qualifier:
Adult
Alanine / metabolism
Fatty Acids, Nonesterified / metabolism
Glucose / metabolism,  pharmacokinetics
Glycogen / metabolism
Glycogen Synthase / metabolism
Humans
Insulin / pharmacology*
Lactates / secretion
Lactic Acid
Male
Muscle Contraction
Muscles / drug effects*,  physiology
Oxygen Consumption / drug effects
Physical Exertion*
Chemical
Reg. No./Substance:
0/Fatty Acids, Nonesterified; 0/Insulin; 0/Lactates; 50-21-5/Lactic Acid; 50-99-7/Glucose; 56-41-7/Alanine; 9005-79-2/Glycogen; EC 2.4.1.11/Glycogen Synthase

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