Document Detail


Splanchnic glucose and muscle glycogen metabolism after glucose feeding during postexercise recovery.
MedLine Citation:
PMID:  696819     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Glucose (100 g) was ingested 15 min after bicycle exercise until exhaustion at a work load corresponding to 70% of maximal uptake (series 1), 14--15 h after an identical exercise period, no food being taken in the interval (series 2), and by nonexercised control subjects. Splanchnic glucose output in the exercised groups rose to values 50--300% greater than in controls, amounting to (over 135 min) 59 +/- 5 g in series 1 and 58 +/- 6 in series 2 compared to 28 +/- 6 in controls. The glycogen concentration of quadriceps muscle in series 1 was 65 +/- 2 mmol glycosyl U/kg wet wt before exercise, 16 +/- 13 at the end of work, and 32 +/- 4 at 135 min after glucose ingestion. In series 2, muscle glycogen concentration was 20 +/- 3 immediately after exercise and rose to 44 +/- 5 over the ensuing 14--15 h in spite of continued fasting. It rose to 56 +/- 3 at 135 min after glucose loading. Repletion of leg muscle glycogen after glucose feeding could account for 50--66% of total splanchnic glucose release. It is concluded that during postexercise recovery, a greater proportion of an oral glucose load escapes hepatic retention, allowing repletion of muscle glycogen to take precedence over hepatic glycogen repletion.
Authors:
S Maehlum; P Felig; J Wahren
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  235     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1978 Sep 
Date Detail:
Created Date:  1978-11-29     Completed Date:  1978-11-29     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  E255-60     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Administration, Oral
Glucose / metabolism*
Glycogen / metabolism*
Humans
Liver / metabolism*
Male
Muscles / metabolism*
Physical Exertion*
Chemical
Reg. No./Substance:
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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