Document Detail

Prolonged swimming exercise does not affect contents and fatty acids composition of rat muscle triacylglycerol.
MedLine Citation:
PMID:  19430193     Owner:  NLM     Status:  MEDLINE    
The present study investigated whether or not muscle triacylglycerol (MTG) contributed as a main energy source and MTG level and utilized fatty acid (FA) composition decreased during a 4-hour swimming exercise in rats fed a normal diet or a high-fat diet (HFD). Sixty male Wistar rats aged 5 weeks were fed a normal diet (CE-2, n = 25, experiment A) or HFD (n = 35, experiment B) for 22 days. On the final day, rats in both experiments were killed either without exercise or 1, 2, 3, or 4 hours after beginning the swimming exercise. MTG accumulation was higher in rats fed the HFD than those fed the CE-2 in both slow- and fast-typed muscles. Serum concentrations of free fatty acids (FFA) and glucose were increased and muscle glycogen contents were decreased with the continuance of swimming exercise, especially in rats fed the CE-2. The prolonged swimming did not influence MTG contents and FA compositions of MTG in either the experiment. These results might indicate that specific FA of MTG was not oxidized and MTG did not contribute as a main energy source during the prolonged swimming exercise in rats; instead, serum FFA, glucose, and muscle glycogen were mainly used.
Masaru Ochiai; Tatsuhiro Matsuo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oleo science     Volume:  58     ISSN:  1347-3352     ISO Abbreviation:  J Oleo Sci     Publication Date:  2009  
Date Detail:
Created Date:  2009-05-11     Completed Date:  2009-07-20     Revised Date:  2009-08-11    
Medline Journal Info:
Nlm Unique ID:  101175339     Medline TA:  J Oleo Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  313-21     Citation Subset:  IM    
Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa, Japan.
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MeSH Terms
Blood Glucose / analysis
Body Weight
Dietary Fats
Fatty Acids, Nonesterified / analysis*,  blood
Glycogen / metabolism
Muscles / anatomy & histology,  chemistry*
Organ Size
Organ Specificity
Physical Conditioning, Animal*
Rats, Wistar
Triglycerides / blood,  chemistry*
Reg. No./Substance:
0/Blood Glucose; 0/Dietary Fats; 0/Fatty Acids, Nonesterified; 0/Triglycerides; 9005-79-2/Glycogen

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