Document Detail


Exercise intensity, inflammatory signaling, and insulin resistance in obese rats.
MedLine Citation:
PMID:  20473230     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
PURPOSE: To evaluate the effects of intensity of exercise on insulin resistance and the expression of inflammatory proteins in the skeletal muscle of diet-induced obese (DIO) rats after a single bout of exercise.
METHODS: In the first exercise protocol, the rats swam for two 3-h bouts, separated by a 45-min rest period (with 6 h in duration--O + EXE), and in the second protocol, the rats were exercised with 45 min of swimming at 70% of the maximal lactate steady state--SS (DIO + MLSS).
RESULTS: Our data demonstrated that both protocols of exercise increased insulin sensitivity and increased insulin-stimulated tyrosine phosphorylation of insulin receptor and insulin receptor substrate 1 and serine phosphorylation of protein kinase B in the muscle of DIO rats by the same magnitude. In parallel, both exercise protocols also reduced protein tyrosine phosphatase 1B activity and insulin receptor substrate 1 serine phosphorylation, with concomitant reduction in c-jun N-terminal kinase and IJB kinase activities in the muscle of DIO rats in a similar fashion.
CONCLUSIONS: Thus, our data demonstrate that either exercise protocols with low intensity and high volume or exercise with moderate intensity and low volume represents different strategies to restore insulin sensitivity with the same efficacy.
Authors:
Adelino S R Da Silva; José R Pauli; Eduardo R Ropelle; Alexandre G Oliveira; Dennys E Cintra; Claudio T De Souza; Lício A Velloso; José B C Carvalheira; Mario J A Saad
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  42     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2180-8     Citation Subset:  IM; S    
Affiliation:
Department of Internal Medicine, Faculty of Medical Sciences State University of Campinas-UNICAMP, Campinas, São Paulo, Brazil.
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