Document Detail

Exercise training-induced changes in heart rate recovery in obese men with metabolic syndrome.
MedLine Citation:
PMID:  19450157     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Heart rate recovery (HRR) as a function of vagal reactivation, which is an independent risk predictor for cardiovascular disease and mortality, is strongly associated with metabolic syndrome. METHODS: Middle-aged obese men (metabolic syndrome, n = 20; non-metabolic syndrome, n = 22) classified on the basis of Adult Treatment Panel III criteria were investigated in this study. Postexercise HRR and the HRR decay constant following a symptom-limited bicycle exercise test were evaluated before and after a 12-week exercise training program (60-70% of maximal heart rate; 60 minutes per day; 3 days per week). RESULTS: Although the peak HR remained unchanged, HR at anaerobic threshold significantly decreased for both groups after exercise training; HR at rest was significantly decreased in the metabolic syndrome group after training (P < 0.05). HRR significantly improved in the metabolic syndrome group (-26.1 +/- 3.6 beats/minute vs. -33.5 +/- 3.8 beats/minute, at 1 minute; -39.9 +/- 4.9 beats/minute vs. -49.5 +/- 4.9 beats/minute, at 2 minute, P < 0.05) with no change for the non-metabolic syndrome group (P > 0.05). HRR decay constant values showed significant improvement in the metabolic syndrome group (0.31 +/- 0.02%/second vs. 0.35 +/- 0.02%/second, P = 0.038) after exercise training but not the non-metabolic syndrome group (P > 0.05). CONCLUSIONS: This study demonstrated that moderate-intensity physical training without caloric restrictions improves HRR in obese men with metabolic syndrome, possibly due to a reduction in the resting HR. Therefore, weight loss-induced exercise training would help in improving the resting HR, and the responsiveness of the autonomic nervous system in obese men with metabolic syndrome.
Maeng-Kyu Kim; Kiyoji Tanaka; Mi-Ji Kim; Tomoaki Matsuo; Ryuichi Ajisaka
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Metabolic syndrome and related disorders     Volume:  7     ISSN:  1557-8518     ISO Abbreviation:  Metab Syndr Relat Disord     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-05     Completed Date:  2009-12-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101150318     Medline TA:  Metab Syndr Relat Disord     Country:  United States    
Other Details:
Languages:  eng     Pagination:  469-76     Citation Subset:  IM    
Department of Sports Medicine for Health and Disease, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
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MeSH Terms
Anaerobic Threshold
Autonomic Nervous System / physiopathology
Exercise Test
Exercise Therapy*
Heart Rate*
Metabolic Syndrome X / complications,  physiopathology,  therapy*
Middle Aged
Obesity / complications,  physiopathology,  therapy*
Recovery of Function
Time Factors
Treatment Outcome

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

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