Document Detail


Effects of strength training on work capacity and parasympathetic heart rate modulation during exercise in physically inactive men.
MedLine Citation:
PMID:  19685416     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study was designed to assess the effects of strength training on work capacity and parasympathetic heart rate modulation during exercise in physically inactive men. Seventy-four men aged 20-45 were randomly assigned to training (n=52) and control (n=22) groups. Training groups underwent 10-weeks of progressive strength training. Body composition, one-repetition maximum half-squat and maximal oxygen uptake were measured before and after the intervention. Respiratory gases, heart rate and blood lactate were recorded during a VO2max test on a cycle ergometer. Parasympathetic heart rate modulation was analyzed based on the standard deviation of instantaneous beat-to-beat R-R interval variability (SD1) and its normalized unit (SD1n). Muscle strength and lean body mass increased in the training group. Compared to the control group, time to exhaustion increased significantly in the training group (p<0.05). SD1 and SD1n were elevated in the training group at submaximal exercise intensities (100 W, p<0.05). Blood lactate decreased at submaximal intensities when compared to the control group. Strength training increased exercise capacity, and improved vagal modulation of heart rate at submaximal exercise intensities. These changes may have favourable cardiovascular health implications for sedentary men during normal daily activities.
Authors:
M Hu; T Finni; L Zou; M Perhonen; M Sedliak; M Alen; S Cheng
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2009-08-14
Journal Detail:
Title:  International journal of sports medicine     Volume:  30     ISSN:  1439-3964     ISO Abbreviation:  Int J Sports Med     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-07     Completed Date:  2009-11-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  719-24     Citation Subset:  IM    
Copyright Information:
Georg Thieme Verlag KG Stuttgart New York.
Affiliation:
Laboratory Centre for Sport Science and Medicine, Guangzhou Institute of Physical Education, Guangzhou, China.
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Body Composition
Ergometry
Exercise Test*
Exercise Therapy
Heart Rate / physiology*
Humans
Lactates / blood
Male
Middle Aged
Oxygen Consumption / physiology
Parasympathetic Nervous System / physiology*
Resistance Training*
Work Capacity Evaluation
Young Adult
Chemical
Reg. No./Substance:
0/Lactates

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


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