Document Detail


Cardiovascular adaptations in 8- to 12-year-old boys following a 14-week running program.
MedLine Citation:
PMID:  8081319     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study examined the effects of a 14-week running program on VO2max, as well as cardiac output (Q) and arterial-venous O2 difference (a-vO2 dif) at submaximal intensities corresponding to 50 and 75% of VO2max. Thirteen boys (mean age 10.6 +/- 1.2 yrs) served as experimental subjects while 13 other boys of similar age (mean age 10.2 +/- 1.2 yrs) served as controls. Mean VO2max in the runners increased 13%, from 44.2 +/- 7.0 to 49.9 +/- 6.3 ml.kg-1.min-1. Posttraining VO2 during submaximal and maximal exercise was significantly (p < 0.05) greater in the runners than in the controls. Q and SV exhibited an increase of 10% at each intensity, but posttraining differences between groups were not significant (p > 0.05). A-vO2 dif increased by 8% at 50% of VO2max and by 6% at 75% of VO2max, and was significantly greater in the runners following training. These results indicate that increases in submaximal relative VO2 in children are mediated by increases in a-vO2 dif and Q.
Authors:
A D Mahon; P Vaccaro
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Canadian journal of applied physiology = Revue canadienne de physiologie appliquée     Volume:  19     ISSN:  1066-7814     ISO Abbreviation:  Can J Appl Physiol     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-10-13     Completed Date:  1994-10-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9306274     Medline TA:  Can J Appl Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  139-50     Citation Subset:  IM    
Affiliation:
Exercise Science Laboratory, University of Maryland, College Park 20742.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological*
Adolescent
Cardiovascular Physiological Phenomena*
Child
Heart Rate
Humans
Male
Oxygen Consumption
Physical Endurance / physiology*
Running / physiology*

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


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