Document Detail

Critical velocity during continuous and intermittent exercises in children.
MedLine Citation:
PMID:  16915406     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to apply the "critical velocity" concept to short intermittent high-intensity running exercises in prepubescent girls and boys and to compare the running performances obtained either by intermittent or continuous exercise runs. Eleven 8 to 11-year-old children underwent a maximal graded field test to determine peak oxygen uptake (peakVO2) and maximal aerobic velocity (MAV). During the six following sessions, they randomly performed three continuous runs (90, 100, and 110% of MAV) and three intermittent runs (120, 130, and 140% of MAV) until exhaustion. Intermittent exercises consisted of repeated 15 s runs each one separated by a 15 s passive recovery interval. For continuous as well as intermittent exercises, distance versus time to exhaustion (TTE) relationships were calculated to determine continuous (CVc) and intermittent (CVi) critical velocities. Values for peakVO2 and MAV were 45.8 +/- 5.3 ml x kg(-1) x min(-1) and 10.5 +/- 1.0 km h(-1), respectively. For the whole population, a significant relationship was found between the distance to exhaustion (DTE) and TTE for continuous (r2= 0.99, P < 0.05) and intermittent exercises (r2 = 0.99, P < 0.05). Significant relationships were found between peakVO2 and both CVc (r2= 0.60, P < 0.01) and CVi (r2= 0.47, P < 0.05). In conclusion, as for continuous exercises, a linear relationship was found between DTE and TTE for short high-intensity intermittent exercises. CVc was significantly related to peakVO2, while a significant lower relationship was found between peakVO2 and CVi.
Serge Berthoin; Georges Baquet; Gregory Dupont; Emmanuel Van Praagh
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-08-17
Journal Detail:
Title:  European journal of applied physiology     Volume:  98     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-09-29     Completed Date:  2006-11-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  132-8     Citation Subset:  IM    
Laboratory of Human Movement Studies (EA3608), Faculty of Sports Sciences and Physical Education, Lille 2 University, 9, Rue de l'Université, Ronchin, France.
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MeSH Terms
Anaerobic Threshold / physiology*
Differential Threshold / physiology
Exercise / physiology*
Exercise Test
Exercise Tolerance / physiology*
Oxygen Consumption / physiology*
Physical Exertion / physiology*
Running / physiology*
Task Performance and Analysis*

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