Document Detail

Performance and muscle oxygenation during isometric exercise and recovery in children with congenital heart diseases.
MedLine Citation:
PMID:  17120346     Owner:  NLM     Status:  MEDLINE    
This study investigated performance, muscle oxygen saturation (StO2), and blood volume (BV) in patients with congenital heart diseases (CHD) and healthy children during and following sustained exercise. Maximal volunteered contraction (MVC) and endurance at 50 % of MVC (time to exhaustion, Tlim) of the knee extensor were measured in nine patients with CHD and 14 healthy control children. Near infrared spectroscopy was used to evaluated StO2 and BV in vastus lateralis. The drop in muscle oxygen saturation (D(mO2)), half time of recovery (T(SR)), and recovery speed to maximal oxygen saturation (Rs) were analyzed. Patients with CHD showed lower MVC (101.0 +/- 6.2 vs. 125.5 +/- 7.4 N x m, p < 0.01) and Tlim (67.0 +/- 7.5 vs. 127.5 +/- 11.1 s, p < 0.001) than control children. StO2 and BV values in both groups were similar at rest and decreased at the onset of contraction. D(mO2) was larger in patients, which reflected pronounced deoxygenation. During recovery, the patients exhibited a longer TSR (25.2 +/- 2.1 vs. 18.4 +/- 2.0 s, p < 0.05) and R(S) (64.6 +/- 5.5 vs. 42.7 +/- 4.6 s, p < 0.01) than control children. We concluded that reduced strength and endurance in patients with CHD were associated with an impairment of StO2 and BV, and a slower reoxygenation during recovery.
W Moalla; G Dupont; F Costes; R Gauthier; Y Maingourd; S Ahmaidi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sports medicine     Volume:  27     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2006-11-21     Completed Date:  2007-03-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  864-9     Citation Subset:  IM    
EA 3300-APS et Conduites Motrices: Adaptations et Réadaptations, Faculté des Sciences du Sport, Université de Picardie, Amiens, France.
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MeSH Terms
Analysis of Variance
Blood Volume / physiology*
Case-Control Studies
Exercise / physiology*
Heart Defects, Congenital / metabolism,  physiopathology*
Muscle Contraction / physiology
Muscle Strength / physiology
Muscle, Skeletal / metabolism,  physiology*
Oxygen Consumption / physiology*
Physical Endurance / physiology
Spectrophotometry, Infrared / methods
Statistics, Nonparametric

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

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