Int J Sports Med 2006; 27(11): 864-869
DOI: 10.1055/s-2006-923787
Physiology & Biochemistry

© Georg Thieme Verlag KG Stuttgart · New York

Performance and Muscle Oxygenation during Isometric Exercise and Recovery in Children with Congenital Heart Diseases

W. Moalla1 , G. Dupont2 , F. Costes3 , R. Gauthier4 , Y. Maingourd4 , S. Ahmaidi1
  • 1EA 3300-APS et Conduites Motrices: Adaptations et Réadaptations, Faculté des Sciences du Sport, Université de Picardie, Amiens, France
  • 2Laboratoire d'Etudes de la Motricité Humaine, Faculté des Sciences du Sport et de l'Education Physique, Université Lille II, Lille, France
  • 3Laboratoire de Physiologie, GIP Exercice, Université Jean Monnet, Saint Etienne, France
  • 4Services des Explorations Cardio-Pulmonaires Pédiatriques, Hôpital Nord, Amiens, France
Further Information

Publication History

Accepted after revision: December 5, 2005

Publication Date:
17 August 2006 (online)

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Abstract

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 (DmO2), half time of recovery (TœR), 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 · 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. DmO2 was larger in patients, which reflected pronounced deoxygenation. During recovery, the patients exhibited a longer TœR (25.2 ± 2.1 vs. 18.4 ± 2.0 s, p < 0.05) and RS (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.

References

Dr. Wassim Moalla

Faculté des Sciences du Sport
Laboratoire APS et Conduites Motrice: Adaptions-Réadaptions

Allée P. Grousset

80025 Amiens

France

Phone: + 33664371644

Fax: + 33 3 22 72 14 81

Email: wassim.moalla@gmail.com