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[Ventilatory response to maximal exercise in healthy children]
J Prioux1, S Matecki, F Amsallem
1Service central de Physiologie clinique, Hôpital Arnaud de Villeneuve, Montpellier, France. jacques.prioux@staps.univ-nantes.fr
Revue Des Maladies Respiratoires
|January 27, 2004
Summary
Maximal ventilation and tidal volume in children increase with age, influenced by body mass. These ventilatory parameters are crucial for understanding exercise tolerance in pediatric populations.
Area of Science:
- Pediatric Exercise Physiology
- Respiratory Physiology
Context:
- Assessing ventilatory response during exercise is crucial for understanding exercise tolerance in children.
- Published literature on maximal ventilatory parameters in healthy children is reviewed.
Purpose:
- To systematically review and describe the variables and values of maximal ventilatory parameters in healthy children.
- To synthesize existing data on maximal ventilation (VEmax) and tidal volume (VTmax) in pediatric populations.
Summary:
- Maximal ventilation (VEmax) and tidal volume (VTmax) exhibit linear increases with age, plateauing earlier in girls (13 years) than boys (15 years).
- Lean body mass is a primary determinant of VEmax and VTmax, with VTmax averaging 30 ml/kg in pre-puberty.
- Ventilatory reserves and VTmax relative to vital capacity increase with age, reaching 30% and 50% by 17 years, respectively. Time-related parameters like the TI/TTOT ratio (0.5) and respiratory frequency are largely independent of anthropometrics.
Impact:
- Provides a comprehensive overview of established maximal ventilatory parameters in healthy children.
- Highlights the need for larger, allometric-equation-based studies to establish robust reference values for pediatric exercise physiology.
- Informs clinical and research practices related to pediatric exercise testing and interpretation.