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Exercise performance and oxygen uptake efficiency slope in obese children performing standardized exercise.
1Department of Pathophysiology, Medical University, Plovdiv, Bulgaria. blim@plovdiv.techno-link.com
Acta Physiologica Et Pharmacologica Bulgarica
|October 23, 2003
Summary
Obese children showed higher metabolic cost and perceived exertion during exercise. Oxygen uptake efficiency slope (OUES) is a cardiopulmonary measure, but its interpretation in children is limited by anthropometric factors.
Area of Science:
- Pediatric Exercise Physiology
- Cardiopulmonary Function Assessment
- Obesity Research
Background:
- Oxygen uptake efficiency slope (OUES) is an established index for assessing submaximal cardiopulmonary function.
- Childhood obesity presents unique challenges for evaluating exercise capacity and physiological responses.
- Standardized exercise testing is crucial for objective physiological measurements in pediatric populations.
Purpose of the Study:
- To investigate exercise performance and OUES in obese children compared to healthy controls.
- To analyze the relationship between OUES, oxygen uptake, and anthropometric variables in children.
- To evaluate the utility of OUES as an objective measure of cardiopulmonary reserve in pediatric obesity.
Main Methods:
- Sixty children (6-17 years) underwent incremental treadmill exercise tests.
- Participants were categorized into obese (BMI 27.4±1.7) and control (BMI 18.8±1.0) groups, matched for age, sex, and height.
- Perceived exertion was measured using the CR-10 Borg scale; OUES was calculated and correlated with physiological and anthropometric data.
Main Results:
- Obese children exhibited shorter exercise duration but higher absolute peak oxygen uptake (VO2 peak).
- VO2 peak, adjusted for body mass, was significantly lower in obese children.
- No significant differences in absolute OUES values were observed between groups, but obese children reported higher perceived exertion.
Conclusions:
- Obesity is associated with increased absolute metabolic cost and perceived exertion during exercise in children.
- While OUES correlates with exercise parameters, its strong dependence on anthropometric variables complicates its use as a standalone exercise index in childhood.
- Further research is needed to refine OUES interpretation in pediatric populations, especially those with obesity.
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