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Study of exercise induced bronchospasm by various loading tests.

J Kelemen, E Cserháti, G Mezei

    Acta Paediatrica Hungarica
    |January 1, 1984
    PubMed
    Summary
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    Physical exercise can improve respiratory function in healthy children but rarely in those with asthma. Free running is best for showing exercise-induced bronchospasm in pediatric asthma patients.

    Area of Science:

    • Pediatric Pulmonology
    • Exercise Physiology

    Background:

    • Asthma is a common chronic respiratory disease in children.
    • Exercise can trigger respiratory symptoms in individuals with asthma.

    Purpose of the Study:

    • To compare the effects of different exercise tests on respiratory function in children with and without asthma.
    • To determine the most effective method for demonstrating exercise-induced bronchospasm in pediatric asthma patients.

    Main Methods:

    • 378 children with asthma and 87 healthy children underwent three types of physical loading tests: free running, stairstep test/skipping, and bicycle ergometry.
    • Respiratory function was assessed before and after exercise.
    • The occurrence and severity of exercise-induced bronchospasm were recorded.

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    Main Results:

    • Physical exercise improved respiratory function in 32% of healthy children, compared to only 7% of asthmatic children.
    • Appreciable bronchial dilatation (>20% improvement) was not observed in any asthma patients.
    • Exercise-induced bronchospasm occurred most frequently after free running (most sensitive) and least after bicycle ergometry (least sensitive).
    • Using three loading tests, exercise-induced bronchospasm was demonstrated in 52% of pediatric asthma patients.

    Conclusions:

    • Different exercise tests have varying efficacy in demonstrating exercise-induced bronchospasm in children.
    • Free running appears to be the most sensitive method for diagnosing exercise-induced bronchospasm in pediatric asthma.
    • Comprehensive testing can reveal exercise-induced bronchospasm in a significant proportion of children with asthma.