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Physiological Effects of a Physical Training Program in Children with Exercise-Induced Asthma
M Jonathan King1, Timothy David Noakes1, Eugene Godfrey Weinberg2
1MRC/UCT Bioenergetics of Exercise Research Unit, Department of Physiology, University of Cape Town Medical School, Observatory, 7925, South Africa.
Pediatric Exercise Science
|February 2, 2023
Summary
Regular exercise training improved physical fitness and clinical asthma symptoms in boys, but did not alter exercise-induced asthma (EIA) severity.
Area of Science:
- Pediatric Pulmonology
- Sports Medicine
- Exercise Physiology
Background:
- Atopic asthma is a chronic respiratory condition affecting children.
- Exercise can trigger asthma symptoms, known as exercise-induced asthma (EIA).
- The impact of structured exercise training on asthma control and EIA is an area of ongoing research.
Purpose of the Study:
- To investigate the effects of a 3-month exercise training program on physical fitness and asthma parameters in boys with atopic asthma.
- To determine if exercise training influences exercise-induced asthma (EIA).
Main Methods:
- Twelve boys (ages 9-14) with atopic asthma were divided into exercise and control groups.
- The exercise group underwent a 3-month training program.
- Measurements of physical fitness (V̇O2max, peak running velocity, lactate threshold) and asthma status were taken before and after the trial.
Main Results:
- The trained group showed significant improvements in V̇O2max and peak running velocity.
- Trained subjects exhibited a higher velocity at lactate threshold and lower heart rate during submaximal exercise post-training.
- Subjective and objective measures indicated improved clinical asthma control (reduced medication, fewer attacks) in the trained group.
- Exercise-induced asthma (EIA) severity, assessed by airway response to a treadmill run, remained unchanged.
Conclusions:
- Structured exercise training enhances physical fitness and improves clinical asthma control in prepubescent boys.
- Despite improvements in overall asthma management, exercise training does not appear to modify the severity of exercise-induced asthma (EIA).
- Further research is needed to explore strategies for mitigating EIA in asthmatic children undergoing exercise programs.
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