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Purpose : The purpose of the study was to investigate the effects of sustained maximal inspiration and balloon blowing breathing exercise on pulmonary function in school-age children with asthma.
Methods : Sample of 30 school-age children with asthma, aged 7-12 years old, who visited at the outpatient department, Phramongkutklao Hospital, were recruited and randomly divided into 2 groups. The first group (n = 15) trained with sustained maximal inspiration (SMI) breathing exercise while the second group (n = 15) training with balloon-blowing breathing exercise. Participants were required to complete breathing exercise 5 times per week for the consecutive of 8 weeks. Physiological characteristics and pulmonary function variables were measured before and after training. The dependent variables were analyzed by paired t-test andindependent sample t-test. Differences were considered to be significant at p < .05.
Results : The results indicated that there were no significant differences in physiological data such as body weight, height, resting heart rate, systolic blood pressure, and diastolic blood pressure between before and after 8-week training in both groups. In addition, after training, the forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), peak expiratory flow, and maximum voluntary ventilation (MVV) in balloon-blowing breathing exercise group were significantly higher than the pre-test (p < .05), with no significant differences observed in the sustained maximal inspiration (SMI) breathing exercise group, except for higher maximum voluntary ventilation (MVV) (p < .05). No significant changes in all variables were found between two groups.
Conclusion : The present findings demonstrated that 8 weeks of balloon-blowing breathing exercise had more beneficial effects on pulmonary function compared to SIM in school-age children with asthma.
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