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Inspiratory muscle training (IMT) can reverse or delay the complications from the deterioration of inspiratory muscle function in asthma. Thus, the IMT has been considered a treatment option for people with asthma. The aim of this study is to investigate the training principles of intensity, specificity and reversibility of IMT in asthmatics.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| High-intensity IMT | Experimental | Participants enrolled in this arm received high-intensity IMT |
|
| Low-intensity IMT | Active Comparator | Participants enrolled in this arm received low-intensity IMT |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| High-intensity IMT | Device | 30 breaths at 50% of the maximal inspiratory pressure, twice daily for 6 weeks |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in inspiratory muscle strength | Maximal inspiratory pressure | Baseline, 6 weeks later and 6 weeks after training |
| Change in expiratory muscle strength | Maximal expiratory pressure | Baseline, 6 weeks later and 6 weeks after training |
| Measure | Description | Time Frame |
|---|---|---|
| Change in asthma control | Asthma Control Questionnaire measures the adequacy of asthma control and change in asthma control which occurs either spontaneously or as a result of treatment. Scores range between 0 (totally controlled) and 6 (severely uncontrolled) | Baseline, 6 weeks later and 6 weeks after training |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Gardenia Maria Holanda Ferreira | Natal | Rio Grande do Norte | 59078-970 | Brazil |
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| ID | Term |
|---|---|
| D001249 | Asthma |
| ID | Term |
|---|---|
| D001982 | Bronchial Diseases |
| D012140 | Respiratory Tract Diseases |
| D008173 | Lung Diseases, Obstructive |
| D008171 | Lung Diseases |
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| Low-intensity IMT | Device | 30 breaths at 15% of the maximal inspiratory pressure, twice daily for 6 weeks |
|
| Change in quality of life |
Asthma Quality of Life Questionnaire is a disease-specific health-related quality of life instrument that taps both physical and emotional impact of disease. Scores range 1-7, with higher scores indicating better quality of life. |
| Baseline, 6 weeks later and 6 weeks after training |
| Change in six minute walk test distance | Six-minute walk test (6MWT) | Baseline, 6 weeks later and 6 weeks after training |
| Change in forced vital capacity | Forced vital capacity in litres and % of predicted | Baseline, 6 weeks later and 6 weeks after training |
| Change in forced expiratory volume | Forced expiratory volume in litres and % of predicted | Baseline, 6 weeks later and 6 weeks after training |
| Change in forced expiratory volume/forced vital capacity | Forced expiratory volume/forced vital capacity | Baseline, 6 weeks later and 6 weeks after training |
| Change in inspiratory muscle activity | Surface electromyography of inspiratory muscles | Baseline, 6 weeks later and 6 weeks after training |
| D012130 |
| Respiratory Hypersensitivity |
| D006969 | Hypersensitivity, Immediate |
| D006967 | Hypersensitivity |
| D007154 | Immune System Diseases |