Primary outcomes
1. Inspiratory muscle strength
2. Exacerbations requiring a course of oral or inhaled
corticosteroids or emergency department visits
Secondary outcomes
1. Inspiratory muscle endurance
2. Expiratory muscle strength
3. Lung function
4. Asthma symptoms (e.g. measures of dyspnoea or
breathlessness with Borg score or a Visual Analogue Scale (VAS))
5. Hospital admissions
6. Use of reliever medication
7. Days off work or school
To evaluate the efficacy of inspiratory muscle training (IMT) with
either an external resistive device or threshold loading in people
with asthma.