High-intensity inspiratory muscle training in bronchiectasis: A randomized controlled trial

Area of Science:

• Respiratory Medicine
• Pulmonary Rehabilitation
• Exercise Physiology

Background:

• Inspiratory muscle training (IMT) is known to enhance inspiratory muscle function.
• Its impact on exercise capacity in bronchiectasis requires further investigation.

Purpose of the Study:

• To evaluate the effects of high-intensity IMT (H-IMT) on exercise capacity in patients with bronchiectasis.
• To assess changes in respiratory muscle strength, endurance, dyspnea, fatigue, and quality of life.

Main Methods:

• Forty-five patients with bronchiectasis were randomized into H-IMT or control groups.
• The H-IMT group trained for 8 weeks at >=70% maximal inspiratory pressure (MIP).
• The control group underwent low-intensity IMT at 10% MIP.

Main Results:

• H-IMT significantly increased MIP, maximal expiratory pressure (MEP), and incremental shuttle walk distance compared to controls.
• Significant improvements in pressure-time units were observed in the H-IMT group.
• Fatigue decreased in both groups, and the H-IMT group showed improved social aspects of quality of life.

Conclusions:

• High-intensity IMT is effective in enhancing exercise capacity in non-cystic fibrosis bronchiectasis patients.
• H-IMT improves respiratory muscle strength and endurance.
• The intervention positively influences the social domain of quality of life and reduces fatigue.