Respiratory muscle training with the incentive spirometer resistive breathing device

Area of Science:

• Respiratory Physiology
• Exercise Science
• Rehabilitation Medicine

Background:

• Inspiratory muscle weakness can impair exercise capacity and quality of life.
• Previous studies on inspiratory muscle training (IMT) have yielded varied results.
• A novel device, the Inspiratory Strength Resistance Breathing Device (ISRBD), was used to deliver consistent inspiratory resistance.

Purpose of the Study:

• To investigate the effects of IMT using an ISRBD on respiratory muscle strength.
• To assess the impact of IMT on exercise performance, clinical manifestations, and activities of daily living.
• To evaluate the role of visual feedback and subject support in adherence to IMT.

Main Methods:

• Participants underwent a 4-week IMT program using an ISRBD, with sessions twice daily for 15 minutes.
• Inspiratory muscle strength was measured by maximal inspiratory pressure (PImax).
• Exercise performance was assessed using the 12-minute walk distance.

Main Results:

• Significant improvements were observed in respiratory muscle strength (PImax) and sputum expectoration (P < 0.05).
• No significant changes were found in exercise performance (12-minute walk distance), clinical symptoms, or activities of daily living.
• High compliance (98%) was achieved, potentially due to visual feedback and regular subject contact.

Conclusions:

• IMT using an ISRBD can effectively enhance respiratory muscle strength and aid in sputum expectoration.
• The current IMT protocol did not demonstrate benefits for exercise performance or daily living activities.
• Visual feedback and structured support appear crucial for maintaining high adherence in IMT programs.