Resistive breathing training in severe chronic obstructive pulmonary disease. A pilot study

Area of Science:

• Pulmonary Medicine
• Respiratory Physiology
• Rehabilitation Science

Background:

• Chronic Obstructive Pulmonary Disease (COPD) is a severe respiratory condition.
• Diaphragmatic fatigue and failure are common in patients with disabling COPD.
• Inspiratory resistive loading can exacerbate diaphragmatic dysfunction.

Purpose of the Study:

• To investigate the effects of resistive breathing training on diaphragmatic function in severe COPD patients.
• To assess the impact of training on exercise tolerance and daily living activities.
• To evaluate the efficacy of a simple resistive breathing device.

Main Methods:

• 10 patients with long-standing, severe COPD underwent a 4-week resistive breathing training program.
• Training involved inspiring against a progressively increasing inspiratory resistive load.
• Diaphragmatic fatigue and failure were monitored using surface electromyography (EMG) and thoracoabdominal motion analysis.

Main Results:

• All patients demonstrated improvement, tolerating higher inspiratory resistances without fatigue or failure.
• Training led to enhanced diaphragmatic function and reduced signs of respiratory muscle fatigue.
• Patients reported subjective improvements in daily activities and reduced shortness of breath.

Conclusions:

• Resistive breathing training is an effective intervention for improving diaphragmatic function in severe COPD.
• This training enhances exercise capacity and quality of life for individuals with COPD.
• The simple resistive device may also aid in expectoration, potentially due to expiratory resistance.