Inspiratory muscle training reduces diaphragm activation and dyspnea during exercise in COPD

Among patients with COPD, those with the lowest maximal inspiratory pressures experience greater breathing discomfort (dyspnea) during exercise. In such individuals, inspiratory muscle training (IMT) may be associated with improvement of dyspnea but the mechanisms for this are poorly understood. The...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 2018-08, Vol.125 (2), p.381-392
Main Authors: Langer, Daniel, Ciavaglia, Casey E, Faisal, Azmy, Webb, Katherine A, Neder, J Alberto, Gosselink, Rik, Dacha, Sauwaluk, Topalovic, Marko, Ivanova, Anna, O'Donnell, Denis E
Format: Article
Language:English
Subjects:
Breathing
Chronic obstructive pulmonary disease
Diaphragm
Diaphragm (anatomy)
Discomfort
Durability
Dyspnea
Electromyography
Endurance
Exercise
Indexing
Lung diseases
Lungs
Mechanical loading
Mechanical ventilation
Muscle function
Muscle strength
Obstructive lung disease
Pressure effects
Respiration
Respiratory function
Training
Ventilation
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Summary:Among patients with COPD, those with the lowest maximal inspiratory pressures experience greater breathing discomfort (dyspnea) during exercise. In such individuals, inspiratory muscle training (IMT) may be associated with improvement of dyspnea but the mechanisms for this are poorly understood. Therefore, we aimed to identify physiological mechanisms of improvement in dyspnea and exercise endurance following inspiratory muscle training (IMT) in patients with COPD and low maximal inspiratory pressure (Pi,max). The effects of 8 weeks of controlled IMT on respiratory muscle function, dyspnea, respiratory mechanics, and diaphragm electromyography (EMGdi) during constant-work rate cycle exercise were evaluated in patients with activity-related dyspnea (Baseline Dyspnea Index
ISSN:8750-7587
1522-1601
DOI:10.1152/japplphysiol.01078.2017