However, there has been little investigation of the effect of positive expiratory pressure in chronic obstructive pulmonary disease in terms of exercise endurance, dyspnoea, or dynamic hyperinflation.
We hypothesised that conical-PEP would be beneficial in increasing expiratory time via a reduction in respiratory rate and, consequently, reducing dynamic hyperinflation during exercise.
Our results clearly indicated that conical-PEP reduced dynamic hyperinflation.
Exercise training is the key component of pulmonary rehabilitation programs for chronic obstructive pulmonary disease but is often limited by early exercise-induced dyspnoea aggravated by dynamic hyperinflation (O'Donnell and Webb 2008).
Also, more complex exploration of the physiological mechanisms involved in exercise limitation as a consequence of dynamic hyperinflation would have been valuable.
O'Donnell DE, Revill SM, Webb KA (2001) Dynamic hyperinflation and exercise intolerance in chronic obstructive pulmonary disease.
O'Donnell DE, Webb KA (2008) The major limitation to exercise performance in COPD is dynamic hyperinflation.
Dynamic hyperinflation and tolerance to interval exercise in patients with advanced COPD.
Dyspnea, ventilatory system, and changes in dynamic hyperinflation related to the intensity of constant work rate exercise in COPD.