The effects of respiratory muscle training on peak cough flow in patients with Parkinson’s disease: a randomized controlled study

Objective: To compare the effects of an inspiratory versus and expiratory muscle-training program on voluntary and reflex peak cough flow in patients with Parkinson disease. Design: A randomized controlled study. Setting: Home-based training program. Participants: In all, 40 participants with diagnosis of Parkinson’s disease were initially recruited in the study and randomly allocated to three study groups. Of them, 31 participants completed the...