Alvaro Reyes1, Adrián Castillo2, Javiera Castillo3, Isabel Cornejo4. 1. 1 Escuela de Kinesiologia, Facultad de Ciencias de la Rehabilitacion, Universidad Andres Bello, Santiago, Chile. 2. 2 Carrera de Fonoaudiologia, Departamento Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Catolica de Chile, Santiago, Chile. 3. 3 Escuela de Fonoaudiologia, Facultad de Ciencias, Universidad Mayor, Santiago, Chile. 4. 4 Carrera de Kinesiologia, Facultad de Ciencias de la Salud, Universidad San Sebastián, Santiago, Chile.
Abstract
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 study protocol (control group, n = 10; inspiratory training group, n = 11; and expiratory training group, n = 10) Intervention: The inspiratory and expiratory group performed a home-based inspiratory and expiratory muscle-training program, respectively (five sets of five repetitions). Both groups trained six times a week for two months using a progressively increased resistance. The control group performed expiratory muscle training using the same protocol and a fixed resistance. MAIN MEASURES: Spirometric indices, maximum inspiratory pressure, maximum expiratory pressure, and peak cough flow during voluntary and reflex cough were assessed before and at two months after training. RESULTS: The magnitude of increase in maximum expiratory pressure ( d = 1.40) and voluntary peak cough flow ( d = 0.89) was greater for the expiratory muscle-training group in comparison to the control group. Reflex peak cough flow had a moderate effect ( d = 0.27) in the expiratory group in comparison to the control group. Slow vital capacity ( d = 0.13) and forced vital capacity ( d = 0.02) had trivial effects in the expiratory versus the control group. CONCLUSIONS: Two months of expiratory muscle-training program was more beneficial than inspiratory muscle-training program for improving maximum expiratory pressure and voluntary peak cough flow in patients with Parkinson's disease.
RCT Entities:
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 study protocol (control group, n = 10; inspiratory training group, n = 11; and expiratory training group, n = 10) Intervention: The inspiratory and expiratory group performed a home-based inspiratory and expiratory muscle-training program, respectively (five sets of five repetitions). Both groups trained six times a week for two months using a progressively increased resistance. The control group performed expiratory muscle training using the same protocol and a fixed resistance. MAIN MEASURES: Spirometric indices, maximum inspiratory pressure, maximum expiratory pressure, and peak cough flow during voluntary and reflex cough were assessed before and at two months after training. RESULTS: The magnitude of increase in maximum expiratory pressure ( d = 1.40) and voluntary peak cough flow ( d = 0.89) was greater for the expiratory muscle-training group in comparison to the control group. Reflex peak cough flow had a moderate effect ( d = 0.27) in the expiratory group in comparison to the control group. Slow vital capacity ( d = 0.13) and forced vital capacity ( d = 0.02) had trivial effects in the expiratory versus the control group. CONCLUSIONS: Two months of expiratory muscle-training program was more beneficial than inspiratory muscle-training program for improving maximum expiratory pressure and voluntary peak cough flow in patients with Parkinson's disease.
Authors: Jacqueline A Osborne; Rachel Botkin; Cristina Colon-Semenza; Tamara R DeAngelis; Oscar G Gallardo; Heidi Kosakowski; Justin Martello; Sujata Pradhan; Miriam Rafferty; Janet L Readinger; Abigail L Whitt; Terry D Ellis Journal: Phys Ther Date: 2022-04-01