Shahin, Barakat Benefits of short inspiratory muscle training on exercise capacity, dyspnea, and inspiratory fraction in COPD patients. [electronic resource] - International journal of chronic obstructive pulmonary disease 2008 - 423-7 p. digital Publication Type: Journal Article ISSN: 1176-9106 Standard No.: 10.2147/copd.s1822 doi Subjects--Topical Terms: AgedBreathing ExercisesExercise ToleranceFemaleHumansMaleMiddle AgedPrognosisPulmonary Disease, Chronic Obstructive--physiopathologyRespiratory Muscles--physiopathology