↵^a Outcomes of respiratory muscle strength, lung volumes and flows, and health-related quality of life are presented as X̅±SD; higher scores indicate better functioning. Results of perceived respiratory function are presented as medians (interquartile range); higher scores indicate worse functioning. RIMT=resistive inspiratory muscle training, MIP=maximal inspiratory pressure, MEP=maximum expiratory pressure, FVC=forced vital capacity, FEV₁=forced expiratory volume in 1 second, PEF=peak expiratory flow, MVV=maximum ventilation volume, PCF=peak cough flow.