RESP-FIT: A technology-enhanced combined inspiratory and expiratory muscle strength training intervention for adults with COPD

This randomized, controlled pilot study compared outcomes (eg symptoms, respiratory muscle strength) with mHealth-enhanced respiratory muscle strength training versus no respiratory muscle strength training in 30 adults with COPD. As part of the study, pulmonary function (FEV1, FVC, FEV1/FVC ratio) was assessed at baseline and after 6 weeks using a Vitalograph COMPACT spirometer.