CFTR and cystic fibrosis: In a study with people in the critical caresetting, nutritional and exercise-focused interventions were shown to help maintainmuscle quality (and prevent muscle wasting).35 In our study cohort, theadults with CF were mostly well-nourished, and all participants were engaged in somePA, with some in strengthening exercise, which may help maintain the integrity ofmuscle quality, despite CFTR protein dysfunction.