Effects of Expiratory Muscle Training on Cough Efficacy in Children and Adolescents With Cystic Fibrosis

The intensity of training will been determined after assessment of maximal expiratory pressure (MEP). The first training session will perform under the supervision of a physiotherapist, patients will perform training at home. MEP measurement will reevaluate every two weeks and the intensity of training will set according to MEP levels.