Effects of Training Intensity on Physical Fitness and Body Composition in Cystic Fibrosis

Inclusion Criteria: * confirmed diagnosis of cystic fibrosis by at least 2 sweat tests and / or by the presence of two CF mutations, * willingness to participate in and to comply with the research project procedure, * written informed consent of patients, * age ≥ 18 years, * FEV1 of pred. ≥ 40%, * Stable condition (as indicated by absence of one or more signs: new or increased haemoptysis, increased malaise, fatigue or lethargy, temperature over 38°C, weight loss, sinus pain and a decrease in pulmonary function by 10% or more) Exclusion Criteria: * Severe pulmonary exacerbation, * cor pulmonale, * musculoskeletal discomfort that makes a regular exercise training impossible, * untreated CF-related diabetes