Inclusion Criteria:  Patients with COPD. Patients with Idiopathic Pulmonary Fibrosis. Patients who can read and write in French. Patients who agree to participate in research and sign the informed consent form. Patients who participated of our rehabilitation program or Patients who do not do any regular exercise activity.  Exclusion Criteria:  Regular use of Continuous Positive Airway Pressure devices (CPAP)