Inclusion Criteria:  One or both the following points:  need for 24-hour oxygen therapy to have a resting SpO2 of at least 94% or exercise-induced desaturation, defined as a reduction of at least 3% of SpO2 mean measured during the 6-minute test (6MWT) compared to SpO2 measured at rest reduced tolerance to effort highlighted by the 6MWT with a value of the meters travelled less than 70 percent of the predicted one  Exclusion Criteria:  Hemodynamic instability and the presence of uncontrolled cardiac arrhythmias Any clinical condition that contraindicates aerobic exercise Presence of motor disability before hospitalization which made it impossible to walk independently (Rankin scale> 3) (10) Impaired cognitive status (Mini Mental State Examination test <24) Inability to use (by the patient or a caregiver) the technological means sufficient to follow the program (mobile phone with internet connection) Lack of supervision by a caregiver in case of walking and standing instability Contacts/Locations