Effects of Inspiratory Muscle Training and Positive Expiratory Pressure on Mechanically Ventilated Restrictive Lung Disease Patients

Inclusion Criteria: * Patients aged between 18 and 60 years. * Diagnosed with restrictive lung disease (RLD), including interstitial lung diseases, idiopathic pulmonary fibrosis, chest wall deformities, or neuromuscular diseases. * Admitted to the ICU and requiring invasive mechanical ventilation for more than 48 hours. * Glasgow Coma Scale score over 13, inspiratory pressures below -20 cmH2O, oxygen saturation above 90%, tidal volumes exceeding 5ml/kg, respiratory rates under 35 breaths per minute * Hemodynamically stable at the time of enrolment (as determined by the treating physician). Exclusion Criteria: * Pre-existing chronic obstructive pulmonary disease (COPD) or other primary obstructive pathologies. * Hemodynamic instability (e.g., requiring high-dose vasopressors). * Active pneumothorax or untreated bronchopleural fistula. * History of cranial or facial trauma, recent thoracic or abdominal surgery contraindicating the intervention. * Pre-existing cognitive impairment or inability to comprehend and cooperate with the training protocol.