Inclusion Criteria:  Patients admitted in intensive care unit for COVID-19 related Acute Respiratory Distress Syndrome (ARDS) requiring invasive mechanical ventilation  Exclusion Criteria:  Pregnancy Hemodynamic instability (80-90 mmHg increase or 30-40 mmHg decrease systolic arterial pressure compared to baseline value or need of vasopressors to maintain systolic blood pressure higher than 85 mmHg or electrocardiogram evidence of ischemia/arrhythmias) Presence of pneumothorax and/or pneumomediastinum Contraindications to Electrical Impedance Tomography (pacemaker, implantable cardioverter defibrillator, thoracic drainages)