Bed Rest and Muscle Strength in ICU: Interest in the Early Association of NEMS With Cyclo-ergometer Mobilization

Inclusion Criteria: * Patient affiliated to a social security scheme * Patient hospitalized in intensive care unit for medical or surgical reasons, under assisted ventilation (invasive, non-invasive ventilation or oxygen-therapy at high speed via the Optiflow(r) system delivering a flow between 30 and 60 L.min and a FiO2 between 30 and 100%) * State of the patient deemed stable buy the doctor responsible for the care and allowing the action of the physiotherapist (acts on medical prescription) * Age more than 18 years old (major patient) and less than 75 years old * Duration of mechanical ventilation (invasive or not) less than or equal to 72 hours at the beginning of the inclusion * Predicable duration of stay greater than or equal to 3 days Exclusion Criteria: * Impossibility to know the consent of the patient, his legal representative or the person of trust * Patient under safeguard of justice, tutorship or curatorship * Legionnaire not rectified * Cardiac stimulator or defibrillator * Cardiorespiratory state clinically not compatible withe early mobilization * Neurological problems: intracranial pressure \> 20 mmHg, presence of ICU acquired neuropathy, pre-existing diagnosis of neuromuscular disease (MS, ALS...), acute stroke, epilepsy * Orthopedic problems: even partial amputation of a lower limb, unstable fracture, suspicion of fracture, non-fixed spinal cord injury, use of a technique that does not allow to comply with postoperative surgical instructions (range of motion, discharge...), untreated deep vein thrombosis, traumatic sequelae to the origin of disabling manifest muscle weakness of a lower limb at admission * Dermatological problems: severe lesions or complex dressing in the lower limbs * Morphological criteria : size \< 1.5m, BMI \> 35 * Confirmed psychiatric illness or severe agitation * Abdominal surgery without protection by compression belt (medical prescription), or too fragile (medical opinion) * Pregnant or lactating women (postpartum is not an exclusion criterion) * Patients over 75 years old * Hemiplegia / sequential hemiparesis * Impossibility to practice electrostimulation on at least one lower limb (manifest muscle weakness of a lower limb at admission (e. g. related to a traumatic sequelae)