ROBot Assisted Physical Training of Older Patients During acUte hospitaliSaTion

Inclusion Criteria: * ≥65 years of age * Able to ambulate before hospitalisation (with/without assistance) * Able to communicate with the research team * Expected length of stay ≥2 days * Residing on Funen, Denmark Exclusion Criteria: * Able to ambulate without assistance during current hospitalisation * Known severe dementia * Positive Confusion and Assessment Method score (20) * Patients who have received less than 3 training sessions at discharge * Terminal illness * Recent major surgery or lower extremity bone fracture in the last 3 months * Conditions contradicting use of ROBERT (unstable vertebral-, pelvic, or lower extremity fractures; high intracranial pressure; pressure ulcers or risk of developing pressure ulcers due to fragile skin; patients with medical instability) * Metastases at femur or hip * Deemed not suitable for mobilization sessions with the robot by the healthcare professional * If the patient weighs more than 165 kg (the robot cannot lift the leg if the patient is severely overweight)