UNIT 13 Mobility and Immobility. Mobility and Immobility. Introduction Mobility and immobility are critical concepts in nursing, particularly in patient care and rehabilitation. Mobility refers to the ability to move freely and independently, while immobility is the inability to move or a restriction in movement. Nurses play a key role in assessing mobility, preventing complications, and promoting rehabilitation. 1. Mobility in Nursing Definition: Mobility refers to the ability to move