Final answer:
A nurse should use proper body mechanics when repositioning an immobile client to avoid injuring her own musculoskeletal system.
Step-by-step explanation:
When repositioning an immobile client, a nurse should use proper body mechanics to avoid injuring her own musculoskeletal system. Proper body mechanics involve using correct posture and lifting techniques to minimize strain on the muscles and joints. For example, the nurse should bend her knees and use her legs to lift rather than relying on her back. This helps distribute the weight evenly and reduces the chance of back injuries.