Final answer:
Patients should avoid deep-breathing and coughing exercises after a total knee replacement surgery.
Step-by-step explanation:
After a total knee replacement surgery, a patient must avoid deep-breathing and coughing exercises. These exercises can put strain on the surgical incision and the knee joint, potentially causing complications such as bleeding, swelling, or infection. It is important for patients to follow the instructions provided by their healthcare provider to ensure proper healing and minimize the risk of post-surgery complications.