This is a test of commonsense. Complete the next sentence:

How to rehab your knee after acl surgery 
Use a knee brace to stabilize your knee following surgery. 
In the hours following surgery, a knee brace will be place around your knee to support and stabilize it. This knee brace should be worn over the next 4 to 6 weeks, while your knee is at rest (i.e. it shouldn't be worn while you are performing rehabilitation exercises).
Make sure the brace is worn around the kneecap and that it is secured tightly. Keep your knee elevated to avoid swelling.