…when the swelling comes down– that's when you can accomplish something. So, my take on it is that those things that help get the swelling down is job-#1 (full weight bearing as tolerated but otherwise, elevation, compression, icing). Of interest, however, recent studies now question whether CPM is of any help in achieving good ROM, although my guess is that there probably is some feedback benefit to be had for anyone who is not familiar with the pain involved and needs to see that the leg actually can bend...