Sorry to hear of your health problems. I have had 5 knee surgeries on my left knee and (4 new knee joints ) one was an Antibiotic Spacer. I was told not to put any weight on the spacer which prevented me doing any exercise or walking. I used a Walker to lift myself off the floor as I moved my right leg into position. I have knee joint #4 in place now praying for a more successful outcome. But we'll see.