What everyone above said. PT was telling me I should be walking further then I could. I am 4 months out and can do about 30 minutes before it gets “tired”. I also cycle and do Pilates. Stretching was/is key for me. I was knock kneed so he straightened it and my muscles were all confused. At 4 weeks, I felt lucky to be getting my exercises in 5 times a day. My PA said you want to over exaggerate the heel/toe movement when you walk. I feel you have to retrain your brain and muscles.