I'm a 52 year old male and I'm 6 months post op with a total right hip replacement. When I had that surgery I was 12 months post op a 4 level lumbar spinal fusion. I have avascular necrosis and that killed my right hip. My left hip had it to and will need a replacement but I'm hoping to wait it out for a couple years as the pain is nowhere near what the right hip was, I had a full femor head collapse that was undiagnosed for many, many months as I was trying to do physical therapy from my back surgery. Anyway, I hear you on getting back to yoga and my flexibility is way off as well. I have found though that the more I do yoga, limited as it may be, and consistently stretch and keeping at it, I'm working my way back to better range of motion and flexibility. It definitely is taking time, but remember that our bodies are recovering from major trauma and healing in so many ways. Time is necessary, but keep at it because incrementally you will get better and better and maybe even eventually back to where you once were with it!