Hey Pooki, Let me add this as an incentive for you.
I have a good friend...age 59.... who has had both hips, and both knees replaced. One of his hips has been done more than once.
He is still riding. (although he rides a BMW, We won't hold that against him!!)
My point is....He has said many times that gutting thru the pain, and pushing himself to the max during his rehab, is what he credits to the range of motion and the strength he is able to maintain.
He also has said that you need to set goals for yourself during that time and work toward those goals.
Glad you are doing well. Keep up the good work and we'll keep you in our prayers.