Joint surgery is no picnic. My wife has had a complete hip reconstruction and two hip replacements. They had to replace the hip where they did the reconstruction because of the arthritis setting in faster than they predicted. I hope yours goes as planned and that you are back on the bike agin in no time. At least you have the trainer. In the winter, I would ride on my Minoura trainer while watching NCIS reruns on cable. Not exactly riding on the road but better than sitting on the couch.