Thanks for the tip. I was doing 40 mins at 9 after a 1 minute warm-up. For now I am cutting it down to 4. If I peddle faster I can still get my heart rate up there so I still get the cardio work in.

What a great suggestion, @contentandwell. Starting with a low resistance at first and then working up. I'm glad that you shared that.

I moved-up my apt. with the ortho and went to see him yesterday. X-rays taken and he said my implant has healed perfectly. Bone has grown around new knee and kneecap is perfectly aligned and all angles are perfect. He showed me how my quad muscle has actually atrophied even after all the hard work that I have done. His first thought was to do more pt but I told him I have everything I need to do the same things at home or the gym and that I already had eight weeks pt after surgery last June. So he agreed that I need to go back to basic pt exercises at home using ankle weights etc. Then he told me he is going to order me a device called the e-vive CyMedica ortho garment. It is a electric pulse device worn on leg that is designed by an ortho surgeon and used by athletes and people like me that need to build quad muscle. I was really surprised to see my left quad is measurably smaller than my right side. The doc said it is pretty common post tkr and that this new pulse therapy plus a re-doubling of my own pt will build my quad muscle and will eliminate the pain of climbing stairs. I look forward to getting on with it and I'm very happy to see that the implant is perfect as I was wondering if some thing loosened. I will post after the e-vive arrives and I have used it for awhile. Has anyone else heard of this or tried it?