I scheduled my knee replacements 12 weeks apart, the left knee in April and the right knee in July. I started flat trail bike riding 8 weeks after the first knee. My thoughts were that the second knee does take some abuse while you are rehabing the first knee. I wanted to make sure that the muscles around the second knee were back in shape prior to the TKR. The bike riding was low impact excerise that helped with both knees between TKR's. I kept a timeline of my process so that I could track my progress. My first surgery was on April 14th, 2017 and the second knee was done on July 10th, 2017. I have a note that I was walking between 3000 and 4000 steps a day on August 28th, 2017. A couple of other tips that helped me are: Try not to do too much too soon. When you think you have iced enough, ice it more. Be dedicated to doing your therapy routine when the therapist is not with you. It has been 23 months since I started this process and I still do my knee exercise routine everyday. Everyone is different and my timeline is an just an example. Pay attention to your own body/knees and adjust your schedule. Good Luck!