These two graphs - volume of biking and walking - chart my progress during the first 9 weeks after my knee replacement on August 31st. Not sure if this is a “normal” progression, and I do wish I had kept track of knee flexion progress more religiously, but it does offer a quantitative baseline for my next knee replacement. (Clearly six weeks out was a critical moment, when I began to increase time and distance on foot, while reducing my reliance on the exercise bike.). Hopefully, my next surgery will have a similar linear progression without setbacks!