OK. I bit the bullet and got a hip replacement this month at 68 years old. I want to run 12 to 15 miles weekly for another 20 years. My doctor recommends I don’t run, but gave me a metal on plastic hip to reduce the chance of fracture, since he knows I will run some. The testimonials on hiprunner are very encouraging. However, there is very little on how long the hip replacement will last-10, 15, 20 years-for a moderate amount of running. Does anyone have experience or data? How long until I can start rehab on an elliptical walker or with weights, then start running?