I had a bad cycling accident in December, 2009. It bought me 8 weeks in a wheelchair. There are 10 screws and 2 titanium plates in my left pelvis. They tell me I will need a total hip replacement at some point, but no one can tell me when.

So I keep riding. Sometimes, my hip hurts. Sometimes, it doesn't. So what? It is what it is and I intend to put off hip replacement until I really, really need it, and then I plan to be back on the bike as soon as the bones heal. I don't know a single person whose hip replacement has prevented them from riding.