I broke one of the tarsal bones (one of the long bone that runs from the toes back to the heel area). These bones act sort of like leaf springs, and absorb some of the shock when walking. I was in a walking cast for a month, at least, and it took literally YEARS before I could walk without some level of pain. Sorry!

I wasn't riding at the time, so I don't know how long it would have been to get back on a bike, but it would seem to me that the flexy-bendy spring action would be kind of the same.