I'm just coming up on my one year anniversary of a fall off of my roof, blew out my left acetabulum. Non weight bearing 10 weeks, well almost I did a lot of cheating. I did a recumbent stationary bike 3 weeks after surgery non load bearing and that helped a lot as well. After a year I am finally back up to speed and just back up to distance. Riding is easy on the hip, walking is not. The good thing about falling off of a roof is that I am not afraid to ride my bike fast, cleaning gutters is another matter.