My first arthroscopic my MD really told me to start biking and stop running...that's when I got back into cycling. After 17 years or so of reffing college basketball, my knees were burned out and I had a double knee replacement in November of '07. Anyway, riding a stationary bike was a big part of the protocol, and now I ride a real bike nearly 10 miles aweek. They did caution me about falling however, but that was just the normal, "gotta be careful and I have to tell you this" routine.
Tim C.