Ride/Race After Total Knee Replacement

I had my right knee done last week, May 9th. I'll be 61 in a couple weeks. My doc believes in getting back to your normal life as soon as possible. I asked about riding dirtbikes. He said, "NO RUNNING", no falling on my knee. Hiking, deer hunting, side hilling on foot, "NO RUNNING", no falling on the knee. He basically said no restrictions and he could revise anything I could do to it.

So for the medical pros in particular and the group in general, what is the feeling on riding/racing after a TKR. I am new knee braces and interestingly, I pulled my groin on a front end washout and kind of feel like the knee braces contributed because my leg went sideways instead of maybe sweeping back. I track ride and race moto occasionally and have never had a major injury from racing. I never even wore knee braces until this year.