Back on the exercise bike

So about a month ago I was at home and had some time before a woodturning lesson. I decided that I need some footage of my bike to put into my videos. I thought some video of the chain going around the sprocket, the tires, breaks, pedals that kind of stock footage would be good. I mounted the video camera on a stick and went for a ride around the neighborhood. I was on the other street and either hit a rock or just lost my balance. (I am going with the rock) and down I went. I got some road rash on my knee, elbow and hand. My bike and the video camera were fine. I rushed home to get cleaned up and proceeded to teach my lesson about halfway through the lesson I reached for a tool and my shoulder hurt. When I finished up the lesson I went in and made a doctors appt. He recommended physical therapy. The tendon in my knee has been bothering me as well. So we are working on the knee and shoulder. I have been doing the pt for a few weeks now. Last weekend I did the Tour de Cure. We rode 129 miles over 2 days. So Monday morning I go in and the first thing they do is put me on the exercise bike. I was like "Really you want me to ride? I just spent all weekend on a bike. My butt is still sore." Anyway I did 2 miles on the bike and could fell it in my legs. The good news is my knee is feeling much better, now if I can just improve my shoulder I will be very happy.