I'm feeling badly for my knees and my knees are feeling badly. All around the kneecap, my knees are complaining. I've read about this before in the writings of other beginning unicyclists. It seems to be a unicycle overuse problem. Sometimes it has to do with seat height, but I'm guessing that in my case it is overuse.
Over lunch today I did the 4 mile loop around campus and the experiment station, then in the evening went out to the track with other family members who were running. My knees felt quite tender before, during and after the evening session. I noticed that when I was doing the evening ride I could relax the muscles around the knee a bit, and the tenderness was reduced. Maybe this is important. I'll try to focus on relaxing around the knee and see if it helps.