Alright, all,

Thanks for the tips. I'm certain that I've actually injured something--I was actually remembering that I originally felt something while stretching to run back in the fall. I had a sudden, sharp pain under the kneecap. Everything I've read points to patellar tendonitis as the culprit. As far as gears go, I'm running pretty low gears, I think: 44x19. I brought it down after I received suggestions from others on this board. My positioning: I've been VERY diligent about adjusting this: got a new, longer-reach stem, fixed the saddle height and tilt, etc. I know that this is coming about because I've just jumped in really hard, really quickly (kind of did that with basketball the other night, also). Now, from experience and the inevitable, good lessons I've got from aging, I do NOT want to exacerbate the situation and I'd like to work on rehabbing the knee BEFORE I actually have to go through rehab. Also want to start running again, but no way I'm going to do it while it's feeling like this.

What are chair sits, exactly? How do I do 'em at home? Anyone know some good PTherapy links, I'd love to check them out. Thanks again, everybody!