After some aggressive riding for about a month in April, I developed what I could best describe as a burning sensation or irritation in the general area of the patellar tendons in both knees. Only cycling brings this on -- I can run with no problems. I saw an ortho and he though it was patellar tendonitis. I am seeing a PT who is starting to think patello-femoral syndrome (and not tendonitis), which appears to be a technical term for "your knee hurts and we don't exactly know why." I took 5 weeks off from cycling, had a professional fit to the bike, and followed the stretches and exercises prescribed by the PT.
Today I got on the trainer and pedaled for 20 minutes about as easy as I could -- I was basically just going through the motion of cycling. About four hours later the burning sensation started again. The doc and PT are somewhat puzzled by all of this because it is brought on by rather gentle cycling and not things like a 12-mile run. This is quite the opposite of their usual experience with these sorts of problems. I would appreciate any ideas or personal experiences you have that might help us identify and eventually solve my problem.