I began jogging again (had been several years since I had been) in Aug. 2006 and w/in a couple of months noticed that my knees, expecially the left one, were pretty stiff in the mornings. So, I stopped jogging and went with the exercise bike for 20-25 minutes 3X a week and the stiffness never got worse but it remained. The stiffness is definitely localized mostly directly below my kneecaps, but with any type of physical activity the stiffness extends basically all around my knee cap to the top. I saw an ortho MD and he x-rayed my knees and couldn't see anything going on. Basically told me, "sucks gettin old". Trouble is I'm only 33. So, I stopped exercising for the past several months and have only seen a very marginal improvement in the stiffness. I still have full range of motion, there isn't really ever any popping, they've never given out, don't appear swollen, not painful to the touch, and there has never been ANY pain associated with the stiffness. I'm very confused as I thought that arthritis was generally always linked to pain in some way. I tried anti-inflammatory meds for a while and no real change occurred. Recently, I re-visited my ortho MD and he again didn't have much to offer, but gave me a cortisone injection in the left knee. It's been about 5 days and the shot has worked but only marginally. What could this be? Should I get an MRI on both of them? I had Oshgood Schlatters as a kid (which affects the same area of the knee) is this a repurcussion of that? What should I try next???????????