As the title suggests...four days after a new setting a new marathon PR, I went out for an easy recovery run of 5K - no problem. Next day was 8K, and this was no problem until the last 400 meters or so when I felt a sharp twinge in my right knee. I continued on for the last few hundred meters, the pain was not as bad as the initial twinge though I could still feel it in my knee. It did not seem to be impact related - in fact, the pain was most noticeable after impact (not upon), and as I was lifting that leg off the ground, and then also as I was flexing the knee to bring my foot up towards my butt.
I could feel it walking around, and it was more noticeable/painful when going down stairs. Again, not on impact, but as I was lifting that leg up (still some pressure on it), and bringing my right foot up towards my butt.
Took a few days off, it healed to a point where I no longer felt it going down stairs or walking. Tried some light running, and it came back within a few minutes. Stopped, and rested for 4 more days. Which brings us to today, where I tried a bit on the treadmill at the gym, and it took a bit longer this time (And I warmed up verrrrryyyyy slowly), but the pain still came back, and pretty strongly. Coming back from the gym this time, I actually had trouble going up stairs as well. Not good. So...
It is difficult to describe the exact location of the pain - I feel some on the front, below the kneecap, and I feel some in the back, right above the top of my calf muscle. A very sharp, twinge-y pain. Now, the most pain I feel, in addition to going down stairs, is if I sit in a chair and just straighten my leg out, from 90 degrees to 180 - mostly I feel this in the front of the knee location.
My first thought was runner's knee (given the front knee, below kneecap location), but given that it isn't occuring on impact but rather after impact and is most aggravated by the lifting motion, it seems unlikely. I should add that I am able to jump without any problems, and I was also able to do several sets of weighted squats at the gym during this time without any pain (lunges however do aggravate the knee).
Given that I can do most of this stuff without discomfort I am hopeful that this won't interfere with skiing. However I'd appreciate any feedback, or any relevant personal experiences with any similar knee problems...thanks!!