it looks that most posters on this thread has picked up an injury of some sorts, including me. just goes to show how demanding running is on the joints, ligaments and muscles. on a bike you just sit locked in and move legs in one plain - very little to go wrong once the fit is sorted. when running, every step needs to be micro adjusted, due to irregularities of pavement, cornering; also, the stride and associated impact is different at different speeds.
i thought six weeks of mainly gentle running would be enough to get used to new stresses, but once i started structured training and intervals i've got an aching left knee - i believe it's a pulled sartorius muscle or some ligament on the inner side of the knee. when i go out, first kilometer is a bit "ooh!.. ahh!..", but then the pain mostly goes away once warmed up. so i'm keeping an eye on it.
take it easy, our bodies are quite good at healing themselves.
