Right, short question Been doing a decent amount of running. Last sunday I went on a LSD run and did hills sprints at the end. It was the end to a long week (well...I trained the next day and so on so not really a end) and had done 2 sets of hill sprints and a hard 4-5 miler the day before the LSD run. I jogged home and started to get some discomfort on the outside of left knee. It wasn't major but walked some of it incase. Next day jogged to gym and it started again but a little worse. The leg back I walked. I've had since last monday off from running, with complete rest friday-monday. Now, it's kinda there still. I'm going to start doing my ass to grass squats again to strenghen the muscles around the area and do some stretching (I current do.....ok, not much lets say), but does anyone have any opinions on what it could be and solutions to fix the problem (because it goes from discomfort to pain). I need to get more swimming and rowing in I think (maybe some cycling too, but I don't like cycling for the lack of effect on the lungs).