I'm a student and don't have time or money to see a physiotherapist. I'm surprised that there isn't more threads about knee injuries on here. I recently moved and my new commutning distance was about 11 km instead of 7. I was mountain biking about once a week and starting to run as well. Something went funny in my knee. At first the little bit of pain didn't bother me I figured it was muscle soreness and i could stretch it out etc.. but it persisted and my knee started clicking when I was walking and I got some sharp pains in the knee under strain when pedalling. I stopped imediately and investigated via the net and came to the conclusion I needed to take time off to let it heal and do some light exercises in the mean time like leg extensions, squats, calf raises etc... well I'm not good at being strict so the exercises wern't consistent. It's been feeling good lately but I did my first commute this morning (11km) and my knee is a little sore and the muscles tense. Obviously I'm in no better shape than a month ago. This must be some overuse injury. what could it be and what do you recommend. I'm sure lots of people reading in the training section have had knee injuries or know of other who have. I'm frustrated, please enlighten me.