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Hiya a few weeks ago I noticed that when I run after about 15 minutes I get a pain on the right side of my left knee (from a looking downward viewpoint) and it feels quite tight aswell like it doesnt want to flex. Basically it gets worse untill it actually hurts when my foot hits the floor. However it only happens when I run cycling, rowing, swimming and cross trainer is all fine so at least i can keep my cv up!
Does anyone have any idea on what it could be or how i could fix it? hopefully want to be back running by week after next.