Originally Posted by PR_Glen

which part of the knee? often people mistake a stiff IT band for a knee injury, or even a lower hamstring pull... which can be fixed with some massage work and some isolated stretching... (after you are warmed up! never before!)

best way to correct knee issues is to make sure you are landing on your midfoot, the heel and toes still make contact but the midfoot should land first. Also it helps if you avoid kicking out your legs when you run. Kicking out is what sprinters do and that is fine for that but for distance running you need to switch that up. Easiest way to explain it is to lean forward like a ski jumper.. your legs will naturally fall forward in reflex.. that is your stride.. if you want to speed up lean down further, if you want to slow down lean back.

Hope that helps anyway.