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Biomechanical causes of knee pain are probably one of the most commonly cited running
injuries, any way would be to have anterior or front knee pain, pain behind the knee cap
pain around the knee cap area. Essentially, if you think of the knee as a hinge or modified
hinge joint that allows you to rotate through. It has to be stable in both that position
and that position. It is a tension compression matrix, so, the soft tissue holding it and
pulling it against itself in all the different directions. It's translating force that is
created in the hip and in the foot, ok, so as the foot rolls in and out it moves the
tibia as the hip moves in and out it moves the femur. So, if your foot’s rolling in
and your femur is rolling out you get a twist going on at the knee or vice versa. So, they
have to happen in synchronisation with each other the rolling in and out. If they don't
you get the kneecap running up and down out of its grove. Or you get excess load medial
knee pain through there. Also things like weak muscles on the inside of your knee will
mean that the kneecap doesn't run smoothly so you start to get knee pain like that. But,
essentially, from a foot point of view if you pronate too late into the step it rolls
your tibia in while your femur's trying to roll your out. So you end up getting twists
and compressions and rotations there. If it happens too quickly you can get strains down
the illotibial band and into the outside of the knee. If you have a blockage in the function
of your big toe, for instance, you can't bend forward so some people might hyper extend
the knee or bend it too far backwards so it depends on how you're put together as to where
your pain will go.