In the good old days we would have strengthen the VMO. I know that Charles Poliquin is still a big proponent of strengthen the VMO when he sees a valgus collaspe. To me I can see no sense to this line of thought. How could a muscle that attaches on the femur control the femur?
Thank God for Gray Cook. Gray told us that the body has a system of stabilizers and primer movers. In Janda's work and in Chaitows writtings they would call the stabilizers postural muscles and the prime movers phasic muscles. Different terms same thought process.
Gray went on to tell us that when a stabilizer is not firing right (not when it is not strong) that a prime mover will take up the slack and try to do two jobs at once. So now you have a prime mover that thinks it is also a stabilizer. This can lead to a montrol control issue that shows up as a lack of flexibility. This has also be termed stiffness by some.
So how does this all link back to the TFL & ITB giving you knee pain? Again in the good old days we would have told this person with a hypertonic of stiff TFL to try and stretch it. In essence we were banging our heads against the wall. If we just restore the reflexive ability of the glute medius to stabilize the glute medius, the stiffness in the TFL would magically start to decease.
How can we train the glute medius to do its proper (functional if you like) role. For everyone who knows Grays stuff you know the answer. Reactive Neuromuscular Technique (RNT). For those of you who do not know what RNT is, dont worry. I will put a video up next week of a few RNT techniques that I use.
PS. Another thing to look for with valgus collaspe is excessive foot pronation. Look at the peroneus muscle group for trigger points. Just something else to consider.