CaCO3Girl posted:Bulldog 19 posted:Your son's knee valgus movement (knees collapsing in) is caused by a weakness of the hip abductor muscles (of which there are quite a few). Most notably the two muscles you want to focus on are the glute medius and the glute maximus. Both of these muscles play a huge role in knee pain and biomechanics in adolescent athletes.
While I believe you, and will look into those areas, I have a naive question. I am interpreting this to mean my son has weak butt muscles, is that right? What I don't get is how a catcher who sits in the squat position a LOT can have weak butt muscles. Common sense would say that the catcher has the best butt muscles on the team...why the disconnect from common sense?
No. You can have strong glutes (butt), yet the hip flexor's & hamstring tightness might not enable you to activate your glutes (butt). It's all push/pull forged with growth...
This is why a lot of motivated athletes pursue yoga to prevent tightness & anything locking them up (i.e., hip flexor tightness impeding glute activation) ...