You know I have suggested this to my daughter. She told me I was wrong. I cant wait to show this to her! Thank you
Reminds me of my DD to a tee, exactly our biggest enemies when we began the IR switch last year.
This flaw has zero to do with I/R and more to do with HE instruction.
The issue is as simple this:
In HE instruction the first move coming off the rubber is to TWIST open.
We want to sprint off the rubber (per Java and the other big hitter PC's on here)...if we were running a race, would your first move be to twist and push with your groin? That is exactly what the young lady in the video is doing. This creates that rear leg anchor and glove swim, IMO.
Is this pitcher twisting open and then moving forward or is she moving forward an then opening?
Once you are comfortable that she can throw the ball correctly underhand using I/R and the tape on her ball is spinning with the correct rotation and axis, try just playing catch - underhand. Make her walk through to you after the throw.
I have clinic all day tomorrow and will try and get some video of what I mean...CP