quote:Originally posted by swingbuilder:
You have to understand that the hips resist rotation. They are trying NOT to turn.
The rear leg drive (or knee as you have been told) is what turns the hips and NOT the hips.
The first thing to learn is that the hips do not rotate the hips.
When the hips rotate the hips it pulls the rear leg along which removes any chance for there to be a "driving back knee"
How critical are you asking? As critical as the heart is to living is how critical the driving back knee is to hitting and adjustability.
PMM, you'd do well to read and understand this. However, it's not JUST the hips, IMO. The pelvis is resisting as well. There's a bind in the hip socket. It keeps getting tighter.
The above isn't a great video for showing it, but notice how Posey's torso is pulling back causing his leg to turn the pelvis open.