You can't keep spreading misinformation like this.
Your eyes are deceiving you badly.
Gluteus maximus - Wikipedia
en.wikipedia.org
glute max actions are: external rotation of hip and leg, extension of hip, abduction of hip. These are all the actions you describe as being done by the torso.
Please open a book/surf the web and try to find one muscle of the Torso that moves the pelvis. (Hint: THERE ARE NONE).
Whatever you do please stop saying this "core moves hips" stuff. It is not correct and some people end up reading it and believing it.
Why do you think the majority of hitters are closed at foot down? Why do you see the belly button turn forward before the front hip in every swing? If it was legs-pelvis-core It would be as plain as day.
at launch the belly button goes first pulling the front hip open while the back leg anchors and takes the slack out of the back hip. Once the slack is out, the core pulls the back foot which will get peeled off the ground while the back leg stays anchored/ERed to keep the slack out. The result is posterior pelvic tilt and torso turn against the hips which are being held in line by the legs.
Do you have an example of creating leverage through the back heel ? Or maybe how are you teaching through the back heel ?
I've reviewed this video several times. It seams to me the the BB does not move first. Its clearly the lower half moved first.
View attachment 16906
When the bb first moves that is going first; the front leg is still closed. Maybe you are perception biased? That has happened on more than 1 occasion.
No, Its not perception bias, It's literally what I see on video. Why the need the need for resisting with the upper half, from the lower half in order to take the slack out, it the BB is going first?
It is so obvious in this clip as well. The top is hitting against the bottom. The hips are top of bottom at swing launch.
Call it bias if you want, but even in that clip the BB is not moving first. "Hitting Against the Top of the Botton" Against a fired bottom or a static or closed bottom?