Originally Posted by Bode Klammer
Well, he's in the air, so it can't be sk-snow interaction causing that rotation. Maybe there's some aerodynamic forces causing it.
That is such a red herring, I've seen it a few times in relation to that clip (aerodynamics, thick air). That rotation is not caused by the sidecut of the skis, but it has never been postulated that this is the case.
As far as what the primary movements are, Miles B has them defined pretty well. The primary movements I use in my skiing as I see it are:
Rolling the ankles (i.e. tipping the free foot). This controls edging and activates the kinetic chain to align my skeleton for support.
Flexion/extension. The free foot/leg is flexed to support balance on the stance foot. This also pulls the free (inside) foot out of the way of the stance foot to achieve higher edge angles. Additionally, the stance leg is lengthened from transition to the fall line for support. The stance leg is later flexed somewhere after the fall line to remove this base of support and move the center into the next turn.
I would change pulling the free foot back to really be free foot management. You only need to pull it back if it got too far out in front to begin with, but the point here is to keep the hips over the feet.
And frankly, as far as primary goes, thats it. Counter-balancing, or angulation to support balance on the stance (outside) ski is something that supports the other movements. As is counter-acting, the position where the inside hip is slightly advance to provide a stronger position is also a support. You can counter-balance and counter-act, but with lazy free foot tipping, poor flexion/extension, and improper stance ski balance you don't get much out of it.
It's really a pretty simple list. The hard part is getting all the other stuff out that is ingrained habit.
One thing I would also note is that in the beginning the roles of the stance and free foot are clearly defined and seperated. This is to isolate the roles and allow them to be worked on with a clearly defined focus. Stand on the stance foot, let it be passive, and tip/manage the free foot. As the student gains more skill with the movements, the feet can begin to share roles. Drills like the weighted release help to integrate the roles of the feet back together again.
What I have found to probably be the guiding principle of PMTS skiing is the very idea you have in your signature SSH. Let us not create what we can allow.
p.s. As for posting on realskiers, as I've said before, I am not going to take responsibility for the actions of others... so I wouldn't buy you dinner. However, if that were to happen, I would be willing to have you show me this femur rotation carving stuff you've talked about.