For all, please remember there are dozens of posts on this forum about kinetic chain, foot tipping and femur internal rotation; what it does, how it works etc. For further information about this and any topic, the Search feature, above and to the right! it really works!
Here is just one example I fished up from 2010:
Meput:
I have been working on my fore/aft balance this year. My focus has been dorsiflexion of foot/ankle to facilitate forward movement of my CM (initiating the kinetic chain at the foot). Dorsiflexion draws the lower leg forward into the boot tongue, bringing the knee and femur, and pelvis/body forward.
I've heard this approach before, it pops up every few years and I have never found that using doriflexion in the boot, to be an effective way to think about centering. I have heard it used in the PSIA jargon. I cringe every time I hear it and I never see results when it's used. Every top skier I've talked to tells me they never use that idea, including Diana and various other PMTS instructors and racers.
To begin with, it doesn't activate much in the kinetic chain, as that movement has little or no leverage over the top of the boot or to the hip. It doesn't help in pull back efforts for the kinetic chain to operate, because you have to be close to balance or in balance regardless of method. Even lateral ankle movements are worthless for kinetic chain, edge engagement if you are standing or leaning on your inside ski. Therefore being caught in the back seat, and if you are out of balance in a rearward position, the idea that dorisflexion has enough leverage or movement capability to bring your hips back to center is far fetched at best.