I'd like to figure out the "safety zone" for your knee ligaments when pivoting. (I refer here to pivoting as the femur turning in the hip socket. Applied equally in carved or smeared turns.) Here's a pic SkiDude referenced in an earlier thread where the skier's well outside of the safety zone:
Now some people may be saying "that's because he's a-framing!" But my understanding is that even if both legs matched the angle of his outside leg, he'd still be structurally weak, as that kneecap's getting loaded.
There's a lot of emphasis on coiling these days - i.e. allowing the lower joints to turn while resisting with the upper body, which winds the skier up like a spring. I'm wondering if that turning of the lower joints past a certain point endangers the knees of our athletes.
So for this guy below, when is he in danger? (sorry for the grain--using a video camera.)
Here's the guy neutral.
Tipping onto edges - looks aligned from foot through to hip
Not aligned--turning knees.
Not aligned - outside knee is cockeyed and tipped inside.
Hey, it doesn't look so cockeyed now that the inside knee's matching... but is it actually stable? I actually appear to have moved my hip inside as well... perhaps that's why it looks more stable as well... Also, I know I'm not showing ski school definition of pivoting. I tried walking through a pivoting turn and it looks clunky and stupid--gravity's a b!tch. But I'd like to think we can still explore the danger zone through some of these shots, plus any others that people can contribute.
Is there a simple rule of thumb we can use here? e.g. keep the outside knee out from under the body?