Originally Posted by D(C)
songfta, could you please elaborate on your 1st point? You talk about dynamic motion moving your CM from turn to turn. What exactly do you mean?
The point is that you want your CM to take the most efficient line toward the finish. Note that I say "most efficient," rather than "most direct." While in theory, most direct is the ideal way down, it's not always the most effective or efficient for the conditions.
So you want your CM to take that efficient line. In order for this to happen, it's important to reduce the amount of outside interference with this momentum as much as possible.
If you block your body into a position - set hip and shoulder position, angles, etc. - you create a really rigid platform that's susceptible to outside influences. The muscles and skeleton are more "locked" into position, so any ruts, dips, ridges, and the like will be more likely to throw you (and your CM) off-line.
Think of it like a car: if your car didn't have any suspension, you'd soar off of every bump and get rattled by any dip. The same analogy works in skiing, too: you need to be able to absorb the bumps, so you want to avoid being locked into a certain body position.
Not that you want to be too
supple, as that presents other issues.
But human nature in ski courses is to try and stay on line as much as possible. If you get off-line, the panic sets in: muscles tighten, and you get locked into a position that may or may not be ideal for the situation. The goal is to gradually get back on line but allow you CM to find the most efficient line given the situation.
Furthermore, you expend more energy by blocking your body into a position. Yes, the buzzword is to "stack your skeleton," and that's a good ideal. But a lot of people use excessive muscle action to force this stack, to force a so-called "ideal" position. In doing so, a lot of energy is put into the turn - often more than is necessary.
And that leads to the key: be flexible, be adaptable. Every course presents different challenges; our goal as racers is to adapt and perform the best we can.
I hope this clears things up.