skijim13 wrote: I told them that I make turns now without adding rotary movement, they all told me it is impossible to turn with turning your legs. I actually showed a long time friend in the ski school your video and he said every turn made was using rotary, he could not see the truth.
If your skis turn, your feet and legs must follow. There is rotation that happens in PMTS turns, it is just that it is a side-effect of movements that start with the feet (inversion/eversion). Plus, we use counter-acting movements to limit effects of rotation. That is the critical difference that many instructors either don't understand or don't recognize. They just see rotation and think we're all doing the same thing. But we are not.
The canonical TTS steering drill is to stand in your boots and scrub an hourglass pattern in the snow, which is accomplished by twisting your feet. However, to actually do that, you have to recruit gross muscles in the knees and hips which are more difficult to control. In addition, because these movements are so imprecise, they are often disruptive to balance (and this drill actually encourages weighting of both feet). Finally, twisting movements do not produce edging directly; rather you get it as a side-effect and it happens late, after the ski is already skidding. This makes it far more difficult to accurately control the ski.
PMTS tipping is exactly the opposite. We use inversion and eversion of the foot which produces edging directly and rotation as a side-effect. The muscles of the feet and the ankle allow us to use fine motor skills to make these movements, so we can do them with considerable precision. Additionally, by starting with fine movements of the feet, we are able to build balance into our skiing (particularly one-footed balance and weighting) and we get the benefits of the kinectic chain, whereby other movements like counter-balancing begin to happen automatically. Finally, the movements of inversion/eversion produce edging immediately. If they are done properly, ski grip and control may be accessed immediately. With PMTS movements, the *only* time we are not accessing ski performance is the brief period of time where the ski is flat, or neutral, during transition.
When talking about PMTS with TTS folks, it may be more useful to discuss differences in movement and their consequences, rather than getting too hung up on the rotation debate. I think that there is a common misunderstanding among TTS instructors that somehow PMTS claims that it is possible to ski without rotation. That is not the case. We simply say, "if you want to become a better skier, stop twisting your feet!"