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本帖最后由 checkmoteur 于 2014-12-12 13:42 编辑
闹完了再上点干货，不是C的，而是P的。名目略有差异。P是管这个叫做Leg rotation的。但文中有明确提出，这个动作最早就是一位法国人归纳提炼出来的，称之为braquage，如字翻成英文就是steering的意思——好玩的是到了法语加拿大，却又把英文steering如字翻译回去，成了conduire：
Leg rotation is the most important technique used today to turn the skis, and the preferred technique for most situations is twisting one or both leg in the hips. When instructors talk about "turning your feet," this is what they mean. This technique is used in skiing maneuvers at all levels, from gliding wedge turns to dynamic parallel turns.
Ski instructors and coaches commonly call this technique braquage, a French term introduced by Geroges Joubert that literally means "steering." If you turn both legs at he same time, or if there's weight on both your feet when you twist one leg inward, your upper body will remain motionless, and you can turn your skis without disturbing your balance.
If, on the other hand, you twist only your outside leg inward and lift your inside foot off the snow, your upper body reacts by turning a bit toward the outside. This sets your upper body into a count-red position, ready for hip angulation early in the turn（单脚滑drill甚至javelin练得其实就是这个——查注）. This is a technique racers have used for decades. Rainer Schoenfelder executes such a movement in the fourth and fifth frames of figure 4.14 on page 65. Because his right ski is off the snow, the muscular effort that rotates his left leg inward also causes his upper body to turn slightly toward the outside of the turn.
Leg rotation works well for several reasons. Rotating the leg inward generally rolls the ski on its edge, too, combining the increase of the ski's steering angle with an increase in the edge and platform angles-often a desirable combination. Leg rotation is also powerful. With it a skier can produce large torques , and produce them through an entire turn, much longer than any other rotary technique. Leg rotation also allows you to manipulate your skis with your legs alone, leaving your upper body to balance against whatever forces are acting on you. It imparts no angular momentum to your body as a whole, and because it involves the movement of relatively little body mass, leg rotation does little to disturb your balance and stability.
Leg rotation is one of those key techniques of skiing that is, unfortunately, less than obvious to many self-taught skiers.（我也是下过牛棚，才发现这一点——查注） The intuitive movement for most beginners is to twist the upper body and hips in the direction they want their skis to turn-movements that usually have counterproductive side effects. Turning the leg in the hip to the degree that a good skier turns it isn't an essential movement in many sports, which might be why it doesn't come naturally for many beginning skiers（当我们说日韩的转上身的滑法更适合初学者，而不是北美的steering时，理由就是这个了。总之，转上身近乎本能，下身必须强练——查注）.
A straight leg can't exert as much turning force on the ski as a bent one, especially when it's the outside leg. The interior rotators of the femur, which are used when the leg is extended, aren't nearly as strong in this regard as the adductors, which come into play when the leg is bent. As a result, this technique is most powerful when performed form a flexed, athletic stance（extend外腿，蹬开？风老板或要再思考一下了。我并且很不理解其他人也一再讨论的extend外腿究竟怎么回事——查注）.
配图两张，文中提到的figure 4.14：
另外一张，小弯：
还有Ted Ligety的一张，讲他转腿横搓，“scrub speed”，说的是stivoting吧：
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雷达卡
发表于 2014-12-11 21:01:59
，大侠这一说，我就有糊涂了
，你就是猫
，你会调书包
显身卡
楼主