KuoiGuaBoarder 发表于 2014-12-19 21:05
哥再帮你扯一哈啊，除了师弟灵，硬生生踩弯也是可行的
老周 发表于 2014-12-19 22:49
Steering本来就是用来控制turn shape的技术，加和不加完全看想怎么滑，没有一个竞技运动员会傻到非要用纯ca ...
Steering is a blend of twisting the foot and tipping the foot. Less tipping and more twisting leads you toward the pivoting end of spectrum, while more tipping and less twisting leads your toward the opposite end of this spectrum which is carving. A lack of twisting and dominant amount of edging will more or less produce carving. A minimal amount of edging and maximum amount of twisting will produce pure pivoting where there is no change in direction of the skier. Everything in between can be classified as "steering", where there is some blend of the two actions.
Ideally, the twisting input will place the axis underfoot rather than toward the tips or tails of the skis. This implies the ski tips go down the hill and the tails the opposite direction. The difference between excessive skidding and functional steering is skidding generally demonstrates the tails being displaced laterally much more than the tips and is very much a braking maneuver. Steering on the other hand keeps the skis on a curving arc yet creates a steering angle where the tips are inside the path of the feet on the snow and the tails are outside the path of the feet on the snow. The skier can change the skill blend anywhere along this spectrum to create a greater or lessor steering angle to the direction of travel. As stated earlier the more twisting and less edging the greater the steering angle and the less twisting and more edging the less steering angle. A true carved turn has minimal to no steering angle present. The tip, waist, and tail pass through the same point on the snow in a carved turn.
Therefore, most turns are steered to some degree.
老周 发表于 2014-12-21 21:53
图文并茂，中英（法）结合，太棒了。
请假大侠，能不能解释一下“turning the upper leg（femur） inside ...
checkmoteur 发表于 2014-12-21 10:49
综上，再看这位爷：
IntoTheWind 发表于 2014-12-22 22:09
人自己强调了无数次了, 人不是在转腿, 你非得说人在转腿.
转腿过了Apex就转到底了, 当然再也不能多转了.
...
I think everybody is distracted by this apparent lack of steering in his teachings - and this is not really an issue here...
I believe the "phantom move" is this gimmick.
Diverging inside ski on a outside edge pushed against FLAT stance ski using boot pressure as a lever provides STEERING.
Paradoxically for this to work well no OTHER steering should be interfering - so Harb is adamant about leaving stance ski alone during "phantom move" - no (OTHER) steering, no (other) edging until it develop itself during the turn.
In all fairness I believe the (first) book do not require boots "glued" through the whole turn (you can see that on his pics) - once carved turn starts with no additional steering required the free ski is coming down to what looks like a natural stance and then during the transition phase the whole "edge/boot steering" thing ("phantom move") starts again...
(Although in a short radius turns where steering is desired for a better part of the turn this "boot" steering is recommended to continue through the turn I believe...)
So steering IS happenning - everybody who tried his method knows that - it just he advocates this particular (if somewhat contrived) way to do that - and the way he teaches it - "phantom move" INSTEAD of steering - confuses the heck out of everybody... "Phantom move" IS the way to steer in his book.
Advantage here is that with his method it is difficult to start skidded turn and it forces the student to quickly develop carved turn through patient entrance and gradually increasing edging. That's what he sells and it works.
But I feel one-legged balance act is a disadvantage in advanced skiing situation...
So, I think it's not an all-encompassing way to ski - but just an instruction technique for quick intro to carved parallel turns...
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. 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.
checkmoteur 发表于 2014-12-23 17:06
个人是非常讨厌做所谓scientific analysis的，在体育领域。但既然扯到这儿了，不妨按那个逻辑走下。
HH用h ...
bullpower 发表于 2014-12-23 17:55
除了膜拜，还有个问题，马达兄敲这么一篇论文从构思，立题开始，带截图，截视频，需要多长时间 ...
The result of this is that people think that PMTS has no rotation component to it. The reality is the strongest bio-mechanical way to apply twisting torque to the outside leg is with the phantom move.
The little dark secret that some people in the PMTS camp ignore but Rusty Guy has observed is that this move creates rotary torque in the other leg. This means you can use it for hop turns, bumps, etc. You can also over do this move and create a very skidded non-carved turn. (Rusty's observation of some skiers he is calling PMTS). This shouldn't be a secret because there is nothing wrong with this. Match this controllable rotation to what the skis are doing and you carve, go to the other extreme and you hockey stop.
In doing the phantom move, you start with your skis parallel. You tip the inside foot. If your hips are relaxed and not in a co-contracted state you will feel absolutly nothing happen on your other leg. However, if you apply a little, and just a little of that co-contracted feeling to your hip-rotators so that you have told your hips and rotators maintain position, when you tip that inside foot you'll almost feel your other foot tear the rotational torque is so strong. The only way to relieve the pressure is to let that leg and foot tip also or rotate.
Whenever a PMTS skier using the phantom move is tipping the inside foot and in an o-frame so there is a momentary differential of angles of the shins (bowlegged a tad) while maintaining some hip-rotator tension, they are going to be creating rotational torque on the other leg. Once the legs are aligned again then you have no rotational torque on the outside leg.
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