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很多是今年在wanaka每天听到的，转的好！谢谢牛！
原文
http://www.skichinese.com/forum. ... 7693&pid=113833
Steering:
the blend of edging and pivoting with the control of the resulting pressure. Steering
allows the skier to choose a variety of turn shapes. Different blends of edging and pivoting allow
the skier to control speed or to maintain speed or accelerate by reducing braking.
Carving: turns with little or no skidding, with the tails of the skis following the tracks made by
the tips
Skidding: the sideways travel of one or both skis across the snow. Necessary for speed control.
PIVOTING
Pivoting and direction change
With the upper body facing the direction of travel, turning the legs in the hip sockets creates a
steering angle. This, combined with ski sidecut, deflects the skier in their arc. Pivoting is seen in
the relationship between the upper and lower body.
Pivoting and balance
The ability to guide the skis on their path without relying on hip or upper body rotation will help
a skier maintain balance by keeping the body over the outside ski. From the hips down there is
less mass than in the torso, so changing direction with the lower body is quicker and lets the
COM move in a smoother trajectory.
Pivoting and edging
Upper/lower body separation enables a skier to balance on their edges through angulation.
Turning the femur in the hip socket allows the hip joint to be more mobile laterally to the inside
of the turn, helping to balance on the edges.
Pivoting and rotation
Turning the hips or the upper body before the legs at any part of the turn is called rotation. At the
top of the arc (phase 2) this could be caused by a rushed weight transfer (timing and pressure
control) or an imbalance from phase 1. Through the bottom of the arc (phase 3 into 1) it may be
caused by poor steering mechanics or a loss of control of angular momentum.
Note: See Biomechanics and skiing: Angular motion, Angular momentum and Planes of balance:
Rotational.
EDGING
Edging and Direction Change
When there is a change of direction, edging is involved. Edging provides the grip that counters
the force of gravity and centrifugal force, keeping the skier turning. The degree of edging is
determined by how fast the skier is going when they turn, and whether they wish to decelerate,
maintain speed or accelerate. Good edge control makes the ski grip but allows maximum
gliding for any given direction change.
Edging and Pressure Control
Turning on an edged ski or skis generates forces that give the skier a sensation of weight, or
pressure. When the skis are flattening (phase 1) they are releasing their grip and the load against
the snow diminishes. When the skis are turned across the line of travel (phase 2, 3) forces build
and the COM gets deflected. Edge angle increases and pressure builds. Bigger forces from higher
speeds and steeper terrain place greater loads on the skier which must be managed.
Inclination and angulation
Inclination refers to the line of lateral balance between the BOS and COM. This degree of lean is
what the skier must do to counteract the forces of the turn, and it changes within each turn in
response to speed, external forces and intended path of travel. Too much lean and the skier stands
on the inside ski or falls over, and not enough makes it impossible to maintain the arc of the turn.
Angulation is the bending of body segments as the skier inclines. Controlled by the use of ankles,
knees and hips, it keeps the skier in balance against the edges and lets the skier produce edge
angles that are greater than what can be achieved with inclination alone.
Turn Initiation – changing the line of inclination
While balanced on an arc, the COM is inclined to the inside of the BOS. To change direction, the
skier must change this line of inclination, putting the COM to the inside of the new arc. A wedge
or stem is a way of placing the BOS to the outside of the new turn, changing the line of
inclination to the new side.
In parallel skiing this “toppling” can be achieved by releasing pressure on the outside ski and/or
transferring it to the other ski. This effectively shifts the BOS from the downhill ski towards the
outside of the new arc, changing the line of inclination. A smooth release in phase 1 is also a way
of getting the COM to the inside of the new arc. Most edge changes involve combinations of
these elements, and can be passive or active, simultaneous (parallel) or sequential (wedge),
depending on the skills and desires of the skier.
Note: See Biomechanics and skiing: Stability, Direction, Impulse, Angular motion and
Momentum, as well as Planes of balance: lateral
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雷达卡
楼主
显身卡
比赛的人一眼看上去全是poc
发表于 2013-12-4 20:37:38
发表于 2013-12-12 01:32:37
