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firehawk 发表于 2013-4-16 12:08
而且物理上从支持力的变化也可以大概解释。
PS: 学委是雪珂拉,不是我
仔细研究了一下这个概念,在 http://www.youcanski.com/en/instruction/core_concepts.htm找到了相关的定义。原文见后。
其中有个关键词是quickly。结合我自己的体会说说extension。extension相当于快速站高,实际是给板子加压了,因为需要快速蹬地才能实现这个动作。但是当这个动作停止时,整个身体仍然有向上的惯性,会带着板子向上,从而实现减小板压。转弯前做引身就是通过这种方式减小板压。
flexion是个相反的动作,一是可以用于吸收地形,二是carving级别以上用于转弯前释放压力。
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Flexion and extension of the skiing joints, affect pressure. The speed at which you flex and extend can define the amount and duration of pressure on your skis. If you body accelerates downward from a tall position quickly, pressure on the skis temporary decreases.
When the flexing is stopped pressure increases.
Flexion and Extention
If your body accelerates upward from a short position quickly the pressure on the skis temporary increases. As the extension is stopped pressure decreases. If you move in a constant rate the pressure can be the same or can be progressive.
Flexion can also help absorb changes in terrain and snow conditions while maintaining balance, and allow more powerful rotary movements. Flexion can be active (causing the knees to bend) or passive (allowing to push your knees into your body). |
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