In order to adjust to your speed and terrain that you are skiing, you need to vary your movements.
The terrain, your speed and the size of the turn are essential in deciding how much you must put on them, in effect, how much you need to work with the skis.
As a general rule:
These examples illustrate that you should not always ski in the same way. In other words, you should adjust your movements to the way you ski, the speed at which you ski and the type of terrain you are skiing in.
You can, for example, allow yourself to stand more upright or relaxed at low speeds, but crouch over a bit and tighten your body and muscles when your speed increases.
It may sound logical that you need to adjust your movements to your surroundings but in our experience, many skiers ski and turn at speeds that are not approproate to either the condition of the snow or the slope.