Changing Technique
Traditionally construction techniques produced skis with limited torsional strength. The minimal sidecut this permitted resulted in parallel turns of limited radius. Consequently, paralleling and stemming were mixed together depending on the situation. Often turns would be initiated parallel then evolve into stemming to create greater turning power - at the expense of both speed and increased effort.
In the 1990s skis were progressively widened at the tips and tails relative to the waist. Applying an edge of these "shaped" or "parabolic" skis brings a curved surface to the snow, resulting in a carve turn.
Read more about this topic: Parallel Turn
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