Pre-rotated and under-rotated jumps in figure skating are a much discussed topic.
“If it is very clear that the rotation is done on the ice before the take-off, the jump is downgraded and evaluated using the scale of values for the jump of one rotation less,” Adolfsen explained. “The position of the toe pick/skating blade on the take-off is considered here, not the body position as some may believe. The position of the blade where the toe pick hits the ice is considered to assess whether the jump is under-rotated or not.”
“We cannot see the jumps in slow motion, otherwise there will soon be many jumps to be considered and may be downgraded,” she continued. “Again, there are small margins, and here it has been decided that it must be visible in normal speed to consider whether the jump is pre-rotated or not. The rule for pre-rotations is not as strict as for landing of jumps as it is physically impossible to not have any pre-rotation.”
The position of the blade where the toe pick hits the ice is considered to assess whether the jump is under-rotated or not.
はっきりと、アンダーロテの判断をするのはと書いていますよ。
〉If it is very clear that the rotation is done on the
ice before the take-off, the jump is downgraded and evaluated using the scale of values for the jump of one rotation less