Spirals can be performed on four edges: forward or backward, and on the inside or outside edge. Spirals performed on a "flat" (no lean) are generally not counted as "true" spirals. The basic spiral is performed with the free leg stretched and extended to the rear above hip level. Many skaters try to lift the leg as high as possible, but more important than the height of the free leg is that it be fully stretched and that the tension of the position be maintained in the upper body as well.