Looking really closely (protractor in hand, LOL) at a bunch of sit spins, it seems to me that the requirement of 90 degerees is not very difficult to attain. In this picture of Plushenko, for instance, he seems to be pretty close to 90 degrees, but he's not "sitting" at all. His buttocks are way higher than his knee (-3 GOE, LOL).Originally Posted by antmanb
In this picture, his behind appears to be almost as low as his (skating) knee.
Here is Todd Eldredge. Nice and low, plus his free leg is not too far off from being parallel to the ice. I don't like his rounded back, however.
Michelle. To me, this is just a beautiful position. Nice back. Her rear is about the same level as her knee. Could be lower, but not without sacrificing some other aspect of the position.
Emily Hughes. I like this one, too. The hand assist allows her both to keep her bottom low and her extended leg straight. (The rounded back can't be helped in this position.)