Body frame

One marker rig, projected three ways from a single clock. Top-down owns rotation, side owns the vertical mechanics, from behind owns lean, which is edge depth made visible.

shoulder to hip —on the —

That number is the twist. Negative means the shoulders are held back against the hips, which is what stores rotation before a takeoff and stops it on a landing. Positive means rotation is leading the edge: on a Lutz entry, that is how an outside edge becomes an inside one.

The poses are a first draft and have not been checked by a coach. The machinery is sound; the positions are not yet instruction.