Punchbowl from Setting 3 with the Wingmaster
There are 6 ways you can move your spine. One of them, circumduction, is a circular movement of the spine, either internally or externally. The idea of this exercise is that its an internal circumduction if your spine was twice as long.
With internal circumduction, your spine makes a circle around the mid-line of your body at the level of the solar plexus, with the two ends of your spine staying in the same place. This exercise does the same thing, but the shoulder girdle is what’s making the circle around the mid-line of your body.