Pole Vault Invert Drill to load the pole more, keeping the pole loaded when inverting, and invert faster. *Doing this exercise without stabilizing the shoulders and hips (in line with the cord of the pole) enables the shoulders to collapse backwards as the body rises. That does 3 things: It pushes the shoulders out of the cord of the pole (the spring). It makes it easier to do. It creates a back and forth action: later the vaulter is going to have to wait for the shoulders to get back under the