Rock-Back

Replaced. Rock-back is the traditional name for the athlete rotating up into an inverted position after takeoff. It describes the same part of the vault as the pull-through inversion, but names it as a position rather than as a continuous action.

The term carries a final position built into it. You rock back to somewhere, and then you have arrived — which means something else has to follow. That switch is the problem, and it costs three things.

It occupies attention. Deciding that one action has finished and another should begin is a decision the athlete has to make while inverted, and the neural switch is not free.

It costs time. The interval from leaving the ground to releasing the pole runs between roughly 1.10 and 1.55 seconds. Milliseconds spent switching are milliseconds in which no energy is entering the system.

And it introduces complexity. The timing and position at which the next action should start becomes something the athlete must get right, which is one more thing requiring standardization — and gray areas cannot be standardized.

None of this depends on the movement being performed badly. The cost is in the conception.

What the model uses instead. The pull-through inversion, which is continuous and has no position to arrive at, so nothing follows it and no switch is required.