The power diagonal crunch combines with the diagonal crunch to become the soccer kick. This same motion of the lower body makes up exactly 50% of the walking and running cycle. You can learn to perform this motion very quickly via the drills that follow.
The first motion of the power diagonal crunch is of the front hip.
Front Hip
This drill starts just before the arabesque/stride ends. The key for almost everyone is to start pulling back with the front hip while the front leg is still pointed.