Gaining and regaining Fore/aft Balance
One of the most mis-understood and frankly incorrect and damaging coaching approaches that continues to exist in USSA and in Canada's version of USSA, is how to achieve re-centering. What is constantly being taught and coached is extending and moving the hips forward. Although the idea may portray what you'd like to see, but that is not what is being done, by the best world cup skiers. These two approaches don't portray what is actually happening in world class skiing.
Flexing and retracting the ski and boot from the snow constitutes the release.
Lifting the tip of the ski, creates the correct tension and advantages the kinetic chain with the correct muscles and tension all the way up the body for a "backward" hold or movement of the boots.
Balance change by initiating the lifting and flexing of the previous stance or outside ski is accomplished.
Continuing the retraction and changing edge angles of the lifted ski constitutes the change to the new edges. The new outside ski is weighted and balance is established on the new turning ski.
Inside ski pull back
The inside foot is pulled back creating a lift of the ski tail, or a transition from a back position on the ski to a center weighted ski.