So on a recent tune-up day our course conductor gave me feedback to open and close the ankle more. Good feedback - so my question was when to open and when to close the joint during a turn. Unfortunately I couldn't get a more clear answer than "throughout the turn". So here's my mental model of how the ankle opens/closes during an advanced parallel:
Initiating a turn, we engage the front of the ski by bringing the CoM forward to pressure the ball of the foot. (Closing the ankle)
Through the fall line, ease off through the arch of the foot. (neutral ankle)
At the end of the turn, rolling the ankle uphill, engage the back of the arch. (open ankle)
Is this accurate?
(For discussion purposes: Assume that closing the ankle joint is moving the shin closer to the toes. Opening is moving shin back toward the heels. Let's also assume that as skiing is variable, one doesn't always ski every turn the same way, these adjustments are all subtle rather than gross movements, we want to avoid mechanical skiing, we're maintaining flexibility rather than a locked joint, yadda yadda)