There are many ways we can create pressure and conversely many ways to reduce and even eliminate pressure. However if we are going to stay on a slope and stay in control, we do have to deal with pressure.
Here are some ways to make pressure, this doesn't mean they are right or useful.
-extending against the snow or slope, I call this pushing against the slope or surface.
This can be done at any time in an arc, if you do it at the wrong time it can have severe consequences.
If you extend against an edged ski, it will increase pressure dramatically, but it may take you or put you out of balance.
For example, extending the leg in the High C part of the arc. This pushes your Cg downhill or at best diagonally to the direction your skis are traveling. Pushing or extending at this point in an arc, creates instant pressure on your skis, but it also moves you out of balance. Once this movement takes you over the tipping point of balance, you have lost the turn. If your extending in the upper part of the arc has enough effect on the Cg to move it away from the direction of linear momentum, you begin falling inside.
This is what many TTS instructors tell you to do and it's flat out wrong. The upper third of an arc has little centripetal force acting on you; therefore if the outward pulling force is small, you better not exceed it by adding inward pushing. You have to honor the forces working to hold you up. This is done by using your own balancing ability over the ski. We call that CB. If you incline toward the inside and you extend or push against the surface, you have just lost the arc and maybe you are already on the ground. This is where I always have to appeal to people's logic. World Cup Skiers are very gifted with a number of instincts, one is balance and the other is survival. If WC skiers did everything I just described, which many coaches see as a movement WCers use, real WC skiers would not often finish a race. Many coaches try to coach developing skiers with these movements they believe are happening. Unfortunately for these skiers, it’s going to be a long winter and a short career.