@Tim Hodgson , thanks. I like to write what my skis feel like to me during the offseason to take some of the edge off my jonesing. Writing what I feel when skiing later in excruciating detail has me basking in the sensations. I know, pathetic, but not necessarily alone. Yes,
@markojp makes an excellent extraction from that post. Anyone can create ground force reaction. Managing it to work for you is a whole other ball game. Keeping that wave of power behind you and your direction is the trick.
When I read discussions about inside leg shortening/lightening, I often see a major split in technical conception between skiers who use/conceive their kinetic chain from the “top down” vs. from the “bottom up” or skiing “from” the hips vs. skiing “from” the feet. Initiating our DIRT at the hips or the feet? Hmmmmm. There is a fine line between having a stable core and being loosey goosey. A good slalom racer has a good representation of riding that fine line of delicate power. We may find that if we place more tension in our feet and ankles that is constantly working against the boot/binding/ski with tipping and fore/aft pressure regulation, we can then let our core relax more so that the hips can more freely/loosely respond to ground force reaction. We want to split or share the tension between our core (CoM) and our feet (BoS). Think: “separate” (separate) but equal. As a matter of fact, like two ballroom dancers, we let the CoM and Bos work “independently” yet in “concert” together. But which dancer do you let lead? The Com (hips) or the BoS (feet)? Now, it is your feet (BoS) that has the skis … right? Would you rather play kinetic chain relay from your hips to your feet/skis or your feet/skis to your hips? How about if you want the ski to do as much of the work as possible? In the sport of skiing, lazy can be powerful.
I often see JF Beaulieu’s quote posted here “tipping happens as a result of inside leg shortening” (or something close enough to that), which I do not think makes sense when the concept is followed through to its final fruition. It sounds like to me that we are choosing our rate and timing of the turn based on how much we shorten and/or lighten the inside leg. Are we really choosing when and how much to turn with inside leg shortening or lightening? Sounds awkward and unwieldy if you ask me. Maybe some skiers are, probably many from what I read, but it does not sound like a very functional way to make a turn to someone like me. For me, the opposite is true - inside leg shortening happens - as a result - of inside tipping, as a geometric output - the more you tip that inside ski, the more ground force reaction (limited on the inside ski from 10 to 30% of total ski pressure) will produce vertical separation that will “push” up on the inside leg. If it is loose and not locked up with static forces of flexion and extension, it will shorten automatically on its own with no effort required to lift that leg yourself. Tip equally and tip high and GFR will “push” your inside leg up effortlessly. And, you will be riding the lion’s share of load to the outside ski that you will be riding across the hill on but with the inside ski engaged, fully bent and ready to take over with a smooth and progressive transfer of power from ski to ski.
Through maintaining high tension in the feet and ankles with tipping and dori/plantar flexion while “relaxing” your legs, hips, abs, spine and shoulders, things will become automated and effortless. You are no longer responsible for much of the work that was once invested with so much physical effort and, instead of running to fly your kite, you can instead sit back and relax like a pilot at his set of controls. Though, if you use no pressure on that inside ski, nothing will happen and you will have to lift and lighten that leg and ski yourself. If that is your goal. As well, if you have too much pressure on the inside ski, at the wrong time, too early or late, you are likely either out of balance or not in complete control of the turn. When the ski itself becomes the primary input into the system of a ski turn, almost all the major movements of the body become outputs. When our upper body movements become outputs rather than inputs, the timing and rates of those movements become inherently accurate. When your major body movements are direct inputs, you are then required to judge the rate, timing, duration and intensity needed for the upcoming turn. Or, maybe you’re judging in advance of the next turn how much to shorten or lighten your leg? Again, hmmmmmm. If you are off with these judgments, especially timing, you will not have the ski pressure when needed. Release the body of the responsibility of that control and limit that upper body control to CoM/BoS relationship management, staying loose and in balance, you will find out how much more work you ski is willing and able to contribute.
Like good swordsmanship, the locus of control (primary kinesthetic focus and kinetic priority) is at the hands and wrist for which the kinetic path of movement through the rest of the body merely supports and responds. The weight, momentum and centrifugal rotation of the sword alone is the power that is wielded. It is not the swing of the arm but the tweak of the wrist that controls the sword's force reaction that will provide the swiftest and cleanest decapitation of your enemy’s head. I mean … let’s be realistic here.