Comments sure did go in a Boot Direction. Since others focused so much on Danny's re-alignment via boot mods, I think I'll row a different boat and offer a different path of re-alignment: Through movement pattern changes.
Looking carefully at your video I'll suggest you have excellent balancing skills overall - and an easy, athletic flow to your skiing. I don't see a F/A balancing error - I see appropriate compensation
for a Leg-Positioning error
. Good Athleticism Plus Good Balance applied to an Inappropriate Movement Pattern equals a Funky Outcome (mathematically, GA + GB ~~> IMP = FO) .
Is your coach requesting that you "Drive your feet around"..? Perhaps "Drive your outside-foot around/forward"..? Maybe even "Reduce your Tip-Lead"? That's what I'm seeing and I think it's what's causing a multitude of issues requiring compensatory movements that manifest with the appearance
of boot issues. I don't think you need to modify your boots, just modify your technique.
By driving both feet Out, Forward & Around your CM will end up "back and inside" most of the turn. To retain your F/A Balance you'll need to 'lean forward' and compensate for the pelvis being so far behind both feet. At turn finish you'll also have no choice but to make a big Up, Forward & Over movement with your pelvis to achieve a practical crossover because the previous turn ended with your pelvis so far inside & back (exactly what I see in the video).
In the video, each turn starts fine and you seem to be in an appropriate stance overall. As the turn progresses you seem to 'drive' that outside foot forward eliminating nearly all tip-lead. Mechanically, this is putting your outside-foot in front of your CM
and since your inside-foot is also in front of your CM, you must bend forward at the waist to compensate and regain your F/A balance.
Consider the Static Demo where a person takes off their skis and draws an "arc" in the snow with their outside-boot. They then draw the same kind of arc using the inside-boot. In theory, they're showing the path that skis travel in relation to the body/pelvis during an actual turn - but this is False! In real
skiing the skier is also traveling forward
while their feet "arc Out & Around" so their feet actually don't end up in front of them (as in the Demo) and instead cross under their body at the end of the proposed arc. The feet should never end up in front of them as in the Arcing-Boot Demo. BB has some moving Gifs in this video
at 0:07 that show the Figure-Eight pattern our skis really
Your own video demonstrates driving both feet in that Out & Around arc - but that puts your outside-foot continuously in front of your pelvis once the turn starts. This "puts pressure" against the back of your boot cuffs and may be the sensory input you were asked to look for.
If you implement this 'driving' idea then you must (necessarily) compensate by leaning your upper-body forward and downhill, essentially moving your CM forward to get it 'back over' that (now) too-far-forward outside-foot. Since this 'driving' pattern also puts your pelvis quite far inside and back at turn-finish you must make a big lateral Up & Forward move (with your pelvis) to quickly get across your skis into the new turn. You implement this as a relatively smooth (though abrupt) motion showing an excellent sense of re-balancing. But why do something that requires re-balancing for every turn?
Since others have offered experiments to try, I'll do the same.
1) Discard the idea of driving that outside-foot forward and instead implement Independent Leg Steering (ILS), accepting the resulting Tip-Lead.
(I think 'Todo' may have been suggesting something along these lines earlier)Watch this video of pivot slips
paying special attention to the position of the skier's feet in relation to each other. Also pay close attention to the position of each foot in relation to the skier's CM
. Note the foot-lead separation that occurs as each pivot develops. Implement this ILS pattern in your turns and don't worry about tip-lead nor driving the outside-foot forward.
2) Since you'll now have some tip-lead (foot-lead) at turn finish, stand mostly (60%) on that old outside-foot right through transition because it's the only foot under your CM and the one currently providing a solid platform to stand in-balance on. To initiate the new turn, simply tip this old outside-foot (that you're still mostly standing on) toward the new turn making no effort
to 'step uphill' onto the old inside-foot (because it's still a bit in front of you - and doing so will only put you in the back seat) No Fore/Aft 're-balancing' effort is needed.
3) As the new turn begins, use ILS to progressively rotate both legs, guiding both ski tips into the new turn's direction. Use functional tension in your Glutes and Hamstrings to keep that new outside-foot under you as it repositions itself (via ILS) and increasingly becomes your new stance-foot and more weight lands on it. As your feet "change F/A positions", new tip-lead will be created as will appropriate counter for the new turn.
4) By not 'driving' the outside foot/ski forward, that foot will remain in a good place at turn finish (namely, under your CM) so you wont need to lean forward at the waist to be in F/A Balance. Further, you'll be able to progressively
release edge-angles late in the old turn and allow your pelvis to migrate progressively
across your skis. This pattern keeps a skier in continuous
F/A Balance and permits the skier to move progressively into the new turn rather than needing to implement a big Up, Over & Forward re-balancing move.
The reason I don't think your boots are 'too stiff' is that I never see any real effort to flex them and therefore I don't know if they'd flex properly or not. They just might.
I also don't think your boots are 'too upright' because the technique you seem to be implementing drives the feet forward which extends both the knees and ankles - which never really flexes the boot anyway, and also requires that you flex forward at the waist to compensate. I see several frames at turn initiations where you seem to be in an ideal F/A balance position for a brief moment - then you drive your feet forward, opening both knees and ankles.
Look again at the video linked above (again, right here
). This time look at the skiing. Regardless whether Braking or Gliding, both skiers demonstrate ILS and both skiers have that outside-foot under them when they "stand" firmly on it (due to ILS). In no case does either skier "drive the outside-foot forward" to the point that they've opened both knee & ankle and bend forward at the waist.
Just my 2¢, but a good investment I think.