l*******o
发帖数: 669 | 1 Day 3 (theme: counteraction)
During the video analysis on day 2, Jay said both Andrei and I lacked
counteraction (CA) as our upper bodies followed the skis. Well, true, but we
were supposed to focus on CB on day 2, weren’t we? Anyway, CA became the
theme of day 3.
Jay explained to us that CA is used to make better ski edge grip. (I think
it also makes release much easier.) When skis point to one direction, we
counter that move by rotating our upper bodies to the other direction.
Beginners tend to rotate their upper bodies in the same direction of the ski
and ahead of the skis to initiate the turn. They then advance to “
following” where their upper bodies follow the ski by facing the same
direction as the skis. Better skiers keep their upper bodies facing downhill
, this is much better but still not good enough as they are simply “skiing
in and out of counter”, as Jay called it. They hold CA only during the
lower half of the turn after skis pass the fall line. In PMTS, CA must
happen as soon as the ski edges are engaged after the turn transition. That
means for an edge-locked carve turn where ski edges are engaged near the top
of the turn, the upper body will point to the side, or even a bit uphill. (
I think for brushed carve turn where the ski stays flat during top half of
turn and edge engagement does not happen until fall line, having upper body
face downhill is sufficient as far as CA is concerned.)
Drill #1: Have front zipper point to stance ski at all times.
Drill #2: Rotate upper body so that stance side hand is behind bindings,
inside hand near inside ski tip. Stance side arm opens up (as if doing
external rotation in rotator cuff exercise).
Drill #3: Hold counter during turn transition but point upper body to the
other direction (i.e., start the CA for the new turn) as soon as inside foot
tipping starts. At this point torso should face side of the trail. (Jay
said imaging pee toward the side of the trail.) Increase CA as the turn
progresses.
Drill #4: Same as #3 but add CB as well.
Drill #5: Use a hula-hoop to help with CA. Start using it as a facilitator
then as an indicator.
Drill #6: Use a stick as CA indicator and also to help make arms spread
outward and forward and make poles flaring outward.
Drill #7: No-swing pole plant. Make sure there is no forward swing when
doing the pole plant. Either use wrist only or use wrist + lower arm but
definitely do not get upper arm and shoulder involved.
Then Jay showed us the progression toward a two-footed release. It started
with phantom drag where during a traverse, release the downhill ski but keep
the uphill ski on its LTE. Maintain equal weight on both skis. I was
surprised I really struggled with this simple exercise. This is the start of
2-footed release so I know I have been doing this release wrong. I actually
transfer most if not all the weight to the uphill ski before I release,
making it effectively a one-footed release.
Drill #8: Phantom drag.
Drill #9: Use garland to practice phantom drag, release, then re-engage.
Drill #10: Sideslip by flexing stance (downhill) leg to release and getting
LTE of the uphill ski on and off to stop and start the slip. Then have some
forward momentum to practice forward sideslip.
Drill #11: One footed sideslip with downhill ski only.
Drill #12: Same as #10, but add CA.
More problems revealed:
Problem #1: Lose CA near the end of turn due to incorrect pole planting by
forward arm swing.
Problem #2: Unable to do sideslip as described by Jay. My own version of
sideslip does not cut it.
Problem #3: BTE tipping. Do not actively tip to BTE. Always tip the inside
ski to its LTE, combined with CB, the center of mass will be pulled inside,
causing stance ski to be rolled to its BTE. Do not actively engage the leg
muscle of the stance leg to tip to its BTE.
Problem #4: Occasional wedging. Jay explained that there is only one reason
for wedging and there are two ways to fix it. The reason is pushing off the
old stance leg while it has significant weight and is on its BTE. (Both of
which form a base to push off from.) To fix it, either take off the weight
by transferring all weight to the other ski early, or flatten the old stance
ski. The first is the PMTS phantom move which I can do easily (but my
weight transfer is too slow occasionally), the second is two-footed release
which I cannot do correctly yet.
We spent a lot of time doing the video analysis and asking Jay questions. By
the time we were done, it’s already 4:00pm. When I got to the parking lot,
there were a lot of search and rescue people there. I was told there was an
injured climber at Zigzag Canyon that needed help. The S&R operation lasted
throughout most of the night. | B*N
发帖数: 147 | 2 it all starts with realizing we can't do that "trivial" side slip :) |
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