- Joined
- Dec 21, 2015
- Posts
- 4,123
Josh,
He does a whole bit on it in his blogspot.
http://harbskisysems.blogspot.com/
Scroll down to around January 14th (just below the video of him skiing on new knees).. There's photos and discussion. There maybe a video somewhere as well (he does post a ton of videos after all)-someone closer to this material can probably steer you in the right direction.
From the same HH Blog that @Superbman referenced, is a HH explains his thinking of the benefit of tip-lifting for his students. To some extent, one needs to be familiar with the PMTS dictionary and the concepts of flexing to release, counter balance and counter acting and tipping the new inside ski through out the finishing of the turn.
Tip ski lift at the release!
I have never been anti-tip lift, I always saw, or noted that I had it in my skiing, I even wrote about it in 2007.
I started using tip lift for intermediates when I saw too much focus on just lift the back of the ski. Which accomplishes little. I began by telling students the point of lifting was to get a release, but most were not tipping after they lifted the ski. The whole idea of lifting is to get that ski to the LTE.
So I began to tell our students to keep the ski level rather than just lifting the tail. In doing the exercise of keeping the ski level, from a stationary rehearsal, I had them compare the difference in the actions of the leg muscles, between just lifting the tail and lifting the tip.
It became obvious even in a stationary exercise for this comparison, that lifting the tip keeps the ski closer to the ground and it also engaged important hip and torso muscles that helped set up CA and CB, which lifting the tail did not. I began to have the group use just lifting the tip at the release. Low and behold, most of their extension went away, and inside ski lead was reduced. Better overall balance and transfer increased. SO I stayed with it.
Biomechanically speaking, the action helps to close the ankle, or Dorsi-flexes the foot, lifts the foot. The tibialis anterior, is the main lifting muscle used to lift the foot, which also helps to invert the foot. In turn, higher in the kinetic chain it engages the hip flexor, (tensor fascia latæ), You can also use it at Starbuck to order a special Lattee, it really confuses the hell out of them.
I 100 percent agree with harb on the inside tip lift during the edge change and why it happens. I also ties into the infinity move concept so beautifully outlined by @Bob Barnes. I am not so sold on the idea of inside tip lift in the apex and just before the edge change of a turn. but I can see how it accomplish the ideas of inside leg flexing and pull back in basically one fails swoop while at the same time taking balance of that new inside ski. Its honestly such good stuff, and is extremely observable in drills like "up and overs' and "one footed skiing" In one footed skiing when you go from little toe edge to big toe edge its feel much more natural to let the lifted ski go tip up, and then gradually go tip down though the turn though the finish, though the first half of the LTE edge turn. I have been doing it that way for years and have even observed current national team members skiing one footed like that in person.
I would go so far to say that with some amount of the COM go slightly aft at edge change, you all but promise to have either a rotary push off, or stem move during the edge change/ float phase of the turn.