You are such a pot stirrer today.
My comments in red.
No. I am not joking at all.
OK then. You are implying that to ski bumps - as you understand my description - one needs the hip flexor and ab strength to lift the knees on one of these chairs. Maybe, if one is skiing the zipper line fast in competition. Those skiers do lift their knees up high in front of them, and their feet definitely are not behind their hips when they do -not anywhere close. But such strength is not needed if one is simply rec skiing bumps. My advice was directed not to an expert bump skier seeking better zip line speed, but cautious recreational bump skiers wanting to improve in the bumps who sometimes finds themselves in the back seat.
Then you're simply
not keeping the feet behind the hips - or at least you haven't verified that your stated instructions are even doable:
You're saying you think I'm not keeping my feet behind my hips when skiing bumps (not zipper line) because of how I used that chair back in the day? This doesn't make sense. You must mean something else.
And by the way, I said "they feel like they are behind your hips." I intentionally chose to use the word "feel." For bump skiers who sometimes find themselves in the back seat, doing what I suggested will result in feeling like the feet are behind the hips. That's a good direction to go in. The feet may not actually be behind the hips, but the effort of pulling them back while dorsiflexing to keep the heel seated in the boot will certainly feel different, and when embedded in muscle memory it should eliminate the back seat problems of missing turns and gaining speed in the bumps.
^Not meaningful. Not useful. Not even likely to achieve the stated result
unless it's practiced
withoutclosing the hip. I.E.
without actually sinking low. Zero hip closure for (however much) knee and ankle closure.
Seems useful and meaningful to me. Sinking low as I meant it requires flexing at the hip to bring the knees forward, flexing at the knees to bring the feet back, and flexing at the ankle to keep the heel seated, while keeping torso upright. Maybe you are envisioning feet waaay behind the hips. Not what I was going for.
My vision (close enough):
View attachment 183218
Your vision with open hips and feet way back (?):
View attachment 183219
@markojp asked why sink low.
Why? To set oneself up to extend into the troughs as your feet pass through them. I prefer to stay low and extend feet outward and down as the turn hits the low points in the bumps, rather than to stay tall and flex to absorb the high points in the bumps. Both work. Conceptual models are important, but success can come from conceptual models that are quite different from each other.
That's great but it does nothing to bring skis back under you. If the center of your foot is the mounting point of the ski, it is still in front of your COM.
Bring the skis back up under you? Of course the knee raise chair exercises don't help with that. You bring the skis back up under you after you extend. I didn't talk about that because it unnecessarily complicated things. And I never said knee raises were a model for recreational bump skiing. I just answered your question as directly and simply as I could.
OK. *shrug* But this kind of strength is required for the description to have the effect claimed - and it is *not* intuitive.
I know it isn't intuitive. It took me years to stumble upon this way to start a bump run. There are other ways. I offered mine. How about you offer yours?
OK. Except no one in this thread does them in moguls either, so why bring them up?
Hmm. Right, I don't know why I brought that up. Wrong thread.