SPEAKER_05 42:24–42:29
So if you get a profile view, you can see the position of the load. So what you have to have is an ideal situation where the mass of the load is positioned so that you have an equal distribution of expansion on either side of the load. There's an equal distribution of expansion on either side of the load. And again, I always default to Lu Jiaxuan because it's easy to see it. He's got a—I think he's at the bottom of a snatch. Yes, he's at the bottom of a snatch—and you can see the shape of the spine so you can see the expansion on one side, the expansion on the other, and then the two compressive strategies in this alternating fashion. So he can hold the mass like an equal distribution of mass and an equal distribution of pressures. If we were looking at profile, we'd say both sides, like the front and the back. And so they're going to try to do the same thing based on their physical structure. And so you're right, you're going to see that if you were to just use a neck representation, you'll see those that would be biased more towards a narrow representation tend to drive a lot more forward head, whereas the Ys will tend to push the thorax forward more, which takes their head backwards and then they end up doing something like that, right? They do like a military posture where they're pulling their chin in. So they're getting the compression here, whereas the narrows will tend to kind of push their head through the window, so to speak.
spinal mechanicsload distributionpostural strategiescompressive strategiesthoracic positioning