The Bill Hartman Podcast for The 16% - Season 15 - Number 1 Podcast
All right. How? OK, so I'm going to twist this. I'm turning it this way. OK, I'm going to keep turning it this way. Hang on. Is it a bend? Yes. OK, so I take all of the relative motion out of the towel. I twist it as hard as I can. All right, you ready? And then I twist it harder and it bends. That's what you're seeing in his back. Okay. Now, do you see my hand change its orientation? As I twist it, you see my hand move. You see it? See that? And I changed the orientation of my hand relative to the towel. No. The towel bent and it changes the orientation of my pelvis. So it looks like my pelvis changed direction. It looks like my hand changed direction. Not pelvis. I'm thinking about this squat guy. Okay. Do you see that I have not changed my relative position of my hand to the spine, but the spine bent. And so it looks like my hand moved up like that. It's just following the bend. It's like, if I do that, there's, there's the orientation of my hand, but there's the bend in the spine. You see it?
spinal movementbiomechanicstowel demonstrationpelvis orientationrelative motion