Bill Hartman 32:02–35:10
It looks like this until it looks like that. So ERIR happening at the same time. So here's the step. Ready? So here's the step. My foot lands, everything starts to get super imposed. And then I hit max P and then they don't move. And then they go back the other way. It's like a collision of ERs and IRs that slam together because at the point of max P, I need the least amount of movement possible. So I have to squeeze. So everything does this. It interdigitates, it squeezes, and then it releases and expands in the other direction. OK. OK. So not quite what I was saying. I understand your representation. The thing you have to understand is that there's certain areas that need to have a much stronger representation of yielding because that's the greater area where I can store and release energy. So where would we look? Well, we start to look at like an Achilles tendon or we start to look at like a Patellar tendon. It's like those are designed for energy storage and release to a greater degree than some of the broader, flatter, shorter, connective tissues. It's not that they don't yield and distribute the force, but think about where they start to distribute the force. The shorter ones, the flatter ones are the ones that are translating this force into stiffer structures. Patellar tendon. Big rubber band Achilles tendon big rubber band the glute max attachment to the ilium tendons really small really broad, why would it do that because it's got to distribute the force into the pelvis. Okay. Which is also expanding and compressing, right? How do you, how do I get this, this big hunk of bone to bend and twist? Well, if I put a little teeny tendon on it, I'll get one little spot that'll, that'll constantly get pulled on ASIS. And it looks like an ASIS. If I, if I attach a bunch of stuff there that pulls on that one spot, it gets pointy, right? But if I'm trying to create this distributed wave of energy that's got to go through this, I need a very broad, small attachment to distribute that into that structure. You see how this interplay is working? It's like some of the stuff is going to lock together, hold a position so nothing moves, so that all the movement goes into the big rubber bands where I store and release more energy. But see, that's why we have problems too. That's why you get patellar tendon pain or you get an Achilles pain. because I'm not distributing the stresses the way I normally should. I'm asking them to do perhaps multiple jobs. Or I'm saying, yeah, I can't create the compression at max P anymore because the position is not allowing that to happen.
energy storage and releasetendon mechanicsconnective tissue stress distributionmaximal force productionmuscle-tendon interaction