Okay, I had one of those yesterday.

So I had a power lifter who was benching with his left foot out right. When he racked the bar, he would rack it on his left side. The bar was set left right, and he didn't move. I mean, he's close to a record, so it doesn't look like he's one-sided when he's actually benching—it's just that he racks on the left side. His leg was out. We were talking about his deadlift, and he was telling his coach that he got an impingement on his right side when he did a sumo deadlift. So, hip impingement on the right side. I tested him. I did a little bit of a 'chessboard' assessment—he's wide, obviously, but it was obvious to me he was wide. I just put him down on the floor and he had a negative internal rotation (IR) on his right leg. I had never seen that. He also had excessive external rotation (ER). His left side had the opposite: a little bit of IR, maybe three to five degrees, I'd say, and then ER was about 40 degrees. So, this looked very different from one side to the other. I was trying to figure out whether to do a right to left sled drag or a left to right sled drag. But I wanted him to go with right to left sled drag with his right hand. I put the sled on the hand because he's a power lifter, and I figured I might as well keep the thorax sticking in the middle.

Yeah, well, it's just that this is where I'm, that's how I ended up on my Ruby.

If you see some people with certain neurologic disorders where they lack control of muscle behavior, they would be ataxic. You'll see a lot of shaky motions because there's so much muscle tension that connective tissues don't behave as they normally would. So when we see these graceful flowing type activities, like dance or athletic performance, the reason those movements are so smooth is because the connective tissues are in this constant state of yielding and overcoming to ensure energy is distributed in a way that allows that motion to appear as such. If muscles try to do that, they don't have the level of coordination to smooth out movements. It would be a miserable existence if we relied on muscle behavior alone to produce movement—it would be horrible.

Yeah. Because that's what they're doing when they reproduce a pain in many cases.

Right. Just try to put yourself in different experiences.

We have to bend space-time in the right direction.

And these are probably the people where they lie on the side and they turn and their knee just like pulls up with them.

If you're going to do prone, I was thinking more like the gym stuff, like a wider stance squat.

That's what the tapes for.

I could dig it.

OK, which would be external rotation and internal rotation. Okay. Is it normal relative motion internal rotation? No. Absolutely not. Okay. So this is going to describe your Ober's test. Okay. So if she is limping into the ground, so she is side bending, right? That was what visually that's what people would describe this. It's actually a turn inward, right? We know that. Okay. So she's eye-ranging through her axial skeleton to create a downward force on the inside part of her foot, because if she doesn't do that, it hurts her knee. Correct? Or her leg, probably. So it's very uncomfortable right now for her to produce that force. So she creates an artificial internal rotation to get the downward force. So she uses body mass to push down. That's what a limp is. But it's going to alter the orientation. OK? So if I was a wide ISA individual, would I have a very steep helical angle or a more oblique helical angle?

All right.

So your field test may be the KPI that gives you all the information you need, depending on where you are in the programming. That's why you do those things. Tomorrow morning at 6 AM, we'll have our Coffee and Coaches conference call as usual. These calls have been great—we're closing in on 100 straight calls. Today's Q&A is with Alex, focusing on the delay strategy during propulsive activities, specifically walking and pelvic representation. We'll discuss lower extremity mechanics, ER and IR representation at max P, force distribution, and superposition. When stepping forward, the sacrum moves back on the ilium during early propulsion (delay strategy). As the center of gravity advances, the sacrum orientation changes—from a counter-nutated representation to a nutated representation as more force is applied into the ground. The delay remains on the support leg side as long as the foot is on the ground to allow the other side to advance.

So the orient to stop that further descent.

So think about this for a second, Nat. So if you had a narrow ISA individual that was in a late propulsive strategy, do you think they would have normal external rotation at the hip? No. No. OK, so my dead giveaway for anti-orientation is the loss of external rotation at the hip joint because that's what happens when the pelvis is anteriorly oriented. You understand that, right? Yeah. So there you go. So again, it's like, when people see the visual representation of that pelvis moving forward in the narrow ISA, they go, oh, it's now tilting backwards. It's like, no, I just kept pushing the pelvis forward.

So you could technically draw multiple representations from different angles and then place the helices on top of it. This allows you to identify the spaces within which you have available without the capacity to move those helical angles. The goal is to be able to move the helical angles to allow more movement to be available. Yes. So you're drawing a fixed representation of starting conditions. Do you understand that? Yes. That's why when we talk about ISAs and such, I don't care about what that angle is. What I care about is whether it is capable of moving, because that represents my ability to reorient those little lines that you drew on your paper so I can access different spaces.

Okay. Different world.

Speaking of interference, I know I've had one case: a horse riding person. She's as well. So she's 21 years old and has been horse riding for like a decade now. The first thing I thought when I heard this was that it could be a huge interference of progress for solving this problem. Correct?

Yup.

So it goes spine, rib space, then the scapula is going to get dragged with it. Don't push the scapula back because you're going to block the turn. It's going to push you forward.

Yeah.

You're welcome. Actually, you'd be capturing an IRD position. So the bottom of your split squat might look a little different. Good morning. Happy Friday. I have no coffee in hand and it is perfect. All right. So, busy Friday as usual going to dig straight into today's Q&A, which is a question from Zach. So Zach is working with post-op knee patients. They're training the anterior outlet, trying to recapture some concentric orientation. So this question took us in a lot of different directions. We covered a lot of grounds. We talked about visual KPIs in the gym, rather than putting people down on the table and doing direct measures of joint ranges of motion. How can we use another activity that would require some representation of internal rotation and use that as our KPI and use that for comparison purposes? We talked about the influence of range of motion. So how deep into a squat clean do you need to go to make sure that you're capturing the pelvic outlet position? What is the influence of the magnitude of load? What is the influence of the rate of load? So we covered a lot of ground here. We talked about some examples of some oscillatory impulses that you could probably use to help to restore and recapture this concentric orientation, how to develop the overcoming influence as well. So like I said, covered a lot of ground here. This is actually a great question from Zach. So very, very appreciative Zach. So thank you. Um, everybody have an outstanding weekend. The podcast will be up on Sunday as usual, and I'll see you next week.

Just staying on your feet in that case. Yeah. Okay. Okay. So just like manipulating the foot contacts. Got it.

That's a baby. That's a small one, yeah.

Makes sense.

So a punch is not a throw. The difference is in velocity, but the mechanics are very similar. What you have is a point where you're applying maximum force into the ground, which would be maximum pronation, max IR. If I was throwing a straight right hand as a punch, there's a quick drop of the center of gravity into IR. I need to create it literally like a jolt into the ground into IR, which propagates internal rotation up the system. You can actually see this if you watch a punch in slow motion and observe the musculature. For a straight right, it's like taking a step forward with the left foot. I'm pushing late into the lead foot. The lead foot hits the ground, creating maximum propulsion that stops the forward momentum. That drives the internal rotation up. The arm is still back. The internal rotation comes up toward the shoulder, creating a differential between the arm and the trunk. The trunk goes first, the arm stays back, like pulling a rubber band back. This creates yielding in the shoulder—a differential between the axial skeleton and the arm. As the internal rotation propagates down the arm, that's what pushes. I have an ER that leads, creating expansion, followed by the IR force behind it. That's why in training they say to punch through the surface of a heavy bag. I want that internal rotation wave to propagate through the entire fist. If I pull my punch, I'm stopping the IR wave and dampening it as it approaches the hand, stopping at the surface.

So, you want to know how close to get them to middle? Basically, it's like, do I need to take them way back into an early or is it on the early side of middle?

It is. But what I'm saying is it's like, so think about where you are in that representation of left side lying, right propulsion. That's peak IR representation. So unless you only have 20 available to you for the rest of your life, because of your structure. Maybe that is all you have. I don't know. I'm not working with you. I'm not saying that's not my point. It's like that would represent like the peak moment of IR. Because you're on the website. Yes, because I'm pushing the right sacral base forward to square to the front. Square to the front is going to be... Make the pulse. It's going to be make the pulse. And so you should see peak IR show up. If it doesn't, like I said, it's not a bad thing. It just tells you, it's like, oh, I still have an orientation going on here. That's why I didn't pick up more IR. So when you're pushing into the wall with your right foot, you're orienting your whole pelvis. Like you hit a point where you've maxed out your IR and then the remainder of that activity becomes orientation. So I would look at, bring yourself back more on the right and then look at the position that you're in in that right propulsive strategy. So my guess is, here you go, you get your foot too high on the wall.

Yes. Yeah. Absolutely you can. But you got to, you have to understand it's like, okay, how long am I doing it for? Am I, am I trying to create a situation where I'm storing and releasing energy? Or am I just trying to create a buffer to end range of motion, which would be something that might be useful in a static stretching kind of a situation.