Applications for the Intensive 16 are closed. If you've been trying to apply, you've probably noticed this already. We hit our target for a total number of applications very, very quickly. So I had to close it down. Those of you that are still interested in applying, you'll have a chance probably in about a month. We've got to figure out those dates for April, but we'll let you know. If you would like to be notified first, you got to get on the email list, just go to any blog on billhardmanpt.com and at the end of the blog you can put your email in there and you will be notified first next time the applications are open for the intensive. Digging into today's Q&A. This is with Alec. Alec, that's a great question. I'd started off at discussing about the influence of arm bars and it turned into directions of force related to the phases of propulsion. So early is accepting the force, late is obviously producing force. And so we can distinguish the activities using those circumstances. We can build those into activities to emphasize a certain aspect of propulsion. So this is going to be a really good question for a lot of people that are trying to select activities to match the demands and needs of the circumstance. So thank you, Alec. If you would like to participate in a 15-minute consultation, please go to askbillharman at gmail.com, askbillharman at gmail.com, put 15-minute consultation in the subject line, and we will arrange that at our mutual convenience. Everybody have an outstanding Monday, and I will see you tomorrow.

I'm still trying to understand the lateral limb representation from an arm bar perspective. Recently, I've been thinking a lot about arm bars and how we can gain movement options from them. Now I want to know what the equivalent would be for the hip, if that makes sense. I'm trying to figure out how I can have someone start from parallel and then allow motion at the hip to regain either internal or external rotation. I'm not sure if there's something there. I was wondering if I should learn to properly coach and choose a roll and go back to inside lying, or if there's an actual way to perform an arm bar-like movement. I can envision how it could be done in a closed chain environment, where the pelvis is on top of the femur. I would like to see if there's a solution where we can do it the other way around so that gravity is less of an enemy.

Oh, I see what you're saying. Yes, so all you have to do is have, so think about what you're driving, right? In regards, so you're fixing the hand in space. Is that fair? Like it's in space. And then you're, so you're driving the relationship from, so if I'm laying on my side and I'm twisting my arm, right? I'm driving the range of motion from hand to shoulder. Okay. Um, so that hand is fixed in space. So this is, this is the dilemma with calling something open chain versus closed chain, right?

I was wondering how much of a hot topic that was going to be for you. I was wondering if you were going to go a hot chain, right?

If you look at the original definition of closed chain and open chain that the guy's name is Shindler that came up with that concept, it's pretty big. And what he says is when the extremity meets a significant resistance. And so that's what creates the reversibility of the influence. It's like, is it coming from proximal to distal? That would be closed chain, right? If it comes from distal to proximal, that would be open chain.

Okay.

But what is a significant resistance? It's not so much the significant resistance other than the fact that I have to understand what direction the force is going. Anything that promotes an early representation from the foot to the pelvis would be distal to proximal. An armbar is an example. Just because the foot is not on the ground, does that mean the mechanical element is not following that principle? The armbar fixes the hand in space, then promotes the turn. So it's the direction the mechanics are going that's the determining factor. Am I driving this from the center of my body outward? That means starting from the IR representation and reducing it as I move distally, or am I bringing the IR toward me from distal to proximal?

Okay.

Because the arm bar fixes the hand relatively speaking, fixes the hand in space, right? And then you just promote the turn. So it's the direction that the mechanics are going that is the determining factor. Am I driving this from the center of my body outward? Okay. Which is starting from the IR representation and reducing the IR representation as I move distally, or am I bringing the IR towards me from distal to proximal? Okay.

This is flying over my head a little bit here. I understand that the direction is different, but I'm not sure I understand the physics that would draw the line between this ultra proximal or proximal to this.

I can help you. I can help you. This is going to be real simple, crazy simple. You ready?

Wonderful.

Okay. You're standing in place. You jump forward and you land with your left foot out in front of you.

Yeah.

You jump forward and you land with your left foot out in front of you.

Yes.

What direction did the reaction force come from? And where does it go? Does it go from the ground into you or from you into the ground? Which one is greater?

Upon landing, it would be me going down, going into the ground.

Yes, sir.

It would be me going down, going into the ground.

Let me give you another representation: You land on your left foot and it's out in front of your body. Your body continues to move forward and you push off the ground to the next step.

Okay, yeah.

You see the difference? The difference between early and late is the direction that the force is going.

Okay, okay. Now I see it.

Okay. And so that's, so literally what the arm bar is is a representation of that.

Okay.

All right.

Does that make sense?

I think so.

So basically, when I do a supine arm bar, I would be going from early to middle at the shoulder joint. Let's say potentially. And then the sideline equivalent, let's say, would be going from middle to late at the hip.