Bill Hartman 6:28–9:33
Where again you're going to have a situation where you're going to increase the compressive strategy of the patella against the femur. Under normal circumstances there is a higher pressure of the patella against the femur. The question is whether it's distributed enough that it's no longer symptomatic. So if you look at the patellofemoral pain research, they always talk about how, oh, the pressure of the patella increases as you go into a deep squat. It's like, well, yeah, it's supposed to, but it's usually very well distributed. But if you have a situation where you've got this rotation across the knee, now you have a focal load. That, number one, so to think about this, if you squeeze the blood out of a patella, it hurts. You get an ischemic response in the patella itself. So people come in, they say, oh, my knee feels cold. Or they feel, again, the focal loading strategy. If you've got any imaging, you'll see histories where the cartilage will start to thin in certain areas on the posterior patella. But the thing that I would encourage you to do is to try to give him enough relative motion so he can capture these positions and learn how to distribute load versus making it focal with the understanding that it's probably not going to be a normal situation. And again, when you're working with superheroes, it's not normal. You don't want normal because normal people don't run fast and jump high. And so you get to know this person over time by collecting data, you intervene to the best of your abilities, and then you monitor these things. But I would say that typically you're looking at some mechanical issues that may predispose some of this load to become more focal. And if you can distribute those, then that's great. You sent me some pictures of the hip internal rotation measures. So be aware as to where those measurements are taking place, okay? So if you do a prone hip internal rotation measurement, what is the position of the hip under those circumstances? So if you've got a pelvis that is anteriorly oriented on the table, I can guarantee you that you've got an orientation into external rotation as you're taking that measurement. It would be much like watching someone squat and having to move their knees apart and toe out. Okay, so they're capturing a position of external rotation space so they can move into that. And then they produce internal rotation from there. So if you're measuring under a similar circumstance, take that into consideration as to where you are capturing that internal rotation measure. Because if it's not in line with the axial skeleton as would be a standard measure, then you need to be as consistent as possible with how you're measuring so you know when you're making a favorable or an unfavorable change.
patellofemoral mechanicsload distributionfocal vs. diffuse pressurehip internal rotation measurementknee rotation mechanics