SPEAKER_00 39:40–42:38
It felt like two minutes. Really, really good questions. Tough questions, actually, and kind of philosophical, but got a lot of great feedback on that, so I hope you can join us next Thursday, 6 a.m. for the Coffee and Coaches Conference call. Now, let's dig into today's Q&A. It's gonna allow us to examine some of our expansion to compression to expansion concepts, and we're gonna do it under the guise of a golf swing. This is a two-parter question. And like I said, we'll review some extra rotation and introvertation concepts. We'll look at the swing. And then we're gonna look at some of the negative secondary consequences of when we don't have this representation of expansion to compression. Because I think a lot of things show up clinically when people either lose their capabilities or they train away some capabilities. So, let's go to Johnny's question. Johnny says, hey Bill, hey Johnny, is hip abduction? And he puts it in quotes. Johnny's really smart. At 90 degrees of traditional hip flexion. Once again, I like the traditional. hip flexion considered ERI. Okay, so is this movement away from midline, interrotation or extra rotation? So let's grab the pelvis and let's take a look at this thing. So when we look at where we are at 90 degrees, so theoretically, if everything's all fine and wonderful, we're going to be starting from this position of interrotation. But we have to consider when we have movement away from midline, when we want to decide what's happening here at the hip, we have to consider the relationship between the femur, the inominate bone, the sacrum, and the lumbar spine because all of them are going to contribute to the position and the movement and so under whatever circumstances this may be occurring I can have a different outcome. So if I start from this position which we would say is traditional hip flexion at 90 degrees degrees, and I'm going to move away. If I have an inominant that is biased towards inhalation, as this moves away from midline, I'm going to see more of an external rotation. But visually, obviously, it's going to move in this straight line, if you will. But the reality is that I'm producing a rotation here at the hip joint. If I am biased towards an inhalation strategy at the pelvis, then what I'm going to see is I'm going to see it turn this way as it moves away from midline, and now I've produced an internal rotation. So, Jami, I think that when you're trying to determine which one it is, you're going to have to look at the context in which it's being applied. And so if I was in a split squat and I see someone to need deviate outward under most circumstances, you're going to show me that's going to be biased towards inhalation. That's going to be an ER kind of a situation. Sometimes as you see people move through that 90 degrees in a deep squat for them to actually achieve the deep squat. What they're doing is they're moving that hip into internal rotation, even as the knees are deviating away from midline. So again, I think you need to pay attention to those relationships.
hip mechanicspelvis movementinhalation strategyexpansion to compression modelgolf swing biomechanics