Bill Hartman 0:03–2:32
I also threw up on Instagram some propulsive strategies, some late propulsive strategies, using an old classic, I think it was Charles Poliquin that probably made it popular at one point, using the Peterson step up and also a low box rear foot elevated step up. So check that out. And then I threw up a Instagram story this week on a bunch of activities that I've been doing to reestablish some eccentric orientation with load. So that's an interesting little twist on that video. So check those out. And let's dive into this week's Q&A. I got a ton of questions. I tried to narrow it down as much as I could. So just remember that askbillhartman at gmail.com. And then put in the subject line, ask Bill Hartman question. So I know that you're really asking me a question and not trying to sell me something. So let's get started with those. So this is TS training systems. Bill, can you give a quick overview about the propulsion phases? Yes, I can. So you didn't ask me an open-ended question. So there's the answer. Kidding, of course. So when we talk about the propulsive phase, let's first of all talk about the difference between load and propulsion. So load is what pre-exists based on gravity, the internal forces that you produce yourself, and then the external forces applied to you based on all the physics that are around you. So if I put a barbell on your back, I've just altered the loading parameters. If I move laterally, I've altered the loading parameters. So those are all those three things combined. The propulsive strategy is what I use against those to produce the desired intent or movement. So when we talk about propulsive phases, we can break these down to make it a little bit simpler into something we would consider an early propulsive phase, sort of a mid or maximal propulsive phase, and then an end propulsion. So at either ends of the propulsive spectrum, we're moving through a compressive internally rotated pronated strategy towards a more supinated. So I land in supination, I move through my propulsive phases as I move to internal rotation, pronation, exhalation. And then at the end of that phase, I resupinate, I move back towards external rotation and inhalation. And so the two ends of the propulsive spectrum kind of look the same, but they're not the same. While one's moving from a more inhaled to an exhaled, the other one's moving from more of an exhaled to an inhaled strategy, They end up looking similar, but the orientation of the pelvis is just slightly different. As we go through the mid propulsive phase, that is where the maximum concentric strategy would be as I move against all of the external forces that are applied to me and the internal forces that I produce. And so, again, if we use gate, we're landing in supination. We'll move towards pronation, which is my propulsive phase. And I will resupinate the foot at end range. So I will have activities and exercises and elements of performance that will emphasize one of these phases or another. So if I can identify where the limiting factor is in performance, I can then select the appropriate activities with the appropriate positions to emphasize each of those propulsive phases. And so we have this endless array of exercises. And once we can identify where these limitations are in our propulsive capabilities, the exercise programs kind of write themselves. And so this is a really huge topic that we cover at the intensive, especially during the practical component, because a lot of people think that there's some sort of standardized exercise progressions when the reality is, is the progression needs to be individualized towards the client or the athlete that we're working with in regards to what do they do well, what do they not do well, and then what is our intent? Are we trying to emphasize something that they're already good at, or are we trying to work on a weakness or a limitation? And so again, as we look at this from the beginning of the propulsion to the end of the propulsion, there's definitely things that we need to emphasize. But just to wrap that up, Remember that early propulsion is moving from an inhaled state towards an exhaled state. The maximum propulsion is where I am maximally pronated through ground contact and I move again towards the inhaled state towards the end and I can again self-select the activities that would be most appropriate for each of those phases. So hopefully that gives you a little taste of what we're talking about and I'd be happy to expand on those if you have a very specific question on that. from looks like kina mac d can you explain eccentric and concentric orientation once again that's yes you got to ask me an open-ended question my friend Is it different than short or long? I don't really care if you use short or long. I just think you need to understand what's really going on. So traditionally, we've talked about eccentric and concentric contractions, and I don't think it's a very good descriptor. And so when I use eccentric or concentric orientation, so orientation makes reference to position. So if I have a muscle that is positioned at length greater than its perceived midline, wherever that may be, and we can use that sort of as our imaginary middle point. If it's positioned eccentrically, then it would be positioned in the long position, and if it's positioned concentrically, the big position is short. The reason I use eccentric and concentric orientation because there's certain properties that are associated with those positions. So if I am concentrically oriented, it is much easier for me to recruit that muscle during activity. If I'm eccentrically oriented, it is much more difficult. So there are properties within the muscle itself in regards to how I sense that position and then how I am able to recruit that muscle that I think makes the eccentric and concentric orientation better descriptors. I also don't particularly like the fact that concentric and eccentric contractions are kind of vague. And so I tend to use an overcoming contraction versus a yielding contraction rather than calling them concentric or eccentric contractions. Because again, I just think it's a better descriptor. So for instance, I could have a muscle that is eccentrically oriented, so it's longer than its midline, and it could be using an overcoming contraction. what someone might recognize as they might actually call that an eccentric contraction, even though the force is going in the opposite direction of the lengthening of the muscle. And so again, I think there's some vagueness to the way we've used those terms in the past. So what I'm trying to do is clarify what's really going on in regards to position, concentric or eccentric orientation, and to contraction with an overcoming contraction or yielding contraction, just because I think they're better descriptors. And maybe I'm wrong. I'm willing to be wrong on that because I'm not a big fan of useless jargon. But again, as we've had discussions at IFAST and through the intensive, these terms have evolved into something that has become a lot more useful. The next question, rather, comes from Tanner Batten. How do you approach rehabbing a core muscle injury or sports hernia? So this brings up an interesting concept. I'm not a big fan of treating by diagnoses. So I don't think it really influences me all that much other than maybe having to provide an element of protection to certain tissues that may actually have a change in their constraint. So we do have an area that may be affected in the lower abdomen or the groin area by its diagnoses. But as far as the treatment goes, I treat the human being in regards to its ability to recapture this spectrum of breathing capabilities, full movement from external rotation to internal rotation. the loading and propulsive strategy. So that's how I look at things from this global perspective. So whether we call it a sports hernia or whether we had a shoulder injury or a toe injury or whatever it may be, that just simply guides me into an element where I might need to protect something, but I wouldn't change my treatment strategy all that much in regards to any specific diagnosis. So I know you're looking for something specific here. As far as what exercises I would do, I have no idea. until I would evaluate this person. Other than, like I said, this might just guide you in an element of protection. So we don't want to negatively influence this by allowing a great deal of discomfort to be associated with the treatment itself.
propulsive strategieseccentric/concentric orientationbreathing capabilitiesexercise prescriptionhip internal/external rotation