Why average is not normal
Ida's most explicit treatment of the middle line comes from a Big Sur advanced class in 1973. She had been pressing the students all week on the question of where bodies actually live — not in clean categories of healthy and sick, balanced and unbalanced, but along a continuum. Her training as a research chemist made her impatient with the Aristotelian habit of sorting the world into black and white. Living systems, she insisted, exist as spectra. The practitioner's leverage comes from understanding that bodies can be moved along the spectrum, not flipped from one side to the other. And the direction the practitioner moves them is always the same: from the extremes toward the center. The reason this matters is that the center is the only point on the spectrum that can be specified. Everything else is relative. The center alone is determinable. That is what she meant when she said it is the knowable line.
"Middle line. Now by my definition the middle line is the knowable line. And you have to always remember when you hear me holding forth that when I say normal, I don't mean average. And when I say average, I don't mean normal. The average is probably way out here. Is way out here, it is random. And it is that random situation which you take and order and order and order and more order and order and you more put more order into it and you put it. And the middle is the normal."
Ida, Big Sur 1973, defining the middle line for her advanced class:
The distinction matters because it determines what the practitioner is reaching for. If average were the goal, the work would be statistical — bring everyone to the population mean. But the population mean, in Ida's view, was already a body in trouble. The average American adult, in 1973, was a body whose feet were splayed, whose pelvis was anterior, whose lumbodorsal junction was collapsed. To move someone toward the average would be to move them sideways, not upward. The middle line is something else: it is the line implied by the body's own design — by where the joints actually are, by where the bones actually want to stack, by where gravity can actually flow through. The anatomy book hints at it. So does the experience of the practitioner's hands. But the population doesn't.
The functional line and the mathematical line
One reason the middle line is hard to talk about is that it is not a mathematical line. Ida was clear about this in the seventh-hour transcripts from Boulder 1975, working with Peter and another student who had been trying to locate horizontals in a body that did not yet contain them. The students had been treating the line as if it were a geometric construct — an axis they could measure to. Ida stopped them. The line they were after, she said, was functional, not geometric. The fingers register it. There is a moment when the hands, working along a structure, feel the structure settle into something that says yes, this is it. That recognition is what they were chasing. It is not a number; it is a felt fact about the body.
"Now we are not really talking about mathematical lines here. We are talking about something functional. And you and Peter being the ones that had discovered that functional horizontal there between these two points, know what I'm saying when I say it is not a mathematical line, but it is a something which when you get it between your two fingers says, ah, that's it. There's a something in the feeling of it when it's horizontal that says, ah, that's it."
Ida, Boulder 1975, to a student who had been treating horizontals as geometric:
This is the crux of why the middle line is knowable rather than merely theoretical. A geometric line would be knowable only by measurement, and measurement is exactly what the body resists — it twists, it rotates, it shortens, it deviates from any line you try to lay across it with a ruler. But a functional line is knowable through a different channel: the practitioner's hands, working through the fascial planes, register the moment when the structure aligns. That moment is reproducible. Two practitioners working independently on the same body will find the same line, not because they agreed on coordinates but because the tissue under their hands tells them when the relationship is right. This is what Ida meant by saying the middle line is the knowable line. It is not knowable in the abstract. It is knowable in the hands.
"Mean that's what the I gentleman here that you give him a seven clue as to how to establish it. I don't. I'd like to see it. That's not what you asked me. When you say how do you establish it, say what causes the horizontal. I know you said what determines the horizontal. And what I see, what determines the horizontal is when the tension is relieved, when the structures are in the right place and when the weight distribution is such that you have horizontal hinges then you'll have horizontals all the way up the body and I think that's you're That's the direction of optimum functioning. That's the vertical direction of optimal functioning. Bentley, what do I want?"
From the early-1970s Mystery Tapes, Ida pressing a student to name what determines a horizontal:
Ida's borrowing from the Anglican catechism — outward and visible sign of an inward and spiritual grace — was characteristic of her teaching. She was not religious in any conventional sense, but she had a habit of reaching for whatever vocabulary illuminated the point. What she was after was the asymmetry between the line and what produces the line. The line is not what the practitioner installs in the body. The practitioner installs a configuration of relationships among segments, fascial planes, and weight-bearing structures. When that configuration is right, the line shows up. When the configuration is wrong, no amount of measuring will produce a line, because the line is not what you put there. It is what you see when what you put there is right.
From the periphery toward the center
If the middle line is what the practitioner is aiming at, the question becomes how to approach it. Ida's standard answer was that you work from the periphery inward. Bodies do not arrive in the practitioner's office with their middle lines visible. They arrive with the middle line buried under layers of fascial pulling and heaving. The first hours of the ten-session series work on the surface — the superficial fascia, the outer envelopes, the gross relationships of front to back and side to side. Only after the periphery has been organized does the middle become reachable. This is the structural logic of the recipe in Ida's late-career formulation, and she returned to it repeatedly in the 1976 Boulder advanced class.
"If he did enough, I don't Now know. Where can my common line go? Where can that center line go? Where will be the center for a center line in the body? Will it be on the outside of the body? I mean the lateral sides of the body? No, it's got to be the middle of the body, don't it? So you have to build up toward the middle and not detract from it by taking it apart. Now I'd like every one of you to stand right in place at this moment for a minute. Get yourself comfortable and feel where you are in that body. You don't accept your head as being you. Seal at centerline if you can that Ruth was looking for. And where does it have to run? Now let your weight go over to your outer arches. What happens? You lose your line. It's called you're no longer a unit. You feel it? Anyone want to argue it?"
Ida, 1976 Boulder advanced class, asking the students to find the center line in their own bodies:
What the standing experiment demonstrates is that the middle line is felt as unification. When the weight runs along the inside of the leg — through the inner arch, up the medial structures — the body experiences itself as one piece. When the weight rolls out to the lateral arch, that unity breaks. You are no longer a unit, Ida says. This is the practitioner's diagnostic: a body that does not feel itself as a unit is a body whose middle line has not been established. Conversely, the moment the line establishes itself, the body knows. There is no need to tell the person what has happened — they feel themselves cohere.
"And if he was good enough, he probably would. If he did enough, I don't Now know. Where can my common line go? Where can that center line go? Where will be the center for a center line in the body? Will it be on the outside of the body? I mean the lateral sides of the body? No, it's got to be the middle of the body, don't it?"
Ida, same Boulder 1976 session, on where the middle line must run:
The directional principle — work from outside toward inside, from periphery toward center — is what gives the ten-session recipe its shape. The first hour opens the breath and addresses the most superficial layer. The second hour reaches the legs and back. By the third hour, the practitioner is reaching deeper, looking for the lateral line that establishes the third dimension. Only in the later hours does the work approach the structures closest to the middle line itself — the psoas, the pelvic floor, the lumbodorsal junction. Ida did not present this sequence as inevitable; she said in 1975 that the only reason it was broken into ten was that the body could not absorb that much work in a single session. But the directional logic — outside in, peripheral to central — was, for her, structural rather than incidental.
"Well yesterday someone, I don't know who said it to me, it's Michael Salison's concept of the fascial tube which starts in the cervicals and goes in the second hour when you start working on the ankles you're heading vertically again. Know that each horizontal that you bring out down below reflects itself upward as we saw in Takashi yesterday where he's working on his leg and you can see his rib cage absorbing the change. I mean this, when the tissue is in tension, that's stored energy that you release into the body. And its energy is not a metaphysical something. These molecules are aligned in a particular way. You change their alignment. The change spreads."
From the Boulder 1975 first-hour debrief, on how the work travels vertically from a horizontal release:
This is the mechanism behind the directional logic. The body is not a collection of independent regions but a continuous fascial web under tension. A release at one point — the ankle, the iliac crest, the lateral line — does not stay local. It propagates along the lines of stored tension toward the rest of the structure. This is why the practitioner can approach the middle line through peripheral work without ever directly touching the deep core in the early hours. The change travels through the web. By the time the practitioner reaches the eighth and ninth hours, the body has already been receiving information about the middle line from every direction. The deep work in the late hours is not the first time the middle has been addressed; it is the moment the middle finally becomes reachable.
The center as a place, not a metaphor
Ida resisted any temptation to let the middle line drift into metaphor. The word 'center' had become, by the 1970s, a piece of countercultural vocabulary attached to all sorts of psychological and spiritual constructs. Ida used the word but kept tying it back to anatomy. The center she meant was a physical center — a vertical line running down through the body, registering the alignment of the ankles, knees, hip joints, lumbar vertebrae, shoulders, and ears. She was specific about which structures it passed through and which it did not. The line was knowable in the bones.
"have got a degree of balance in that body now that permits a vertical line to come up through the ankles, through the knees, through the hips, through the bodies of the lumbars, through the shoulders, through the ears. Have you all got this picture of progression? Because this is the message of the morning. This progression that a human being is getting from a wad of stuff that's slopping all over the place to a form, a precise form, which acts as though it were built around the line. You remember the story that I told you earlier about has about Claude Bernard, who in getting his citation for the Legion of Honor said, Gentlemen, a man is a something built around a gut, because he was the guy that studied guts."
Ida, August 1974 IPR lecture, naming the line through the bones:
The Claude Bernard reference is characteristic of how Ida positioned her own work in the history of physiology. Bernard had been the great nineteenth-century figure who established that the body is organized around the digestive tract — the structure that takes in and processes the energy by which all the rest of the tissue lives. Ida's claim was that, however true Bernard's framing might be at the chemical level, it missed the structural level entirely. The body's organization in three-dimensional space is not around the gut. It is around a line. That line is what the practitioner is reaching for. That line is what gravity flows through when the body is well organized. And that line is knowable in exactly the way Bernard's gut was knowable — as an anatomical fact.
"You remember the story that I told you earlier about has about Claude Bernard, who in getting his citation for the Legion of Honor said, Gentlemen, a man is a something built around a gut, because he was the guy that studied guts. But if we ever happen to get a bleach in the monor decoration, we're going to have to say something else. We're going to have to say, gentlemen and ladies, a man is a something that is built around a line. But figure what would happen if he were really built around the line and standing on that relative point of the ankles. And it couldn't be, would be a wholly impractical structure. So he has to be built around a line with breaks in it where he can adjust and get one part of the body balancing the other part of the body. But for balance, you see, you can only have a very slight deviation. You have to have these pieces effectively straight."
Ida, continuing the August 1974 IPR lecture on the line and its junctions:
The architecture Ida is describing here — a line composed of effectively straight segments connected by junctions where adjustment occurs — is a working solution to a problem the early Alexander tradition had only half-solved. F. M. Alexander and his successors had recognized that the body needs to be organized around a vertical, and Mabel Todd and her circle had elaborated the same theme in the dance world. But none of them, in Ida's view, had a clear account of how a real anatomical body could approximate that line without becoming rigid. Her answer was that the line lives in the junctions. The segments are straight enough; the junctions are where balance happens. This is why the lumbodorsal junction occupied so much of her attention in the late teaching — it is the most important and the last to be established.
"Now the few people who succeeded in breaking through that barrier were happy, but they were very few and far between because she was teaching lines. Now you people will be getting into this consideration of lines. Those of you who have been auditors before know what I'm talking about. She was teaching lines, and these people could not get the lines established because of the actual three-dimensional material bodies, barriers that lay in those bodies, prevented the establishment of the lie. And missus Lee's story was that if you got your head up and if you worked with your head up, that those barriers would disappear. But I've seen the boys and girls that did it, and the barriers didn't disappear. I've worked with them when they got through with that, getting those barriers out. Those barriers were right in there, and their spines were still anterior, etcetera, etcetera."
Ida, from the RolfB5 public tape, on the limits of the older teachers of the line:
Ida's acknowledgment of the older traditions is generous but pointed. Alexander, Todd, the body-mind coordination teachers — all of them had recognized that the body needs to be organized around a line, and all of them had tried to teach the line through suggestion, through attention, through verbal cuing. The students sometimes got it and sometimes did not, and when they did not, the older teachers had no recourse. Ida's contribution was to recognize that the obstacle was not in the student's understanding but in the student's tissue. The fascial barriers that prevented the line from forming had to be addressed directly with the hands. Once those barriers were released, the line could establish. Once the line had established, the older teachers' methods could maintain it. The middle line became knowable, in her account, because she added the hands-on work the earlier traditions lacked.
The lumbodorsal junction as the line's keystone
Among the junctions, Ida treated the lumbodorsal — the meeting of the twelfth thoracic vertebra and the first lumbar — as the keystone of the entire vertical structure. Her reasoning was anatomical and physiological at once. Anatomically, it is the junction where the thoracic vertebrae, with their downward-pointing spinous processes, meet the lumbar vertebrae, with their nearly horizontal spinous processes. Physiologically, it is the level at which the innervation for nearly every visceral system passes through. If that junction is collapsed, nothing else in the line can establish itself.
"And you know this, you have seen it, you have seen it through the last month, you have seen how you work on a guy to get enough freedom, take Margery for instance, she still has not got that lumbar dorsal established. And one of the reasons she hasn't is because those ribs are so far down that there cannot be movement between the dorsal and the lumbars until the ribs get raised up. And it's coming. But you see, what I'm trying to say to you is that those five different major junctions of the body can be organised into a unified whole differently, with different speeds, different amounts of attention, different understandings, different efforts. Each one is an independent personality of its own. And in terms of establishing a vertical line around which the man can be built, the lumbo dossal is the most important and is of necessity the last to be established. Now the lumbodorsal, in its final ultimate analysis is a balance, is a different type of balance. Got any light on that? Well, I have a subjective impression from the couple of hours of the dance work that I just had in this class."
Ida, August 1974 IPR lecture, on which junction is the keystone of the line:
What Ida is describing here is a sequencing constraint built into the body's architecture. You cannot establish the line at the lumbodorsal junction first, because the structures around it — the ribs, the spinal erectors, the psoas, the quadratus — have to be in working relationship before the junction itself can settle. So the recipe approaches the lumbodorsal indirectly, through hour after hour of work on the surrounding structures, until finally the junction has enough room to align. This is why a student called Margery in 1974 had not yet developed her lumbodorsal — the ribs were still pulling down on the thoracic spine, and until they came up, the junction could not differentiate. The middle line cannot be installed in pieces; it has to be allowed to assemble itself once the surrounding tissue permits.
"Let's not worry about it this morning. But I hope that from what I've been stressing about the middle, this core structure, I hope you're beginning to understand that you can get this different idea of a body as a something centered going out instead of something contained in the skin with some cubbyholes in it. Because I do not think that the very essential understanding of the different role of human beings is going to come out until somebody does some heavy thinking about how this thing can be a center of something that is reaching out in every direction through the fascial planes. Okay. If I can just make one more point, one concept of the old fascial thing that we've not really given much thought to is that there is also fascial coverings of all the organs. The kidneys, the intestines and so forth. All of which continuous with this kind of fascia that I'm talking about in the muscles."
Ida, August 1974 IPR lecture, on the lumbodorsal as the center of the body's outward energy:
The reframing — body as outward-radiating system rather than as bounded container — was Ida's late attempt to give the middle line a physiological as well as a structural significance. If the lumbodorsal is the seat of the body's autonomic innervation, and if the body's fascial planes radiate outward from that center, then the middle line is not merely a balance axis. It is the line along which the body's organizing energy distributes itself. A body whose middle line is collapsed is a body whose distribution is impaired — visceral function, postural function, and what Ida sometimes called energy phenomena all depend on the same structural fact. This is one place where Ida's chemistry training surfaces in the teaching: she thinks of the body as a system whose function follows its arrangement, and the arrangement is organized around a line.
Building the middle line in the lower body
In the fourth and fifth hours of the recipe, the practitioner begins to build the middle line in the lower body. This is delicate work because the middle line of the legs runs through territory the practitioner has, in the earlier hours, been actively moving tissue away from. The work of the first three hours is largely about lateralization — getting tissue to spread and lengthen. But in the fourth hour, the work shifts: the practitioner is now establishing a midline, and in some cases this means bringing tissue toward the center rather than away from it. Ida warned the 1975 Boulder advanced class that this shift catches practitioners by surprise.
"It's going right up the front of the spine and that's where you see the shortness, is through that whole aspect of the body inside. Okay. What then what you wanna do is start creating that midline and start moving things, you know, that way. That's the way the tissue wants to go. And that's where what happens to tissue is it spreads laterally. Did you conceive of moving the tissue toward the midline? At this point? Right, I could conceive of it, but I'm not sure that, I mean, I think I've looked, I see that as an exception. When I worked on Roxanne, part of the work on her lower leg from here down was moving tissue to the midline."
Ida, Boulder 1975, on the fourth-hour shift toward the medial midline:
The midline runs through the body's deep core — not just along the medial line of the legs, but up through the adductors, into the pelvic floor, along the front of the lumbar spine. Establishing it requires the practitioner to think differently about what their hands are doing. In the first hours, the hands have been moving tissue laterally, opening space. In the fourth and fifth hours, the hands begin to organize tissue around a line — sometimes by lifting, sometimes by drawing the medial structures into alignment with the bones beneath. The shift is subtle but consequential, and Ida observed that practitioners who never made the shift spent years working bodies that opened beautifully on the outside but never developed a real middle.
"I can't I I I I have Have you ever seen a a young child be it particularly little girls of eight to 13 being robbed? No. And the midline literally looks like a piece of cooked spaghetti. There is no midline there. It just isn't. And you can't tell how to put it in, except you take that dunk on recipe book and you keep working at And all of a sudden you have a midline and then you can work along the midline. I see it as really important to develop an understanding and the rationale behind the recipe. It's like a Well, did anybody say you wouldn't want to? Well, no. Nobody said so. But sometimes people go out of here with only the recipe and not really knowing why."
Ida, Boulder 1975, on the third hour as the first establishment of the lateral midline:
The image of cooked spaghetti where a midline should be is characteristic of Ida's classroom vocabulary — vivid, anatomically grounded, and refusing to romanticize what the practitioner is looking at. A body without a midline is not a body with a hidden midline waiting to be discovered. It is a body in which the lateral structures have not yet organized into anything that could be called a line. The third hour begins to install one. Each subsequent hour adds to it. By the seventh and eighth hours, the midline runs along the medial leg, up through the adductors, into the pelvic floor, along the front of the spine. The middle line is not a single thing the practitioner finds at the end of the work. It is the cumulative result of every move that organizes tissue around the body's central axis.
"They're shortened through their medial axis. Yeah, it couldn't be drawn up or down. Yeah. And if that begins to let go and if that's a more powerful experience than some of the other work that's been done. Yeah. Okay, still be nice if you could, I mean you got off into this emotional stuff and everything up in here, could you talk for a minute about the center line along the center of the legs here? And that midline goes all the way through but I haven't heard enough of what Ida was talking about in the lineup, tended to start from the ramus and go up. Uh-huh. Well, it would be make a caricature, it would be as if people who were bow legged became straight legged."
Ida, 1976 Boulder advanced class, pulling the discussion of midline back to the lineup:
Ida's caution about the word 'core' was characteristic. By 1976 she had heard the term used loosely in every adjacent field — therapeutic, spiritual, athletic — and she did not want her practitioners drifting into vocabulary they could not specify. The midline she could specify. It runs along the medial aspect of the legs, through the adductors, up the front of the spine. It can be seen in a lineup; it can be felt under the hands. The 'core' could mean almost anything. So she pulled the discussion back, again and again, to the structural fact: where does the midline run, and what does it look like when it is present? The midline is knowable. The core was a word she was not yet sure could carry the weight.
The line and the practitioner's mechanism
If the middle line is what the practitioner is aiming at, and if it is established through the body's segments and junctions rather than installed as a rigid axis, the question becomes how to grasp the line in the hands. Ida's answer was that the line lives at the meeting of the deep front and the deep back. The psoas in the front and the rhomboids in the back are not, anatomically, paired structures — but in terms of the line, they are. They are the two points through which the practitioner can reach the line consciously.
"I'm bringing out and you see the thing that's unique about this is that one of those groups is on one side of the spine, the rhomboids are on the back of the spine and the psoas is in the front of the spine. This is a unique junction, no other junction is like this. Both also relate to girdles. Yeah, it relates to girdles but after all of a sudden you can't have your girdles just flapping around in the grooves. I also feel that when those two points come into proper relationship Hold on a minute, when those two areas, areas come to improper relationship, you also feel, you don't feel that one is on the back and one is on the front, you feel like No, we are on top of each it's all part of the spinal structure. Right, it doesn't really feel inside and outside of itself."
Ida, August 1974 IPR lecture, on the unique junction of psoas and rhomboid:
The pairing of psoas and rhomboid is one of those Ida insights that sounds eccentric at first hearing and then turns out to be structurally obvious. The two muscle groups do not look alike anatomically — one is anterior to the spine, the other posterior; one is in the abdomen, the other in the upper back. But functionally they are paired. Both attach to spinal structures. Both govern the relationship between a girdle and the spine. And together they determine whether the shoulder girdle can sit over the pelvic girdle along a vertical line. Ida's instruction to her advanced students was that the practitioner can reach the rhomboid from the outside and the psoas from the inside — using it, she said, as a hinge — and bring the two into balance against each other. When that balance happens, the line is there.
"But you see I was trying to say, you can get a hold of the rhomboids on the outside and draw them down. But you can also get a hold of the psoas on the inside by using it as that hinge that we've been working with for the last long time. So that both of these are under conscious control. Now some of you are either have or are going to be going after false gods and running down to see what they do with this biofeedback thing. And they'll tell you, they will not know that this is part of that mechanism and you can get a hold of it consciously, providing you've had wealthy. You see, they wander all over the map trying to get this chain in conscious control, but there it is. Now look again at this and realize how strange this is that that whole rhomboid section, but particularly the lowest part of it, can be drawn down to balance against the psoas and thereby you get a vertical line. You see, you've gone the whole trip round."
Ida, continuing the August 1974 IPR lecture on conscious control of the line:
The dismissal of biofeedback is characteristic. By the mid-1970s, biofeedback machines were being marketed as devices that could give people conscious access to autonomic processes — heart rate, brain wave patterns, muscle tone. Ida's objection was not to the goal but to the method. Her view was that conscious access to the body's deep structures was a real possibility, but the path to it ran through structural integration, not through instruments. Once the recipe had organized the body around its line, the deep structures became reachable in a way they had not been before. The biofeedback approach, in her account, tried to install the result without doing the structural work. The mechanism for conscious control of the line was anatomical, and the anatomical work had to come first.
The line as the map of the work
Beyond its specific structural function, the middle line served Ida as a kind of organizing map for everything the practitioner does. She was explicit about this in a passage from one of her public-tape lectures: the line situation, she said, is the map that directs the entire activity of the work. Whatever the practitioner is doing in any given session — opening fascia, lengthening tissue, releasing a junction — the larger question is whether the move is bringing the body closer to or further from the line. The line is not a destination so much as a compass.
"As you might imagine, in fact, you were working with that a little bit this morning when you were looking at this whole thing. Because you see that line situation really is the map which directs your entire activity in this work. You are making it possible. You are doing the changes or establishing the changes which make possible for the human being to be built around and to operate around this set of lines which determine the three-dimensional space that we live in. And as you get that body oriented into those three-dimensional lines, you have this gold point which we've been for which we've been reaching out. Now you have to remember that you never get a closed end goal. There is no such thing in a living biological system as a closed end goal. Soon as you get sunset somewhere, something else starts happening. Some other adjustment starts occurring. Some other change comes."
Ida, from the RolfA6 public tape, on the line as the practitioner's map:
The image of the line as a map is more than a teaching metaphor. It captures something specific about how Ida thought the work should be done. Without a line as the organizing reference, the practitioner can do an enormous amount of competent local work — opening this fascial layer, releasing that adhesion — without any of it adding up. Each move makes sense locally and contributes nothing to the whole. With the line as the reference, every local move can be judged against the larger question of whether it serves the body's organization around its vertical. Ida's repeated complaint about practitioners in the mid-1970s was that they could take a body apart but could not put it together. The missing piece, in her account, was almost always the line — the absence of an organizing reference against which to judge each move.
"So at the relation of the pelvic floor to something which you can't measure like a gravitational field is what is going to determine the entire well-being of that individual. Now realize what determines where the pelvic floor is. It's not those half dozen muscles which we named the other day as being the pelvic floor. Not at all. It's the sacroiliac articulation. It's the articulation between the fifth lumbar and the sacrum. It's the articulation between the fourth lumbar and the fifth lumbar. See what I'm telling you? Just as soon as you shift any of those lumbars back on any of those lumbars, you're going to get a different relationship in that pelvic floor."
Ida, from the RolfB4 public tape, on the pelvic floor and the line:
The pelvic floor is the foundation on which the middle line stands. If the pelvic floor is tilted, twisted, or rotated, no work elsewhere in the body can install a vertical that will hold. This is why Ida pursued the pelvic floor with such consistency in the late teaching, and why she became progressively more specific about which articulations govern its position. The sacroiliac, the fifth lumbar to sacrum, the fourth to fifth lumbar — these are the joints whose configuration determines whether the pelvic floor sits horizontal. The middle line is knowable, but it is knowable only on top of a pelvic floor that has itself been brought into horizontal relationship with gravity. The two cannot be separated. The line and its foundation are the same fact, looked at from two angles.
"No, I don't think. We are dealing, we, Rolfers, are dealing with that which we have crudely called weight. This has been what it has been about. This has been the route through which we have made the change. If you doubt it, feel what it feels like, how weightless you feel as you get older. We have been dealing in that department. That's all I feel confident to say. But anyway, if you will meditate on that definition of Rolfing for quite a while, I think you will get a much better feeling about what it is you're trying to do in your in your actual process. Now, I have a few slides here if you want to see them."
Ida, 1976 Boulder advanced class, on the line and the body's weight:
Ida's insistence on 'weight blocks' as the right vocabulary was, again, a defense of specificity. The line is about how the body's segments stack against gravity. Physiology — digestion, circulation, innervation — runs continuously through all the segments and therefore cannot be the basis for thinking about the line. Weight is what each block has of its own, and weight is what gravity acts on. The line, in this account, is the axis along which the weight of one block can be supported by the weight of the block beneath. Strip away the weight, and the line becomes a geometric abstraction. Keep the weight in the picture, and the line is exactly what it is: the configuration along which a body's mass can rest against the earth without disorganization.
The line and the spectrum
The middle line returns Ida to her opening theme: average is not normal. Most bodies live at the extremes of the spectrum. The work of Structural Integration is to move them toward the center. But because the center is the only point on the spectrum that can be specified, the work has a direction it can be honestly described as moving in. This is the structural meaning of Ida's claim that the practice is not a treatment in the medical sense — it does not cure conditions or address symptoms. It moves bodies along a spectrum toward a knowable line. That is the entire claim.
"We're into the defining structural integration and what the first hour is about, sort of warming them up. By golly, by and by, we all know what that first hour is. Definition or take it from the definition. Well, right. Take it from the definition then. Go ahead. So we have a process Right. Called structural integration. The purpose of which is to realign these different block segments so that they enjoy a harmonious relationship with gravity. In other words, they are arranged horizontally and vertically along these along the so they are properly arranged along the horizontal and vertical lines. So they're blocked stacked. And we begin the process I objected last week, and I still object Right. To getting this consideration. You say the goal is to house on the pelvis. It's true."
Ida, Boulder 1975, on normal as an individual norm rather than a population average:
The distinction between average and normal — and the corresponding distinction between random and normal — is what gives the middle line its philosophical seriousness. If normal were a population mean, the line would be statistical and the work would be a form of averaging. But the line is structural. Each body has a configuration that its own anatomy implies, and that configuration is the body's normal. The practitioner's job is not to flatten everyone into the same shape but to bring each body toward its own knowable line. The line is knowable because anatomy is knowable; the line is individual because each body's anatomy is its own. This is what Ida meant by saying the line is the knowable line — not knowable as a universal constant, but knowable as a specific fact about each particular body.
"I'm not going to be going to address something general before I go into Mark. Theoretically of establishing a vertical line, it's a necessity and the key of a vertical line is dependent upon the horizontal position of the pelvis, which means that the anterior superior spine is on a horizontal level with the posterior superior spine. The anterior superior spine is on a vertical line with ramus for the pubis. Now, the pelvis is in this. This, in turn, reflects the effect of the way the spinal column on the sacrum, which reflects the curves and reflects the body on the upper. Now, with Mark, there were certain areas that were seen, Doctor. Rolfe went into these specific areas."
Ida, early-1970s class, on the line as horizontalization of the pelvis:
The pelvis horizontal, the line vertical: this is the formula on which the entire ten-session sequence rests. Every hour in the recipe is, in some sense, a move toward horizontalization of the pelvis. The first hour begins to free the thorax so the pelvis can move. The second adds support from below. The third addresses the lateral line. The fourth and fifth reach the medial midline. By the time the practitioner is working in the eighth, ninth, and tenth hours, the pelvis is being asked to settle into horizontal balance — and when it does, the vertical line becomes possible. The middle line is the knowable line because the horizontal pelvis is the knowable foundation. Both are structural facts the practitioner can read in the body, and both come into focus only as the work proceeds.
Coda: the line and the silent level
There is one more layer to the middle line in Ida's teaching, and it has to do with how knowledge of the line is transmitted between practitioners. Ida used to talk about two levels of communication — the verbal level, where ideas are conveyed in words and symbols, and what she called the silent level, where understanding is conveyed in the hands. The middle line, in her account, ultimately lives at the silent level. It can be taught with words, but the words do not contain it. The hands have to find it for themselves.
"you people were the first time that this idea came to you, and all these people are just as confused. They may know that rolfing is a good thing, but they don't know why rolfing is a good thing. And they can't go home and spread the gospel when they haven't got any words that constitutes the gospel because people communicate with each other only through symbols, through words, through drawings, through symbols. So you've gotta dish out on two levels. Your significant work on that silent level is very important. But in terms of a gospel, you have to get off that silent level and into a level of abstraction, into a level of symbols. And then after you've gotten their legs and their feet their feet and their legs up to their knees, and I didn't say their hips."
Ida, Boulder 1975, on the two levels of teaching about the line:
This is the final paradox of the middle line. Ida called it the knowable line, but its knowability is not the knowability of a fact in a textbook. It is the knowability of a configuration the trained hand registers. The verbal teaching is real and necessary — Ida spent thousands of hours of recorded class time on it, and the transcripts in this archive are the residue of that work. But the verbal teaching points toward something that lives in the silent level. The hands have to learn to feel it. When they do, the line is there: not as a geometric abstraction, not as a population average, not as a metaphor for psychological wholeness, but as a felt fact about a particular body. That is what Ida meant by the knowable line. Knowable in the hands, knowable through the work, knowable as the axis around which a body can finally rest against the earth.
See also: See also: Ida Rolf and student in the 1975 Boulder advanced class discussing the tensegrity model and the gravity line as a starting point for thinking about the body's organization — a useful pointer for readers interested in how the line connects to broader biomechanical frameworks. B3T11SA ▸
See also: See also: Ida Rolf, Big Sur 1973, on the body as an aggregate of segments and the role of joints in deviation from the central line — relevant for readers tracing the segmental architecture that makes the line both straight and adjustable. SUR7307 ▸
See also: See also: Ida Rolf in the early-1970s Mystery Tapes recordings, working a student named Mark through the establishment of the vertical line via horizontalization of the pelvis — a worked example of the principle named in the article's penultimate section. IPRVital1 ▸
See also: See also: Ida Rolf, 1974 Healing Arts lecture (CFHA_01), defining Structural Integration as the organization of the body so that it is substantially balanced around a vertical line — a foundational statement of the gravity-vertical that underlies the middle line. CFHA_01 ▸
See also: See also: Ida Rolf, Boulder 1975 first-hour debrief (T1SB), on the first hour as the beginning of the tenth, the continuation principle that governs how each session moves the pelvis closer to horizontal — relevant for readers tracing the line's emergence across the ten-session arc. T1SB ▸