This page presents the recorded teaching of Dr. Ida P. Rolf (1896–1979), founder of Structural Integration, in her own words. "Rolfing®" and "Rolfer®" are registered trademarks of the Dr. Ida Rolf Institute. This archive is independently maintained for educational purposes and is not affiliated with the Dr. Ida Rolf Institute.

Ida Rolf in Her Own Words · Topics

Ida Rolf on Feldenkrais and the ovoid body

The ovoid body is Ida's claim that a working human trunk must be wider side-to-side than it is front-to-back — egg-shaped, not round. The doctrine arrives in her teaching through a story about Moshe Feldenkrais, the Israeli physicist and judo master who came to her in England in 1958 demanding the work in twelve days because that was all the money he had brought from Israel. Feldenkrais was, by Ida's account, the second most expert judo practitioner in the Western world, and his body showed it: he was round, barrel-chested, thick through the anterior-posterior axis. To Ida, that roundness was not strength but symptom. From the encounter she drew a structural principle she taught for the rest of her career — that bodies are made to be ovoid, that the lateral axis must exceed the antero-posterior axis in the thorax, abdomen, and pelvis, and that wherever roundness appears, symptoms follow. This article reconstructs the story, the doctrine she drew from it, and the larger structural argument it served.

Feldenkrais in England, 1958

The encounter Ida recounts took place in England in 1958 — early in her own teaching career, well before the Esalen years that would put Structural Integration on the cultural map. Moshe Feldenkrais was then in his fifties, an Israeli physicist trained in judo who had begun developing his own movement method. He and Ida were close in age and would each, over the next two decades, build distinct schools of somatic work. The meeting Ida describes is not flattering to either of them in the ordinary sense — it is a hard bargain between two strong-willed practitioners, with Feldenkrais demanding the full series compressed into twelve days because that was all the money he had brought from Israel, and Ida refusing, then yielding. What makes the story matter for her later teaching is not the negotiation but what she saw when she got her hands on him: a man whose body had been shaped by world-class judo practice into something she would come to call the round body, with symptoms attached.

"He saw me get a demonstration, and he came to me and he said, I have got to have this work. He's a he's a huge bear of a man. He is the second most expert judo practitioner in the world. The first is a Japanese prince who I've not met. So he was round like that and tall like that and thick like this. And he said, I've gotta have this work. I said, alright. Tell me some more. He said, you're doing what I always wanted to do. Tell me some more."

Ida tells the story to her advanced students, describing the day Feldenkrais came to her after watching a demonstration.

This is the founding scene of the ovoid doctrine — the encounter that gave Ida her exemplar of the round body and what it cost.1

The bargain Ida struck was structural integration on a deadline. Twelve days, all the money he had from Israel, take it or leave it. She took it. What she emphasizes in the retelling is not the work she did but the kind of body she was working on — a body whose entire shape had been organized around the requirements of judo, where rotational strength and a low center of gravity matter more than the upright easy verticality Ida was trying to evoke. The work itself, she says, went well; she and Thelma Price had a wonderful time. But the case became the case she would refer back to for the rest of her career when she wanted to teach what roundness costs.

Round bodies always have symptoms

From Feldenkrais's case Ida generalized a structural rule. Wherever you see a round body — a body whose antero-posterior dimension equals or exceeds its lateral dimension — you will find symptoms. She is careful, in the classroom passages, not to specify which symptoms must appear. Asthma, emphysema, breathing pathologies of various kinds; sometimes other things. The point is not the symptom but the relationship: the roundness is not separate from the pathology, it is the structural condition of the pathology. The body has been organized in a way that does not give the viscera the lateral space they need, that does not allow the diaphragm to drop and lift along its proper geometry, that does not permit the rib cage to articulate as it must.

"Now here was this man, the most expert judo guy in the Western world. And as a result of his judo, his body was completely round. And I have told you, not all of you come to think of it, that when you get these round bodies they always have symptoms. And that as quickly as you release that roundness of body, the symptom disappears."

Drawing the doctrine out of the case, Ida states the rule she will repeat for the rest of her teaching.

Here Ida moves from the single case of Feldenkrais to the general claim — round bodies always have symptoms, and releasing the roundness releases the symptom.2

Note what the claim is doing. It is not saying that round bodies are unhealthy in some general sense, or that round people are less fit. Feldenkrais was extraordinarily strong, fast, capable. The claim is more specific: that the body's optimal working geometry has a lateral axis greater than its antero-posterior axis, and that wherever a body departs from that geometry, the departure shows up as symptom. The structural condition and the symptomatic complaint are two faces of the same fact. This is the move Ida makes again and again across her teaching — refusing the separation between structure and symptom that conventional medicine relies on.

"The symptom may be the way they breathe, and it may be that they have asthma, it may be that they have emphysema, but always they have symptoms because bodies are made to be round. They are made to be ovoid. They are made to have the axis, the lateral axis has got to be greater than the anterior posterior axis for a body to work. And this is true in the abdomen, it's true in the chest, and it's true in the pelvis. And the body is an ovoid thing, not around it."

She names the geometry directly — the lateral axis must exceed the antero-posterior, in thorax, abdomen, and pelvis alike.

This is the doctrine in its sharpest form: the body is ovoid, not round; the egg-shape governs all three cavities of the trunk; departure from it produces symptom.3

Why the lateral axis must win

Ida does not explain at length, in the surviving recordings, the mechanical reasoning behind the ovoid rule. She treats it as something a practitioner comes to see by working on enough bodies. But the reasoning is recoverable from the rest of her teaching. The trunk is a stack of three cavities — thoracic, abdominal, pelvic — each of which contains soft, mobile contents that need room to move. The diaphragm, the great horizontal partition between the upper two, works best when its dome can descend along a wide lateral base. The pelvic floor, similarly, supports the abdominal contents from below across a transverse span. When a body becomes round — when the antero-posterior dimension swells to match or exceed the lateral — the diaphragm's mechanics change, the breathing pattern flattens, and the viscera are reorganized in ways that the body experiences as symptom. The roundness is not the visible sign of something else going wrong; it is the going-wrong, named in terms of shape.

"We have every reason to believe that this project will lend itself to measurement. Her findings seem to be saying loud and clear that as a man approximates the vertical, that is ears over shoulders, shoulders over hips, hips over knees, knees over ankles, certain very significant changes occur in the kind of neuromuscular behavior, can and these changes can be registered and they can be recorded by electromyographic and electroencephalographic measurements. Ralfas in general are not sufficiently scientifically sophisticated to demand measurements. They're willing to settle with contour, with form, without with recognizing the outward form of contour. In other words, they know that the tension and relaxation at all levels of the body reflect into the superficial level, and that they can look at that superficial level, and they can find out what is going wrong at a deeper level. To the seeing Malthus eye, this is the clue to the personality, both the physical personality and the psychological personality."

In a discussion at UCLA, Ida explains why the practitioner reads structure through contour — and what contour tells about everything underneath.

Ida's claim that contour is the visible reflection of deeper relationships is the structural premise that lets her treat the round body as a diagnostic fact.4

The premise that contour reads inner structure is what makes the ovoid doctrine usable as a teaching tool. A practitioner does not need to see inside the thorax to know that a round body has a round diaphragm and a foreshortened lateral excursion in the rib cage. The roundness on the outside is the evidence. This is why Ida could teach the principle as a shape-rule — wider than deep, in trunk, abdomen, and pelvis — and trust that students who learned to see contour would learn to read mechanics.

What judo does to a body

Feldenkrais's roundness was not random; it was, in Ida's reading, the trained shape of a world-class judo body. Judo organizes the practitioner around a low center of gravity and the capacity to absorb and redirect rotational force. The barrel chest, the thickened anterior-posterior dimension, the rounded back — these are not faults of training, they are the consequences of training of a particular kind. What Ida is doing when she names Feldenkrais as her example is something specific and somewhat provocative: she is saying that even the most accomplished athletic shaping of a body produces, in her terms, a structurally compromised form. The roundness that judo built was still roundness, and the symptoms still followed.

"So you're going to have an experience, tell you. At 07:30, same time as class. Sports and exercise build strong bodies and rigid body images. That's what they do. They build strong bodies and rigid body images. That is correct. In terms of structure they're not very stable. These are task oriented. They are not exploratory. They are not experiencing There are a limited number of potential responses when you do exercises. A very limited number of potential responses. It's a closed system. You learn an exercise, you do it, and that's about what you can do with it."

In her 1974 Open Universe class, Ida states a general claim about what sports do to the bodies that practice them.

Ida's claim that sports build strong bodies and rigid body images is the broader frame inside which the Feldenkrais story sits — judo built Moshe's roundness in the same way.5

There is no condescension in Ida's reading of Feldenkrais. She admired him; she enjoyed working on him; she calls him understanding and appreciative. What she is saying is that even the highest forms of athletic accomplishment do not produce, by themselves, the kind of structural ease the work was developed to evoke. The judo body is strong and the judo body is symptomatic. The two facts coexist, and the practitioner's job is to release the structural condition without taking away the strength.

The body as plastic medium

The reason Ida could speak of releasing the roundness at all — of converting a round body back to an ovoid one — is that she held the body to be plastic. Not metaphorically, but in the technical sense the word carries in materials science: a substance that can be distorted by pressure and then, by suitable means, be returned toward its proper form, provided the elasticity has not been exceeded. The plasticity claim is the necessary companion to the ovoid claim. Without plasticity, you could observe that Feldenkrais was round and that round bodies have symptoms, but you would have no path from there to here. With plasticity, the practitioner has a working medium.

"body is a plastic medium, and you're going to hear that several times before we get out of here today. Now, we are ready to define rolfing structural integration. It is a system of organizing the body so that it is substantially vertical, substantially balanced around a vertical in order to allow the body to accept support from the gravitational energy. Two characteristic qualities of the body make this unlikely situation possible. The material body of man is a plastic medium, as I just told you. Now by dictionary definition, a plastic substance is one which can be distorted by pressure and then can, by suitable means, be brought back to shape, providing that its elasticity has not been exceeded. Now the question is, what is back to shape in this context really mean?"

In her 1974 Healing Arts lecture, Ida defines the plasticity of the body and what 'back to shape' actually means.

Ida's technical definition of plasticity — distortable by pressure, returnable by suitable means — is the mechanical principle that makes the round body's transformation possible.6

The plasticity claim is, in 1974, still controversial. Ida acknowledges this in her teaching — twenty-five years earlier, she says, no one would have believed the statement; fifty years earlier they would have institutionalized her for it. The reason is that medicine had long treated body shape as fixed by genetics, age, and accumulated pathology. To say that a 73-year-old judo master's round body could be reshaped into something more nearly ovoid — and that doing so would relieve symptoms — was, in the mid-twentieth century, a radical structural claim. The Feldenkrais case is one of the empirical demonstrations Ida points to.

"And the ROFA corrects the situations which has happened to the individual, which has distorted his ability to get himself vertical. Great. Okay. That's good. Now let me see if there's anything else that can you think of that we didn't handle. Let me look down here. We oh, you well, we we never talked about the plasticity of the body. But Oh, good. Talk about that too. You think so? The plasticity of the body. Oh, yes. Put put in the idea of the body. Let me see how I'll ask a question."

In a 1971-72 interview, Ida is asked about the plasticity of the body and confirms it as central to the work.

Ida's interviewer recognizes plasticity as the central claim of the work, and Ida agrees — without plasticity, there is no path from round to ovoid.7

The mechanism by which a round body becomes ovoid is the addition of energy to the fascia. Ida describes this directly in her Healing Arts lecture: pressure is energy, the practitioner's fingers and elbow are the source, and the fascial sheaths — the organ of structure — are what receives the addition. As energy is added, the collagen bonds soften, the relations among the sheaths change, and the contour of the body changes with them.

"And I'm talking here about energy being added by pressure to the fascia, the organ of structure, to change the relation of the fascial sheaths of the body, to balance these around a vertical line which parallels the gravity line. Thus, we are able to balance body masses, to order them, to order them within a space. The contour of the body changes, the objective feeling of the body to searching hands changes. Movement behavior changes as the body incorporates more and more order. The first balance of the body is a static stacking, but as the body incorporates more changes, the balance ceases to be a static balance. It becomes a dynamic balance. These are the physical manifestations of the increasing balance, but there is an outgoing psychological change as well toward balance, toward serenity, toward a more whole person. The whole man, the whole person evidences a more apparent, a more potent psychic development."

Ida frames the practitioner's work as the addition of energy to the fascial body to change the relations of fascial sheaths around a vertical line.

The mechanism by which a round body becomes ovoid is the addition of energy — pressure — to the fascial organ of structure, reorganizing it around a vertical.8

The ovoid as architecture of the trunk

When Ida says the body is ovoid, she means specifically that each of the three trunk cavities — thoracic, abdominal, pelvic — must be wider laterally than it is from front to back. This is the architecture of the trunk that her work tries to evoke. The thoracic cavity must be wider across than deep, so the diaphragm can drop along a broad transverse base and the lungs can fill three-dimensionally. The abdominal cavity must be wider across than deep, so the viscera have proper lateral support and the diaphragm's descent is not obstructed. The pelvic basin must be wider across than deep, so the pelvic floor can carry weight transversely rather than from front to back. The three ovoids are stacked; the gravity line passes through the geometric center of each.

"This vertical line registers the alignment of the ankles, with the knees, with the hip joints, with the bodies of the lumbar vertebrae, with the shoulders, with the ears. This vertical line is reminiscent of the prickles on the chestnut burrow. All those prickles pointing straight toward the center of the earth. If the lines are substantially vertical. This is a static verticality, however. This is the verticality taught by every accepted school of body mechanics operating in this century, and the Harvard group heads the list. All schools of body mechanics teach this measuring stick and verticality, but no other school of body mechanics teaches how to achieve it. But because the body has an unforeseen, unexpected quality, it can be done. The body is a plastic medium. Now this is incredible, and twenty five years ago, no one would have believed this statement. Fifty years ago, they'd have put me in a nice sunny southern room. You've given me pretty good care, maybe."

Ida defines the vertical that the ovoid trunk must align with — ankles, knees, hips, lumbars, shoulders, ears.

The ovoid is not just a shape rule for each cavity; it is the geometry that lets the three cavities stack along a single vertical line.9

Notice how the ovoid claim and the vertical claim depend on each other. A round trunk cannot align cleanly along a vertical because the gravity line, dropping from the ears to the ankles, cannot pass through the geometric center of a cavity that is as deep as it is wide. The line must either fall forward of the structures or be held in place by tension. Either way, the body is no longer accepting gravity as support — it is fighting gravity to maintain a vertical it cannot rest into. The ovoid geometry is what makes resting verticality possible, which is why Ida treats the two doctrines as inseparable.

"And if you are really going to understand what I'm talking about tonight, a little meditation on those two words wouldn't do any harm. Because you see, in meditating on posture and meditating on structure, you can ask the same questions. You can ask the question of, now see here, if I alter this structure, what can I hope to get from it? Similarly, you can say, if I alter this posture, what can I hope to get from it? This is a big question. And you ask any of your MD friends, and they'll say, oh, Rod, nothing. Ain't so? You change those relations. You change that structure."

Ida distinguishes posture from structure — what you do with the body from how the body's parts relate to each other.

The ovoid doctrine is a claim about structure, not about posture. You cannot stand your way out of a round body; the relations themselves must change.10

Symptoms ride structure

The most consequential part of the Feldenkrais doctrine, for clinical practice, is the claim that releasing the roundness releases the symptom. Ida is uncharacteristically direct about this: when you release the round body, the symptom disappears. The symptom may be asthma, may be emphysema, may be something else; the variety is wide. But the relationship — round body, attendant symptom; ovoid body, symptom released — she presents as reliable. This is a strong empirical claim, and it is offered without the qualifications a modern clinical paper would attach. It is offered the way Ida offers most of her structural claims: as something she has seen enough times in her own work and in her students' work to teach as a rule.

"Anyone who is going in those directions and has been working in it, for me, is just beautiful. And I have seen this in people who could not hear themselves, who could not become aware of what was going on, who were lying their stiffest boards when they had ever I mean, lying on flat on the ground in a fine cushion. Gives you all the support. And if I can't lie on the ground, letting go and accepting support, this probably is an eye opener. Am I really this tight lying on the ground? Well, it's not me on the ground. It's you on the ground. How does it feel? Well, I'm so relaxed. I it's marvelous. And all the time, everything is going to pieces."

In a UCLA discussion, Ida responds to a question about lasting change by describing what it means when a body's shape can change in thirty minutes.

If a body's shape can change within minutes, the cultural assumption that bodies are fixed is broken — and so is the assumption that symptoms tied to shape are fixed.11

What Ida does not say — and what subsequent research on Structural Integration would have to take up — is exactly which symptoms ride which structural distortions, and in what statistical pattern. Her claim is qualitative and clinical: she has seen the round body release into an ovoid one and the breathing pathology resolve, often enough that she will name it as doctrine. The student in 1974 hearing this for the first time is being asked to test it in their own practice, not to accept it on authority.

"Rolfing upsets the disequilibrium, there isn't any doubt about it, of connective tissue realigns it. In relationship to the environmental field, that is obvious. We've accepted that as an idea. But it also brings the thought to the surface many of these thoughts I am talking about, the thoughts and emotions and our interpretation of those which is the physical manifestation of the body. And it is through this channel that I think Rolfi makes a tremendous contribution. It is not one that is easily evaluated in our laboratories. This is why I think there is a more permanent change to this kind of education than there is to track and field. I am not against track and field now. I think it has a role but I do not think it has the same kind of role in the development of body that we have thought of in the past."

In a 1974 Open Universe lecture, Ida describes how the work brings thoughts and emotions to the surface alongside structural realignment.

The release of the round body is not only physical; it carries a release of the static thought-forms that hold the body in its symptomatic shape.12

The doctrine carries an epistemological caveat that Ida is careful to attach. She does not present the ovoid claim, or the symptom claim that follows from it, as a closed body of revelation handed down to her students. She presents it as something her practitioners are charged with continuing to test and to refine. The 1973 Big Sur class includes one of her clearest statements of this — that nothing in the history of the world ever came as a closed-end revelation, and Structural Integration is no exception.

"The myofascial is what we are dealing with and that is the The myofascial is what you are dealing with, in that you are dealing with an energy unit, the muscle, contained within a it's up to you people to go out and get a few more revelations. Structural integration is not a closed end revelation. There never was a closed end revelation, not in the history of the world or the history of the world. Everything that can be regarded as a revelation is open ended. In terms of sense. Now it wouldn't hurt us to talk about that last sentence right here in the middle because it is true. We got off on this table one day last week. Function can, will, and does What goes on to change it?"

Ida acknowledges, in the 1973 Big Sur class, that Structural Integration is not a closed-end revelation and that practitioners must keep testing.

The ovoid claim is offered as doctrine but also as open question — practitioners are charged with continuing to verify what shape does and does not produce symptom.13

What the practitioner does to a round body

If a round body is to become ovoid, what does the practitioner actually do? Across her teaching, Ida names the operations as releasing the superficial fascial wrappings that hold the antero-posterior dimension closed, lengthening the back, freeing the lateral attachments of the rib cage, and reorganizing the relationship between the pelvis and the thorax along the lateral axis. The work is not primarily front-to-back; it is laterally outward. The practitioner is widening, not compressing. Each of the ten hours contributes some part of this widening — the first two by freeing the thorax and pelvis from each other, the middle hours by addressing the lateral structures of the pelvis and the rotators, the upper hours by opening the shoulder girdle laterally.

"Well, it seems to me I don't know. He was presenting from you. Watch these osteopathic concepts. It seems to me that in the eighth and the ninth and the tenth hour, we are again working with fashion, with those superficial layers of fashion. Not really the superficial layer, but with those superficial layers of fascia. Not fascia surrounding individual organs. With the fascia that relates the body. You see again, this is a concept which as far as I know, has never been brought out. The fact that body is related, the organs are related, the body is made a whole by its fascia. Far as I know, this point has never been brought up. Far as I know, nobody's ever really used their head on fascia anyway."

Discussing the upper hours of the recipe, Ida names fascia as the tissue that makes the body whole and ovoid.

The ovoid is achieved through the fascial body; Ida is direct that no one had thought clearly about fascia in these terms before her work.14

The widening work is not symmetric across the recipe. Different hours address different aspects of the round-to-ovoid transformation. The first hour begins by unwrapping the superficial fascial envelope that holds the thorax pulled toward the antero-posterior. The fifth hour, working through the psoas and the abdominal wall, addresses the depth of the abdominal cavity. The seventh hour, working on the neck and head, completes the lateral organization of the upper trunk. By the tenth, the practitioner is confirming that the three cavities have indeed stacked along the vertical, each wider than deep.

"You see, you're still on the same trail that you were on that first hour. That first hour, you started up on the trunk to get it free to the pelvis. You went down to the legs to get it free to the pelvis. Now you go down to the legs to give it formation. You come up to the pelvis again. You go up to the trunk again. And you go up to the trunk in order to get it out of this posture and into this posture. Because when the one is sitting on top of the other, there is no moment of rotation on the part of gravity to break it down. And all the rest of it are little tricks within it, you see, to make it possible to do that. The trick trick was how do you how do you get that back lengthened. I remember what a time I had with Bill Schutz who insisted on believing that you lengthen a muscle by going along it and lengthen it, but you don't. You must when you lengthen a muscle by going across it, etcetera, etcetera."

In her account of the second hour, Ida describes the practitioner moving from the periphery toward the center, freeing the pelvis from the thorax and the legs.

The transformation toward the ovoid begins by freeing the pelvis from above and below; each hour widens what the previous hour has opened.15

Underneath the hour-by-hour widening is a more basic structural change: the layers of the body have to differentiate. The round body is not only thick from front to back; it is also a body in which the muscular layers have glommed together and lost their independent excursion. Ida's colleagues in the 1974 Open Universe class describe this in terms practitioners use among themselves — the extrinsic muscles dominating, the deep muscles silenced, the whole working as one undifferentiated mass.

"And that or they imitated someone in their family and walked that way. And then that pattern gets set. And then it can't be changed unless someone comes and someone like a raw bird. Some other method where you can change those patterns. See, the average person moves primarily with Extrinsic muscles, surface muscles, or groups of muscles that are stuck together. We're gonna lean forward. There's little differentiation in the in the movement. And then as you watch as the rofting goes on, you see that the muscles start doing their own work instead of being grouped all in one big glob. And then you get movement which comes from deep in the body as well as on the surface."

A colleague in the 1974 Open Universe class describes what happens as the work proceeds and the muscles begin to differentiate.

The release from extrinsic-muscle dominance into deeper, differentiated movement is what allows a round body to find its ovoid form.16

The piano teacher and the deadline body

The Feldenkrais case was unusual in that Ida had to do the work on a fixed deadline — twelve days, all the money he had. Her usual teaching is that the body changes at the rate it can integrate change, and that the practitioner should not force the schedule. In the longer discussion of her own early work, she contrasts the Feldenkrais arrangement with the piano teacher she worked with over three months, and with the way clinical practice typically goes — working with sections, then learning to read the body as a whole, then arriving at the ten-session form she eventually codified. The Feldenkrais work was, in this sense, an exception that she remembered partly because the body asked her for it on those terms.

"That's right. And the mature thing that we're familiar with, which is the 10 formal sessions of rolfing that are now current around the world. Now, what was the specific line of thought that got you from individual work with an arm or a foot or an ankle? Well, the arm didn't fit into the body. So you went further up or down. That's right. When did you begin to get a notion that there was there were stages, one after the other, which would be the exact way to realign the body? Like, why what stage comes before another stage in structural integration? The body talks about it. That's all I can say. The body talks about it and those people who are in the audience, and I imagine there are a good many of them, a number of them, who have studied in my classes, know what I mean when I say the body talks about it."

In a 1974 Structure lecture, Ida describes how she moved from working with individual body parts to recognizing the ten-session sequence.

The recipe emerged because the body 'screams' for the next move; the round body of a Feldenkrais asks for one set of moves, but every body asks in its own way.17

The Feldenkrais case was, in retrospect, both an exception and an exemplar. An exception because the time frame was compressed and the body was unusually shaped. An exemplar because the structural transformation she got — a round judo body opening toward something more nearly ovoid — was visible in the kind of way that taught students what the work was for. She refers back to him for the rest of her career not because the case was easy but because it was unambiguous: a body whose roundness was symptom, and whose symptom released as the roundness released.

"Uh-huh. The first hour is the beginning of the tenth hour. Okay? Uh-huh. The second hour is a follow-up of the first hour. Uh-huh. It's just the second half of the first hour. Okay? And the third hour is the second half of the second and first hour. It's literally a continuation. I clearly I clearly saw, you know, last summer that continuation process and how and, you know, Dick talked about how, you know, the only reason it was broken into 10, you know, sessions like that was it because the body just couldn't take all that work. Couldn't take it right. But I just sitting on just trying to figure out how the hell she ever figured out that process, and then began to see it. What she did is what most of of us need to do more. She just sat and watched bodies."

A senior student in the 1975 Boulder advanced class describes the continuity of the early hours — and the integrative logic that lets each hour widen what the previous one opened.

The transformation from round to ovoid is not accomplished in any single hour; it is the cumulative continuation of the work across the recipe.18

Coda: Two somatic schools, one encounter

Feldenkrais and Ida Rolf would each go on to found enduring schools of somatic work. Feldenkrais's method, focused on awareness through movement and what he called functional integration, would attract students for the rest of his life and beyond. Ida's Structural Integration would spread across North America, South America, and Europe in the decade after her work with Feldenkrais and become a discipline taught at multiple institutes. The two methods are different — Feldenkrais works through movement and the nervous system; Ida works through fascia and gravity — but their founders met once, in England, in 1958, with one demanding the other's work and the other reluctantly agreeing on a twelve-day schedule. From that encounter Ida drew the doctrine of the ovoid body.

"And man, according to Feldenkrais at least in his agitation, man has the smallest moment of inertia of any animal. And it may be an explanation for his erect posture, is that the evolutionary thrust has brought him to this point where this can is one of his main weapons in his defense structure against larger animals, for instance, the bull and the bullfighter. The bullfighter can turn instantly, you know, and this big animal just can't move. And so he's, the bullfighter is really in total control. The other important thing is that, what I just mentioned is that the closer you get to the vertical alignment, the less effort it takes to keep that broom there. Control forces are very small."

Years later, a colleague of Ida's references Feldenkrais's own argument about the moment of inertia and the evolutionary thrust of the upright human body.

The cross-reference shows how Feldenkrais's and Ida's structural thinking continued to engage each other in the somatic literature, even as their schools diverged.19

Ida's story about Feldenkrais is, in the end, less a story about him than a story about what she learned from him. She learned that even a world-class athlete's body could be round in the structural sense that made symptoms inevitable. She learned that twelve days was enough — barely — to put a serious dent in such a body. She learned that the geometry of the trunk, in all three of its cavities, had to be wider laterally than it was front-to-back, or the body would not work as it was made to work. The ovoid doctrine is the compressed form of that learning, and it stayed with her teaching from 1958 until the end of her life.

See also: See also: Ida Rolf, RolfA5 public tape (RolfA5Side2) — a discussion of fascial planes of the shoulder girdle and hip girdle that would map the geometry by which the trunk's ovoid form is held; included as a pointer for readers interested in the unmapped anatomical territory Ida names but does not chart. RolfA5Side2 ▸

See also: See also: Ida Rolf, Big Sur 1973 Tape 17 (SUR7332) — an extended reflection on fascia as a system from birth onward, with comments on the open-ended nature of Structural Integration as a body of knowledge. SUR7332 ▸

See also: See also: Ida Rolf's introduction to the 1974 Structure Lectures (STRUC1) — biographical framing of her work, the Barnard PhD, Rockefeller Institute, and the Schrödinger lectures that gave rise to her early thinking about the relation between body chemistry, body physics, and human behavior. STRUC1 ▸

See also: See also: 1974 Open Universe Class tape UNI_043 — a colleague's argument that the connective tissue is the interface between the body's energy fields and the larger cosmos, a framing complementary to Ida's ovoid geometry. UNI_043 ▸

See also: See also: 1974 Open Universe Class tape UNI_044 — a discussion of inefficient movement patterns set early in life (the toddler's spread-legged stance, family imitation) that lock a body into a shape only the work can reach. UNI_044 ▸

See also: See also: 1974 Open Universe Class tape UNI_073 — Ida on the body as constantly changing rather than static, with reflections on how molecular and hormonal flux make plasticity continuous rather than episodic. UNI_073 ▸

See also: See also: 1971-72 mystery tape PSYTOD2 — an interview in which Ida states the goal of the work as bringing a person toward verticality so that gravity supports rather than tears down the body, and introduces the plasticity claim. PSYTOD2 ▸

See also: See also: 1975 Boulder advanced class tape T1SB — discussion of the second hour and the lateral release of the back, with attention to how stored fascial tension is released as molecular alignment changes. T1SB ▸

See also: See also: Ida Rolf, RolfA3 public tape (RolfA3Side2) — discussion of the multiple bodies (cellular body, awareness body, energy body) and how the matching among them changes when the structural body changes. RolfA3Side2 ▸

See also: See also: 1976 advanced class tape 76ADV281 — Ida on integration as a single concept rather than a collection of parts, with the observation that no book has ever treated the body as one. 76ADV281 ▸

Sources & Audio

Each source row expands to show how the chapter relates to the topic.

1 Feldenkrais Encounter and Body Shape various · RolfB5 — Public Tapeat 7:16

Ida tells her advanced class about meeting Moshe Feldenkrais in England in 1958. Feldenkrais had watched her give a demonstration and approached her afterward saying he had to have the work. She describes him as a huge bear of a man, the second most expert judo practitioner in the world after a Japanese prince she had never met. She names his shape directly — round like that, tall like that, thick like this — using her hands to show the dimensions. The passage matters to the ovoid-body article because it is the moment Ida's structural principle attached itself to a specific, named human being. For the rest of her teaching career, when she described what a round body looks like, she had Feldenkrais in mind.

2 Feldenkrais Encounter and Body Shape various · RolfB5 — Public Tapeat 9:11

Ida names Feldenkrais's judo body as her example and uses it to state a general structural rule. Round bodies, she says — bodies that have lost the difference between their lateral and antero-posterior dimensions — always have symptoms. The release of the roundness, she claims, is also the release of the symptom. She does not specify which symptom appears in which body; the doctrine is structural, not diagnostic. The passage matters to the ovoid-body article because it is the clearest articulation of the cause-and-effect chain Ida drew from her work with Feldenkrais: roundness is not an aesthetic variation, it is a structural condition that produces pathology, and changing the shape of the body changes the pathology along with it.

3 Feldenkrais Encounter and Body Shape various · RolfB5 — Public Tapeat 9:42

Ida states the geometric rule she derived from her work with Feldenkrais. The body is ovoid, not round. The lateral axis must be greater than the antero-posterior axis for the body to work, and this is true in the abdomen, the chest, and the pelvis. The egg-shape governs all three cavities of the trunk. She lists the symptoms that may appear in a round body — asthma, emphysema, disorders of breathing — but the list is illustrative, not exhaustive. The point is the geometry. The passage matters to this article because it is the clearest, most compressed statement of the ovoid doctrine in Ida's recorded teaching. Everything else in the article either leads to this claim or follows from it.

4 Scientific Validation at UCLA 1974 · Open Universe Classat 11:15

Speaking at UCLA in 1974, Ida explains why practitioners of Structural Integration read the body through its outer contour. She says the practice does not require sophisticated scientific measurement; what the practitioner needs is the seeing eye. Tension and relaxation at all levels of the body reflect into the superficial level, so the practitioner can look at the surface and infer what is happening underneath. Contour, in her account, is not cosmetic — it is the readable surface of the internal arrangement. This passage matters to the ovoid-body article because the whole doctrine depends on this premise: that a body's outer shape, including its roundness or its proper ovoid form, is the legible record of the structural relationships inside, and that changing the shape changes the relationships.

5 Energy Field Experience Invitation 1974 · Open Universe Classat 30:47

In a 1974 Open Universe lecture, Ida tells her audience that sports and exercise build strong bodies and rigid body images. The body that emerges from athletic training, she says, is task-oriented, not exploratory; it has a limited repertoire of responses; it operates as a closed system. She does not say sports are bad — she says they produce a particular kind of body that has lost its plasticity. This passage matters to the ovoid-body article because it generalizes the lesson she drew from Feldenkrais. The roundness she saw in him was not a personal failing or a chance shape; it was the structural signature of a particular training discipline, and the rigid body image that came with it was as much a consequence of the sport as the muscular thickness.

6 Introductions of Hunt and Rolf 1974 · Healing Arts — Rolf Adv 1974at 0:00

Ida defines, for her Healing Arts audience in 1974, what she means when she calls the body a plastic medium. She uses the technical sense of the word: a substance is plastic if it can be distorted by pressure and then, by suitable means, be brought back to shape, provided its elasticity has not been exceeded. She then specifies what back to shape means in this context — vertical, vertical to the surface of the earth, vertical like the force of gravity. The body is plastic because it can be reshaped, and the shape it can be reshaped toward is the one that lets it accept the gravitational field as support. This passage matters to the ovoid-body article because plasticity is the mechanical condition that lets the round body become ovoid again.

7 The Rolf Institute 1971-72 · Mystery Tapes — CD2at 2:27

In a 1971-72 interview that survives among the mystery tapes, Ida is asked to explain the goal of the work. She names verticality as the goal — bringing the human toward the vertical stance so that the gravitational field can support rather than tear down the body. The interviewer then prompts her to discuss the plasticity of the body, recognizing it as a claim she has not yet made explicit in this conversation. Ida agrees that the manipulation of tissue depends on the plasticity premise. The passage matters to the ovoid-body article because it shows Ida treating plasticity not as a peripheral technical claim but as the central mechanical premise of the work — the premise that makes the transformation from round to ovoid possible at all.

8 Balancing the Body in Gravity 1974 · Healing Arts — Rolf Adv 1974at 5:51

Ida explains, in her 1974 Healing Arts lecture, how the practitioner's hands actually change the shape of a body. The work is the addition of energy by pressure to the fascia, which she calls the organ of structure, in order to change the relation of the fascial sheaths and balance them around a vertical line. The contour of the body changes; the objective feel of the body to searching hands changes; movement behavior changes. She also names a psychological corollary — the person becomes more whole, more potent in their psychic development. The passage matters to the ovoid-body article because it names the mechanism by which roundness is released. The round body is reshaped toward the ovoid by the deliberate addition of energy to its fascial organ of structure.

9 Defining Rolfing Structural Integration 1974 · Healing Arts — Rolf Adv 1974at 39:12

In her 1974 Healing Arts lecture, Ida names the vertical line that organized bodies are built around. The line passes through the ankles, the knees, the hip joints, the bodies of the lumbar vertebrae, the shoulders, and the ears. She invokes the image of the chestnut burr — every spine on the burr pointing straight toward the center of the earth — to describe what verticality looks like in a properly organized body. She also notes the limit of this measuring stick: it is a static verticality, the one taught by every accepted school of body mechanics, but no other school teaches how to achieve it. This passage matters to the ovoid-body article because the ovoid stacking of the three trunk cavities is what makes that vertical line attainable; without ovoid cavities, the line cannot pass through.

10 Balance, Structure, and Posture various · Soundbytes (short clips)at 36:38

In one of her short public talks, Ida draws a careful distinction between posture and structure. Posture, she says, is what you do with structure. Structure is the way you relate parts of the body to each other. If structure is in balance, posture is automatically good. If you ask conventional medicine what altering structure can do for you, the answer will be nothing — but Ida disagrees: change the relations, change the structure, and you get the ease and vitality her friends and students experience. This passage matters to the ovoid-body article because it explains why the ovoid principle is not a recommendation to stand differently. A round body cannot be made ovoid by holding itself differently; the underlying fascial relations must change, and that is what the practitioner's work addresses.

11 Rolfing, Glands, and Energy Centers 1974 · Open Universe Classat 23:39

Responding to a question at UCLA in 1974, Ida and her colleague discuss what it means culturally when a body's shape can be changed within thirty minutes — or really within two minutes — of structural work. They note that the dominant cultural assumption is that bodies do not change except by aging, and that this assumption is blown in the first two minutes of a session. The conversation also touches on how a small contribution of iodine or hormone to a person with a glandular deficiency can produce an extraordinary change in the whole person, and Ida engages this as an analogy worth entertaining. The passage matters to the ovoid-body article because it shows Ida defending, in dialogue, the underlying claim that makes the ovoid doctrine actionable: that shape is changeable, and that symptoms tied to shape change with it.

12 Rolfing and Body Plasticity 1974 · Open Universe Classat 0:08

In a 1974 Open Universe lecture, Ida discusses how the work realigns connective tissue in relation to the environmental field and also brings thoughts and emotions to the surface. She frames these thoughts and emotions as the psychological face of the physical manifestation of the body — not separate, but the same structural fact seen from a different angle. She contrasts this kind of education to track and field, granting that athletic training has its place but insisting it does not produce the same kind of body change. The passage matters to the ovoid-body article because it widens the symptom claim: when the round body releases, what releases is not only the breathing pathology but also the static thought-forms held in the same fascial geometry.

13 Defining Fascia and Myofascial Units 1973 · Big Sur 1973 — Tape 17at 25:39

In the 1973 Big Sur advanced class, Ida is in the middle of a discussion about fascia and structure when she stops to make a methodological point. Structural Integration, she says, is not a closed-end revelation. There never has been a closed-end revelation in the history of the world; every revelation is open-ended. She charges her students with going out and getting a few more revelations themselves. The discussion then turns to function and how it changes — to the man-child who wants to climb a tree and whose desire eventually creates the muscular pattern that lets him do it. The passage matters to the ovoid-body article because it situates the ovoid doctrine in Ida's epistemology: the claim is held firmly but offered as something practitioners must continue to test in their own work.

14 Approaching the Eighth Hour various · RolfA4 — Public Tapeat 14:56

Discussing the eighth, ninth, and tenth hours of the ten-session series, Ida says these later hours are again working with fascia — not the superficial first layer, but layers of fascia that surround and relate organs and that make the body whole. She emphasizes that the fact that the body is related, that the organs are related, that the body is made a whole by its fascia, is a point that as far as she knows has never been brought out. Nobody, she says, has really used their head on fascia anyway. The passage matters to the ovoid-body article because it names fascia as the tissue through which the ovoid form is built and maintained. The round body is held round by fascial wrappings that no longer give the lateral dimension the space it needs.

15 Second Hour Review and Structure various · RolfB3 — Public Tapeat 0:48

Describing the second hour of the ten-session series, Ida explains that the practitioner is continuing what the first hour began — freeing the pelvis from the thorax above and from the legs below, then lengthening the back to balance the trunk over the pelvis. She compares this work to the trick of getting the moment of rotation toward zero, the physics term for the alignment that allows gravity to support rather than to topple. She also corrects a misconception she attributes to Bill Schutz: muscles are lengthened by working across them, not along them. The passage matters to the ovoid-body article because it shows the early hours of the recipe doing the work of making the trunk laterally available, which is the prerequisite for the ovoid form to emerge.

16 Movement Patterns and Differentiation 1974 · Open Universe Classat 12:55

In a 1974 Open Universe class, one of Ida's colleagues describes what changes as the work proceeds. The average person, the colleague says, moves primarily with extrinsic muscles — surface muscles, or groups of muscles that are stuck together. There is little differentiation in the movement. As the work continues, the muscles start doing their own work instead of being grouped in one big glob, and movement begins to come from deep in the body as well as from the surface. The passage matters to the ovoid-body article because the round body is also the undifferentiated body: the antero-posterior thickening is partly a glomming together of layers that should move separately. Releasing the ovoid form requires this same differentiation of layers.

17 Developing the Ten-Session Series 1974 · Structure Lectures — Rolf Adv 1974at 3:43

In a 1974 Structure lecture, Ida is asked how she moved from working with individual arms, feet, and ankles to recognizing that there were stages, one after the other, that constituted the proper sequence for realigning a body. She answers that the body talks about it — that anyone who has studied in her classes knows what she means by this. After the first hour, every one of ten people will show the same secondary symptom; the practitioner then addresses that, and the body screams from somewhere else, and you address that in the third hour, and so on, until the body has nowhere left to scream from. The passage matters to the ovoid-body article because it shows how Ida's general method — let the body indicate the next move — applied to the work she did with Feldenkrais, even on an accelerated schedule.

18 Three Primary Manifestations of Disease 1975 · Rolf Advanced Class 1975 — Boulderat 0:17

In the 1975 Boulder advanced class, a senior student describes the structural logic Ida had been teaching: the first hour is the beginning of the tenth hour, the second hour is a continuation of the first, and the third is the continuation of both. The student credits Ida with the realization that the recipe was broken into ten sessions only because the body could not absorb all the work at once — the underlying process is continuous. The discussion ranges across how Ida watched bodies for years to figure out the sequence, and how she integrated her own life around understanding Structural Integration. The passage matters to the ovoid-body article because it shows that the ovoid transformation is achieved cumulatively across the whole recipe, not in any single move.

19 Gravity, Balance and Potential Energy 1971-72 · Mystery Tapes — CD3at 15:52

In a 1971-72 discussion, one of Ida's colleagues references Moshe Feldenkrais's argument about the moment of inertia of the human body — that man has the smallest moment of inertia of any animal, which may explain his erect posture and his evolutionary advantage against larger animals. The colleague invokes the image of the bullfighter, who can turn instantly while the bull cannot, as Feldenkrais's example. The colleague then connects this to Ida's own structural claim about vertical alignment: the closer the body comes to vertical alignment, the less effort it takes to maintain. The passage matters to the ovoid-body article because it shows the two schools' arguments running parallel — Feldenkrais analyzing rotational dynamics, Ida analyzing the ovoid stacking of the trunk along the vertical — and converging on the same conclusion about why human verticality matters.

Educational archive of Dr. Ida P. Rolf's recorded teaching, 1966–1976. "Rolfing®" / "Rolfer®" are trademarks of the DIRI; independently maintained by Joel Gheiler, not affiliated with the DIRI.

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