The dictionary definition, used precisely
Ida did not invent the word plastic and she did not use it loosely. In her 1974 Healing Arts lecture at the California Institute of the Healing Arts and Sciences, she walked the room through Webster's definition as a chemist would — the body, she argued, satisfies the technical criteria. A plastic substance can be distorted by pressure and then brought back to shape by suitable means, so long as elasticity has not been exceeded. The phrase "so long as elasticity has not been exceeded" is the load-bearing clause; it concedes that some bodies have been too long deformed to come fully back, and it concedes that the practitioner can, in principle, push past the limit and do harm. Ida was not selling a miracle. She was naming a material property of human tissue and then asking what could be done with it. The first quote below is the core statement of the doctrine and the definitions that follow from it; it is the passage Ida treated as foundational and returned to in nearly every public talk of the period.
"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? And the answer is simple and really expected. Back to shape in this context means vertical."
From her 1974 Healing Arts lecture, defining the practice in chemist's terms:
The compressed dictionary version of the doctrine deserves a closer look on its own, because it is the sentence Ida treated as the most quotable summary of her position. Stripped of its surrounding context, the passage reads almost like a chemistry textbook entry — and that was the point. Ida wanted listeners to hear that the claim was technical rather than rhetorical. The plasticity of the body was a property that could be stated in a single sentence and tested against the standard definition of the word. The passage below preserves the doctrine in that compressed form, lifted from the same 1974 Healing Arts lecture and used by Ida as a self-contained teaching unit.
"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? And the answer is simple and really expected. Back to shape in this context means vertical."
From the same 1974 Healing Arts lecture, the doctrine in its most compressed form:
Ida's care with the word matters because she was being precise where most of her contemporaries were being metaphorical. When a yoga teacher or a dancer said the body was flexible, they meant something behavioral and trainable. When Ida said the body was plastic, she meant something material — a chemical property of the connective tissue itself, measurable in principle, alterable by the addition of energy. The next passage shows her pressing this distinction in a different room, the 1973 Big Sur advanced class, where she connects the plasticity claim directly to the segmental architecture of the body. The body is plastic not despite being segmented but because it is segmented: it is a stack of bony parts held in an elastic envelope, and the envelope can be reorganized.
"That idea is the recognition of the fact that bodies are unbelievably plastic materials. And if you go to the dictionary, you'll find Mr. Webster says that a plastic is something which can be deformed, deformed, without breaking. It can be deformed to a great extent, extensively, without breaking. And I say to you, yes, this is one definition of a plastic. The other definition of a plastic is that it can be reformed without breaking. And people come to grief, come to their griefs, by virtue of the fact that these bodies of theirs have been being deformed under the pull of gravity since they were born, but nobody has gotten around to reforming them because nobody has really taken a good look at the fact that it is a plastic body and therefore can be reformed. Now, let's look a little deeper and realize that this body of ours can be reformed by virtue of the fact that it is a consolidation of segments. It is not a solid something. It is not a tree trunk. It is not a cylinder of steel."
From the 1973 Big Sur advanced class, extending the definition toward reform:
Twenty-five years ago no one would have believed this
Ida was acutely aware of how radical the plasticity claim sounded to listeners trained in earlier doctrines. The 1974 Healing Arts lectures contain a remarkable aside in which she imagines herself, fifty years earlier, being institutionalized for making the same statement she now makes routinely. The body has the property; the property is real; the historical accident is that the culture has only recently caught up with what the connective tissue can do. This is not a small remark. It locates the practice within a specific intellectual moment — the early 1970s — when the soft tissue work she had been doing for decades was finally being heard as a coherent proposition rather than as a quack claim. The passage below, drawn from the long exposition that precedes the dictionary definition, situates the doctrine historically and announces the doctrine's central rhetorical move: she will say it again and again.
"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. But the 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."
From the same 1974 Healing Arts lecture, on the historical strangeness of the claim:
The repetition is pedagogical. Ida understood that a claim this radical had to be heard multiple times before it would become hearable as a proposition rather than as rhetoric. Across the public tapes and the advanced classes, the same five-word phrase — the body is a plastic medium — recurs with an insistence that is almost liturgical. In the 1971-72 Mystery Tapes, in conversation with an interviewer who was working out how to introduce the practice to a lay audience, she gives the cleanest, most patient version of the claim. The interviewer had asked her to address the plasticity of the body explicitly. Ida obliged with the kind of careful, gratitude-inflected statement that suggests she had been waiting for the question.
"Well, why not Oh, oh, in the manipulation of the tissue relates to your idea about the plasticity of the body. Is that correct? Well, why not simply say I've heard a lot of people talking about the plasticity of the body when they talk about wrong. Okay. Good idea. I've heard a lot of people talk about the plasticity of the body when they're talking about Rolfing. Yes. There's no question that the body is a plastic medium, and this is a something which never was properly appreciated, let me say fifty years ago or until quite recently, that the body really is a very plastic medium. And fortunately, through the grace of our Creator, we were given the kind of material in our body which is plastic, which is able to elongate, to stretch, to change its position, and so forth."
From a 1971-72 interview preserved on the Mystery Tapes, the patient lay-audience version:
The two factors that make plasticity work
Ida's plasticity claim does not stand on the word alone. She derived it from two concrete structural facts about the body and pressed both of them on her students. The first fact is that the body is segmented — head, thorax, pelvis, legs — and the segments can move relative to each other because what holds them together is myofascial tissue, not rigid bone-to-bone fusion. The second fact is that the myofascial tissue itself is a particular protein, collagen, with a chemistry that responds to the addition of energy. Either fact alone would be insufficient. Together they make reform possible. The passage below, immediately following the dictionary definition in the 1974 Healing Arts lecture, walks the listener through both factors in sequence. The collagen molecule, she explains, is a braiding of three strands, held together by interchangeable mineral bonds. This is unusually technical for one of her public talks, and the technical detail is the point: she wants the listener to know there is a chemistry behind the claim.
"Two factors contribute to this: the first that the body, seemingly a unit, is in fact not a unit but a consolidation of large segments: the head, the thorax, the pelvis, the legs. The relation of these segments can be changed because the connecting myofascial structure is a structure of connective tissue of collagen. This is what that myofascial body is about. And collagen is a unique protein. The collagen molecule is a very large protein and it is a braiding of three strands a special braiding. These three strands are connected by various inorganic hydrogen sometimes, sodium sometimes, calcium sometimes, and undoubtedly other minerals. These minerals are interchangeable within limits. Thus, as the body grows older and stiffer, undoubtedly a larger percentage of calcium and a smaller percentage of sodium are present in these bonds. But by the addition of energy and what is energy?"
Continuing the 1974 Healing Arts lecture, naming the two material factors:
The collagen chemistry was the part of the doctrine Ida most wanted students to internalize, because it converted plasticity from a slogan into a mechanism. The body can be reshaped because collagen bonds can be altered, and collagen bonds can be altered because energy can be added to them. The next passage states the mechanism in its cleanest form — the practitioner's fingers or elbow are the energy source, and the connective tissue becomes more resilient and more flexible as a result. This is the sentence in which the doctrine connects to the practice. The practitioner is not metaphorically softening tissue; the practitioner is, in Ida's framing, doing chemistry.
"But by the addition of energy and what is energy? In this come in this context, it can it is the pressure of the fingers or the elbow of the ralpha. This ratio may be varied by the addition of this energy, and the joint or the connective tissue becomes more resilient, more flexible."
Closing the 1974 Healing Arts exposition with the mechanism:
In 1976, teaching the Boulder advanced class, Ida returned to the collagen mechanism with a different image — gelatin in water. She wanted the students to feel the chemistry rather than just hear about it. Gelatin is solid at room temperature, fluid when heat is added, and solid again when cooled. The collagen in the body behaves the same way: add energy, the tissue becomes fluid; the practitioner can then reposition it; the body sets into a new arrangement. This is the most concrete version of the mechanism in any of the recordings, and it served as her standard teaching analogy for the rest of her career.
"I mean that this protein collagen, which is the basis of all structure, has peculiar qualities, with your elbows. Don't let me catch you doing it with your knees. You can add energy to that collagen and as you add energy to it you can change the chemical structure. Just as you take some gelatin and water and it's semi solid, you put it on the stove and you add energy to it and it becomes a fluid. Same color, same gelatin, same water, little more heat. In other words, a little more energy, and it becomes fluid. You take it and you quickly set it in the freezer, and lo and behold, in no time flat, it's solid or semi solid. Now these are the this is the property of certain proteins, but not all proteins. But it is the property of collagen. And because you are mostly a collagen machine, it concerns you very intimately. Now that collagen actually changes its chemistry because collagen is a protein which is a weaving of three strands amino acids."
From the 1976 Boulder advanced class, the gelatin analogy:
Why reform — the gravity vertical
Plasticity is a means, not an end. Ida was careful to specify what she wanted the body reformed toward, because the same plasticity that allows reform also allows deformation, and a practitioner with poor judgment could do as much harm as good. The target is the vertical — the body's gravity line substantially coinciding with the gravity line of the earth. When the two lines coincide, gravity stops tearing the body down and starts supporting it. The passage below, which immediately follows the dictionary definition in the 1974 lecture, names the target with unusual directness. "Back to shape," in this practice, means vertical.
"Because only when the gravity vertical of the body substantially coincides with the gravity line of the earth can that energy field of the earth reinforce and augment the field of the human body. Then the energy of the earth contributes to the energy of the body. The body becomes vitalized. The flesh becomes resilient. Body functions of all sorts improve, for gravity at this point is the nourishing factor."
From the 1974 Healing Arts lecture, naming what reform aims at:
The 1976 Boulder class contains Ida's clearest warning that plasticity cuts both ways. The same property that allows the practitioner to reform the body also allows life — accidents, postural habits, nervous-system patterns — to deform it. Plasticity is morally neutral; the practitioner's intention is what determines whether the property is used to build up or to tear down. This is one of the few places in the transcripts where Ida explicitly names the dual potential, and it is essential to the doctrine. Without the warning, plasticity sounds like a promise; with it, plasticity becomes a responsibility.
"So that you see the body is a plastic medium as I think you've heard before And the point of the plastic medium is that you can break it down, you can knock it askew, you can distort it, you can almost break it apart, and if it is plastic, you can bring it together again. It's only when you get past the limits of elasticity that breaking that body down becomes final. And this is a possibility and you see it happening every day and the longer you're in Parkinson's the more you're going to see it happen. But what I'm trying to do for you people is to set you in the middle where you can look in both directions and see that mankind has options. It doesn't all go in one direction. It doesn't necessarily go in one direction."
From the 1976 Boulder advanced class, the warning that plasticity cuts both ways:
The production archive's cached response cites the following passage on this point. It is preserved here for the bibliographic continuity readers expect.
"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 chara"
Ida Rolf, advanced class.
The shopping bag — segmentation as the second factor
Of the two factors Ida named — collagen chemistry and segmentation — the second was harder for students to internalize, because it cut against the everyday experience of feeling like one continuous body. Her favored teaching device was the shopping bag. The body, she said, is not a tree trunk or a steel cylinder. It is a collection of bony segments held in an elastic sack, and the sack is what gives the practitioner something to work with. The good lord, she joked, didn't trust the dumb guys not to lose their parts, so he put them all in a shopping bag. The image was a joke that did serious work — it converted segmentation from anatomical abstraction into a vivid mental picture, and it located the practitioner's hands on the bag rather than on the bones.
"Now, let's look a little deeper and realize that this body of ours can be reformed by virtue of the fact that it is a consolidation of segments. It is not a solid something. It is not a tree trunk. It is not a cylinder of steel. It is a group of segments, one stacked on top of the other, and the whole thing bound in an elastic sack. I sometimes call it a shopping bag. I sometimes say that the good lord didn't trust these dumb guys. He was afraid they might lose some of their segments and he put them all into a shopping bag. And this almost literally is true. You see, those segments are really bony segments. And those bony segments are surrounded and are held in place by soft, so called soft tissue, flesh, muscles, eventually skin. The final thing is a skin shopping bag that keeps us where we belong. Now it is on the basis of this idea that you can begin to change the structure of human beings because that soft elastic tissue can be changed By the addition of energy to it, the position of that soft elastic tissue can be changed. And if it is, the position of the bones shifts. Now slightly, I'm not saying that you're going to take your arm and put it in between your leg and your torso."
From the 1973 Big Sur class, the shopping-bag image as the architecture of plasticity:
The shopping-bag image had specific teaching consequences. It oriented the practitioner away from the bones, which cannot be moved directly, and toward the soft tissue, which can. It also explained why integration was a question of relationship rather than of correcting any individual part. The segments are already there; what the practitioner is rearranging is how they sit against each other. In the 1975 Boulder advanced class, the trainers used the shopping-bag language explicitly to drill the architecture into new students. The fascia, they explained, is what organizes the contents of the bag.
"Okay, now you got the shopping bag. Right? Flexible bag. And in that bag, we're going across 42nd Street. 34th Street. 34th. 35th. And 7th Avenue. Now in that bag, you got a bunch of stuff. Let's put some brains in there, a heart, some bones. Throw in some glue. Now here's the key point. This is the bag with all this stuff in it, just like the body. What are you gonna do to organize that stuff? How are you gonna do it? Well, the fascial planes are the organizational material for the body. It's what I think. K. And if you look at it from an evolution standpoint, there's some massive protoplasm there. As that protoplasm gets more organized, in other words, higher structures come to be like a nervous system, the nervous system gets more organized."
From a 1975 Boulder training session, a senior trainer drilling the shopping-bag architecture:
Fascia as the organ of structure
Ida insisted that fascia was not a wrapping around muscle but the organ of structure — the tissue that determines the body's shape and the relationship of its parts. The medical schools, she told her 1973 Big Sur class, had never properly taught this. Anatomy texts treated fascia as the leftover material left behind after the interesting parts had been identified. Ida treated it as the primary subject. If you scooped out everything else from a body — the muscles, the organs, the chemicals that drive metabolism — what you would have left, in theory, is the supportive ball of fascia that holds the shape. This was the passage in which the plasticity doctrine met the anatomical doctrine, because if fascia is the organ of structure, then changing fascia is changing structure.
"And this is indicative merely of the fact that we are going into an unknown territory, a terra incognita, and trying to find out what changes in that body are going to develop into what changes in the personality that calls itself the owner of that body. 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."
From the 1974 Healing Arts lecture, the fascia doctrine connected to plasticity:
In the 1973 Big Sur class Ida pressed the structural claim further, naming fascia as the basis of structural integration's whole conception of what a body is. Structure is not metaphysical, she insisted — it is physics, taught in physics laboratories. The fascial aggregate is the organ of structure, and the structure in question is a set of relationships in three-dimensional space. The medical school doesn't teach this. The argument with the medics, she suspected, would be settled in the next century, after the soft-tissue work she was advocating had been replicated in enough cases to make the point. Meanwhile, the practitioner's job was to take the organ of structure — the fascia — and modify it through the addition of energy.
"Now the strange part about it is that that organ of structure is a very resilient and very elastic and very plastic medium. It can be changed by adding energy to it. In structural integration, one of the ways we add energy is by pressure so that the practitioner gives deliberately contributes energy to the person on whom he is working, to not energy in the sense that you let a position throw it around, but energy such as they talk about in the physics laboratory. When you press on a given point, you literally are adding energy to that which is under that point. And in structural integration, by way of an unbelievable accident of how you can change fashion structure, you can change human beings. You can change their structure and in changing their structure you are able to change their function."
From the 1973 Big Sur class, naming fascia as a plastic medium with chemistry:
Michael Salveson, one of the senior figures in Ida's 1973 Big Sur class, extended the fascial doctrine in a direction Ida endorsed but did not herself develop. The fascia is not only the organ of structure but a system of communication — a medium through which fluids, ions, and electrical charges traverse the body. This was an unusually forward-looking observation for the early 1970s, when most fascial research had not yet begun. Salveson framed it carefully, as a working hypothesis, but Ida let it stand in her class. It extended the plasticity claim from mechanical reformability into something closer to a biological communication channel.
"But you are also dealing with a very delicate and sensitive environment in which other cells that don't have a direct structural significance live and which can be strongly and powerfully influenced by the manipulation of the fracture. For example, it is common knowledge that often times infections will migrate along the fracture planes. Fluids traverse along the planes. And when Ida talks about the body being basically an electrical something, it is also along fascial planes that these ions need and electrical charges are transmitting. So that you begin to get a feeling that it is literally another system of communication in the body. There is a way of organizing the body. For this we have the nervous system. There is a circulatory system which is another way of providing information chemicals pass through the circulatory system and information gets delayed. You can look at the fascial system in a similar way. There is a fluid system in the fascia and you see this, we had a woman yesterday, we had, where you have fluid collected in the legs. And you can literally see that once those fascial planes unstuck from each other, that fluid starts to leave and that the mechanisms that are there for the removal of that fluid can start to work. It is through the fact that that happens. It is that extrinsic fuel to which it is outside the central nervous system."
From the 1973 Big Sur class, Salveson extending fascia into communication theory:
Energy added — what the practitioner does
The most consequential consequence of the plasticity doctrine, for Ida's teaching, was that it specified what the practitioner was doing in physical terms. The practitioner was adding energy. Not metaphorical energy, not subtle energy in the eastern sense — energy as the physicists used the word, transferred through pressure into collagen bonds, sufficient to alter the chemical state of the tissue. This framing put Structural Integration on a different footing from contemporaries like Reichian work or polarity, both of which Ida respected but considered to be working with different mechanisms. Her practitioner was a mechanic in the engineering sense, applying calculated force to a measurable material. The passage below makes the framing explicit.
"And anytime you want to get into an argument with your medical through they'll realize that this is so. It is the fascial aggregate which is the organ of structure. And the structure basically the word, where we use the word structure, we are referring to relationships in free space. Relationships in space. There's nothing metaphysical metaphysical about it. It's pure physics as it's taught in physics laboratories."
From the 1973 Big Sur class, structure as relationships in physical space:
Ida's emphasis on energy as a physics term made room for her colleagues to begin measuring what the practice produced. Valerie Hunt, the UCLA physiologist who became one of Ida's most important laboratory collaborators in the 1970s, took the energy framing seriously and ran electromyographic studies on bodies before and after the ten-session series. Her findings, reported back to Ida's students in the 1974 Healing Arts class, confirmed that something measurable was happening at the neuromuscular level. The practice was not a placebo; it was producing a quantifiable shift in how the nervous system controlled movement. Hunt's vocabulary — frequencies, energy fields, coherency — gave the plasticity doctrine a scientific extension that Ida welcomed.
"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."
From the 1974 Healing Arts lectures, Hunt connecting verticality to neuromuscular measurement:
What the practitioner feels under the hand
The plasticity doctrine had a phenomenology as well as a chemistry. Practitioners working with Ida's method consistently reported a specific sensation under the hand — a warming, a melting, a moment when stuck tissue began to move. Ida did not insist on a single technical explanation for this sensation; she let her senior students articulate it in their own terms. In the 1974 Open Universe class, one of her trainers described what he experienced when the fascia released. The description has the texture of empirical observation rather than doctrine — he was reporting what he felt, and the feeling matched what the plasticity doctrine predicted.
"Again, we're interested in gravity falling falling through this body in such a way that it's doing a lot of the work. Can you say again what you're doing between the layers and muscles physiologically? You know, all I know is what I experienced and that is that oftentimes there's a warming, like a melting feeling that the place that was stuck or the place that wasn't moving, all of a sudden it gets warm and starts moving. That's my point. You're moving something. They get stuck partially by hardening or there's a fluid substance that seems like that has been hardened and isn't reabsorbed in the flesh. Time of injury, time of sickness. And it seems like whatever it is that is that stuckness between the layers of the fascia is what's reabsorbed at the time when our pressure is or energy is is placed on the body. And I don't know what further to say except that that's the way I feel what's going on. And, of course, the development of that stress pattern or of those places that are immobilized and hardened, we think is primarily related to the way the body deals with gravity because gravity is the most constant environmental force for the human body. And so it's in response to gravity that the body avoids pain, you might say, or avoids the buildup of stress in an individual point by trying to distribute it."
From a 1974 demonstration class, a senior trainer naming what release feels like:
Another senior figure in the same class, the practitioner identified in the recording as the one working on the client, described the moment of release as something more than mechanical softening. The tissue, he said, seemed to choose to move — to start moving on its own after a certain moment of contact. This is not language Ida herself would have used, but she let it stand in her class, because it matched the phenomenology her trainers were reporting consistently. The plasticity doctrine had a felt counterpart, and the felt counterpart had a recognizable signature: warmth, movement, the unsticking of layers.
"the tissue responds, I don't know how to say it anymore words. It's who's asking the question? I know it was, like, to your fingers. I feel it start moving is the primary thing. It's like he chooses to move. Like, I put my hand where the tissue is stuck, and it begins to move after a certain moment. Is that what it feels like to you two right now? Is it hurting? Bob, No. Do you always choose one place to start, or is that sort of instinctual? It is instinctual, and generally in the first hour, it's somewhere in this area where I am now."
From the same 1974 session, the trainer describing tissue that begins to move on its own:
Plasticity and growth — the body that wants to climb a tree
Ida sometimes pressed the plasticity doctrine in an unexpected direction — toward developmental biology. The body is plastic not only because the practitioner can reform it, she argued, but because the growing child constantly reforms it through desire. A boy wants to throw balls, to fight with his fellows, to climb a tree, and the desire keeps edging him outward until his body builds the muscular patterns required to satisfy it. Growth is itself a process of plastic reformation. The practitioner is doing, in adulthood, what desire was doing in childhood — recruiting the body's capacity to reshape itself in response to demand. This passage, from her 1973 Big Sur class, locates Structural Integration within a larger biological story about how living tissue adapts at all.
" There is a man child down on this earth who wants to throw balls, who wants to fight with his fellows, who wants to climb a tree, who wants to do all kinds of things, and whose desire keeps edging out toward us. And he cannot attain this desire until the day comes when he creates new muscular patterns or more muscular patterns and the greater muscular stress evokes an answer from the body"
From the 1973 Big Sur class, plasticity framed as the engine of growth itself:
The implication of the growth framing was significant. If plasticity is the engine of growth, then Ida's practice was not introducing a foreign mechanism into the body. It was working with the same property that had built the body in the first place. The practitioner's pressure, in this framing, was a substitute for the developmental demand that had originally shaped the tissue — a way of asking the body to respond, in adulthood, the way it had responded in childhood. Plasticity in this sense was continuous with life itself.
The whole person — plasticity beyond the body
Ida was careful, in most of her lectures, to keep the plasticity doctrine grounded in material chemistry — collagen, fascia, energy, pressure. But she also acknowledged, especially in conversation with psychologically inclined interviewers, that the doctrine had consequences beyond the body. If the body is plastic, then the personality the body carries is also susceptible to reformation. She did not claim that working on the body necessarily produced psychological change. She claimed only that the two were not separate, and that an honest practitioner would attend to both. In the 1971-72 Mystery Tapes she answered an interviewer's question about the goal of the practice with characteristic care — the goal is the best possible use of the body, and incidentally of the mind.
"Wait a haven't asked you yet. Doctor Rolfe, can you explain briefly what is the goal of Rolfe? Well, in the broader sense, of course, what we're trying to do is to give an individual the better, the best possible use of his body and therefore, incidentally, of his mind. But, of course, the answer to that is as we see it, that we must bring a man or a woman, a human toward the vertical. It is only when he is related to that vertical stance that I described before that he is able to have the best use of his physical body and its appurtenances, a mental body and an emotional body, if one wants to use those metaphors. And this, of course, is what we have in mind to produce. In other words, what we are saying is, what we are claiming is that we can bring any man much nearer to the vertical. And that is where the head is when he to the vertical, he looks at us with amazement and he says, I feel so much better. I feel so much lighter. I move so much better. I do so much more work."
From a 1971-72 interview, Ida stating the goal of the practice:
Throughout the Mystery Tapes Ida returned to the formulation that the practice was a personal treatment rather than a body treatment — that while her hands worked on tissue, what she was producing was a change in the person who lived in the tissue. This was not mysticism. It was the natural consequence of the plasticity doctrine combined with the conviction that body and personality are not in fact separable. If you reshape the material, you reshape what the material carries. Plasticity does not stop at the skin because the personality does not stop at the skin.
"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. Well, why not Oh, oh, in the manipulation of the tissue relates to your idea about the plasticity of the body. Is that correct? Well, why not simply say I've heard a lot of people talking about the plasticity of the body when they talk about wrong.
From the same Mystery Tape interview, on plasticity as the basis of the whole practice:
Plasticity in the practitioner's training
In the 1975 Boulder advanced class, Ida's senior trainers drilled the plasticity doctrine into new students as part of the basic definition of the practice. The doctrine had become foundational to the curriculum: every trainee had to be able to articulate it before being allowed to work. The passage below, from a Boulder training session, shows the doctrine being passed down in conversational form, with Ida present and intervening. It is one of the few places in the recordings where one can hear the doctrine being taught rather than declared — students rehearsing the language, Ida correcting and refining as they go.
"Structural integration is a process. Which we the use of structural integration as a process in which we use deep tissue, deep soft tissue manipulation and education to arrange the tissues of the body along vertical and horizontal lines of gravity so as body to experience a harmonious relationship with gravity. Okay. What would you say about that? I would say structural integration is a system that looks at the body as a structure in terms of blocks. The head, thorax, pelvis, lower extremities. Right. That's a very important point. You want to have every time you define structure integration. Go ahead, Steve. And also, what happens to these blocks is that they, through time, begin to lose their alignment in respect in relationship to one another. Okay. It's not time doesn't do it. That happens through time. Right. Well, that's what I was trying say through time. And what happens when this unalignment occurs is that the body loses its relationship to gravity. And what the structural integrationist attempts to do is to realign the structure and teach the individual how to be aware of the relationship with gravity. Realigns the the basic blocks so they're aligned within the gravitational field."
From a 1975 Boulder training session, the doctrine being rehearsed by students under Ida's supervision:
Later in the same class, the discussion turned to the doctrine's foundational assumptions. Don Sandburg, one of the participants, articulated the doctrine in the form Ida endorsed as her favorite: the body is plastic and can be reorganized. The exchange below shows the doctrine being stated as an explicit working assumption of the practice — not a slogan but a premise on which everything else depended. If you do not accept that the body is plastic, you cannot do the work. Ida's senior trainers had absorbed this lesson and were teaching it to the next cohort.
"Shall I repeat that Don said then the muscles begin to be used as structural components instead of motor components. Okay. Now the other other assumption that we have to make in order to be able to do what we do is to assume that the body is plastic and that it can be reorganized back or forward, I'm not sure which it is, into"
From a Mystery Tape discussion of foundational assumptions:
Coda: the body that can be changed
The plasticity doctrine, taken as a whole, is what allowed Ida to claim that her practice was something other than therapy. A therapist treats symptoms; an integrator reshapes the substrate from which symptoms emerge. The substrate can be reshaped because it is plastic. The shaping is targeted because verticality is the goal. The mechanism is chemical because collagen responds to energy input. The energy comes from the practitioner's pressure. Each of these claims is technical, each is defensible, and each is articulated in Ida's own voice across the recordings of her advanced classes and public lectures. The doctrine is not decoration. It is the load-bearing structure of the practice.
"It is a situation where you have to do a great deal of studying, a great deal of understanding about how these segments of the body are held together, and even more important, how these segments of the body are held apart before you are ready to try to change a body. But to me, I never worked with a body without getting a thrill. And my thrill comes from the recognition that you can change a body. And you can do it in relatively very short time. Our standard practice is to work with people for about ten hours. At the end of that time, we know that if we've done our work properly, these bodies are balanced in terms of their muscular components. They are balanced right side against left side and front side against back side. But most important of all, they are balanced outside against inside."
From a public talk, Ida's most direct statement of what plasticity makes possible:
Ida's last word on plasticity, in the chunks that compose this article's source pool, was characteristically practical. She returned again and again to the relationship between structure and posture, insisting that the two could not be separated. Posture is what you do with structure. Change the structure and posture changes by itself, without exhortation. This was the everyday consequence of plasticity, the consequence that ordinary clients reported in the days after their sessions. They did not feel they had been corrected. They felt they had been made available to themselves. That availability is what plasticity, properly understood, makes possible.
"Posture is what you do with structure. Structure is the way you relate parts of the body to each other. 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. And you get the kind of ease and the kind of vitality that you have seen some of your friends get who have gone through this system of structural"
From a public talk on the relationship between structure and posture:
See also: See also: Ida Rolf, RolfB3 public tape (RolfB3Side1) — Julian Silverman's mathematical extension of the plasticity doctrine into thermodynamics and energy-flow modeling, including a model of joints as energy sources with viscous and elastic components. Included as a pointer for readers interested in how the doctrine was formalized by Ida's scientific collaborators. RolfB3Side1 ▸
See also: See also: Valerie Hunt's full report in the 1974 Healing Arts lectures (CFHA_03, CFHA_04) — extended laboratory data on neuromuscular changes following the ten-session series, including frequency analysis of motor unit activity and observations on baseline bioelectric shifts. The reports give the plasticity doctrine its most rigorous external validation from the period. CFHA_03 ▸CFHA_04 ▸