Is Active Muscular Extension Possible?

©Copyright 2008 by Robert Chuckrow (revised on 10/14/15)

We will explore the hypothesis that muscles can actively extend, namely, that the fibers composing muscle groups can lengthen under the action of neural stimulation. I have experimented with this hypothesis over half of the 79 years of my life and am now convinced of its truth. Until recently, the evidence was mainly experiential, but now it is also supported by ongoing scientific research at Washington State University, led by Dr. Gerald Pollack. That research on cellular action provides a mechanism by which muscles can lengthen that corresponds closely to what I and others experience and what I have been describing for decades.

First, I will explain how I was introduced to the concept of active muscular extension (AME). Next, I will respond to questions that have been posed to challenge the hypothesis. Next, I will provide some experiential evidence for AME. Then, I will summarize a possible mechanism for AME.

I started my study of Kinetic Awareness® (KA) in 1974 under Elaine Summers (1925–2014). KA is a system of natural movement and self-discovery originated by Summers and includes the concept that muscles can actively extend. Summers called this phenomenon extension tension. Much of her work in fine-tuning movement and helping injured dancers recover was based on this concept. It turns out that moving slowly in a manner based on the extension of muscles has great healing benefit.

Decades ago, I began to realize that AME was the key to what in T’ai Chi is called jin or “correct strength” (as opposed to li or “awkward strength”). Read the article on Peng, Jin, and Li. This realization greatly expanded my progress in T’ai Chi.

In my book, Tai Chi Dynamics,1 which was published in July, 2008, I stated the hypothesis that muscles can actively extend and utilized that concept to explain natural and reverse breathing and also the important distinction between li and jin. Moreover, I applied that concept to a number of other often-elusive T’ai-Chi applications. I stated then that I experienced muscular extension as hydraulic pressure wherein a change in pressure at any part of the body is transmitted to every other part of the body.

Shortly after publication of Tai Chi Dynamics, reviews of it appeared that asserted the scientific impossibility of AME. It was stated that muscle-cell activity is fully understood and that it is impossible for muscles to actively extend. I was able to answer questions challenging the possibility of AME, but at that time, only experiential evidence was available, and a satisfactory physiological mechanism for AME was lacking. I have recently learned of a promising mechanism, which is summarized later in this article.

The Current View of Muscular Action
The current view is that (a) muscular action results solely from the contraction of muscle fibers along their length; (b) the contraction of muscle fibers is activated by neural impulses from the brain, spinal cord, or other muscles; (c) muscles are arranged in opposing pairs; and (d) the contraction of a muscle on one side causes the muscle(s) on the other side to elongate (extend).

The following discussion agrees with the above view except for the word solely. Instead, it advances the hypothesis that there is an additional way in which muscles elongate (other than solely by the contraction of opposing muscles); that is, contraction is not the only feature of muscular action, and muscles can actively extend.

Questions and Responses to Them
How can it be that there is a new mode of muscular action when the mechanism of muscular movement is well described in cellular and molecular biology?

Not everything is known about the physiology of muscular action. Moreover, throughout the history of science and medicine, phenomena have periodically been found that were originally thought to be impossible, and new ideas and concepts have replaced old ones.

Only extensive scientific investigation can rule out the possibility of something. Thus, nowadays, scientists make a statement of the impossibility of something very cautiously and only after extensive and objective study of the allegedly impossible phenomenon. The large number of phenomena previously thought to be impossible—but later found not to be so—prompt scientists to express doubt, skepticism, or curiosity instead of automatically characterizing something that is outside the current conceptual framework as impossible.

Even if such a muscular extension could occur, it would mean that the muscle would have to exert force to the bones by pushing the bones with the use of the tendons. A tendon is like a cable, which is good at pulling, not pushing. How can a tendon push?

A cable can exert a pushing force. Cables are used to exert pushing force in machinery and automobiles. A cable can push if it is enclosed in a sheath that keeps it from buckling. In the human body, tendons lie within tunnels consisting of highly resilient tissue surrounding them. That tissue keeps tendons, which are not along straight lines, from undergoing any lateral movement— either straightening (“bowstringing”) or buckling—thereby enabling them to pull or push bones.

If AME is so powerful, why are all axial skeletal muscles arranged in opposing pairs? Why not a single muscle that can do both active contraction and extension?

An analogous question can be asked of why we have two eyes, two nostrils, two ears, two kidneys, two testicles/ovaries, etc., one on each side, when one will do. The answer is that functional redundancy is common in the human body. Having eyes and ears on both sides adds the perception of visual depth and auditory directionality. Similarly, having opposing muscles provides much greater strength and more movement options. Most of us fall far short of our full movement potential. One of the very purposes of studying T’ai Chi and similar arts is to learn to utilize and cultivate unconventional movement options.

If AME is possible, wouldn’t it be possible to do a pull-up without using the biceps, and wouldn’t not being able to do a pull-up without using the biceps rule out any possibility of AME?

A pull-up involves a highly localized, large-range muscular action requiring large amounts of strength. In contrast, T’ai-Chi movements involve small movements of each individual part, with all body parts unified. Not being able to do a pull-up without using the biceps would not rule out the existence of AME. It would only mean that not every action can be done with AME alone. Some actions such as pull-ups may well require utilizing both AME and contractive muscular action.

Some Experiential Evidence for AME
Note: To maximize the desired effect in the following explorations, it is important to (1) relax the part being moved as much as possible; (2) then imagine movement while in a relaxed state without doing any actual movement, which sends neural electricity to the part imagined; (3) feel the state achieved in (1) and (2) and capture that feeling; and (3) only then do actual movements while recreating the feeling attained.

Trying these exercises (some of which are described in Tai Chi Dynamics) should, at the very least, lead you to be skeptical of the conventional idea that muscles cannot extend:

1. Opening Your Hand. Sit or stand in as relaxed a manner as possible. Hold your arm in front of you such that your relaxed hand is about 12 inches from your body. Imagine that you are holding a balloon in that hand and that the expansion of the balloon is opening your hand. Remember that it is important not to do any actual movement at first. Then, slowly open your hand a tiny amount, paying special attention to the feeling of the palm of the hand and the inside of the forearm as compared to its back and the outside of the forearm. See how open you can make your hand without losing the feeling just referred to. Once you are familiar with this action, try the following other way: Open your hand by pulling it open with the muscles that attach to the back of your hand. Again, as your hand opens, pay special attention to the feeling of the palm of the hand and the inside of the forearm as compared to the back of the hand and the outside of the forearm. See how open you can make your hand without losing this new feeling.

Compare the difference in feeling between first and the second ways of opening your hand. Moreover, the first way results only in opening the hand but not straightening your fingers whereas the second way results in your fingers actually being bent backwards (hyperextended). Last, compare the feeling of ch’i in the two hands for both ways. I think that you will find the first way provides much more ch’i.

It might seem that you can’t open your hand as much the first way because you are stuck with the image of a balloon opening it, and a balloon is always convex. Actually, the image is only a way of identifying the feeling of a different way of using your muscles. Once that feeling is experienced—and it may take quite a few tries before it is—you can throw away the image and work only from the feeling.

2. Opening the Space Between Your Fingers. Repeat the elements of the previous exercise, this time opening the space between your fingers.

3. Extending Your Hamstrings. Stand with feet parallel. Lean forward and let upper body hang from your hip joints, knees somewhat bent. Relax the head, arms, and back as much as possible. Next try lifting the pelvis in two different ways. One way is to push the knees back, causing your legs to straighten. In this case, the muscles on the back of the legs are forced to lengthen by the contraction of muscles on the front of the legs. This is the conventional way of moving. The other (unconventional) way is to extend the legs by lifting the sitz bones (the two bony lobes of the pelvis that rest on a chair while sitting). In this case, the muscles on the front of the legs are not actively involved. Instead, the muscles on the back of the legs lengthen by their own action. Notice that in the second way of moving, the legs do not totally straighten, but in the first case they do.

4. Extend Your Hamstrings Again. Lie on your back on the floor, knees up. If you need to, place a pillow under your head to achieve an optimal alignment of the cervical vertebrae. After attaining the most-relaxed state you can, slowly lift one knee, balancing that leg on the pelvis, relaxing it as much as possible, and feeling the weight of your leg resting on the pelvis. Next, slowly extend the heel upward. When you start to feel resistance, that is your working point. The goal now is to ease your heel upward without tensing the muscle on the front of your leg but by extending the muscles on the back of your leg. That is, the muscles that are getting longer are doing so at their own rate rather than being bullied by the opposing muscles. Should you start to feel the knee clench, you have substituted contractive movement for AME.

5. Extending Your Hip Adductors. The hip adductors are muscles on the insides of your thighs, which when contracted bring your knees together. Lie on your back on the floor, legs straight out, with heels touching each other. If you need to, place a pillow under your head to achieve an optimal alignment of the cervical vertebrae. Without moving your pelvis or the heel of one foot, extend that knee horizontally a tiny amount away from the axis of your body. Even if you have trouble at first, you should be able to eventually learn to move your knee an inch or so in this manner.

It is hard to accept that contracting a muscle (which shortens it) can accomplish moving your knee away from the axis of your body without your foot or pelvis moving. That action involves lengthening only. Next, feel the muscle on the inside of your left thigh, and notice that it is activated and lengthening when you move your knee outward that way. Then feel (or have another person feel) the muscles on the outside and bottom of your left thigh. Those muscles should be totally relaxed. In doing this exercise, you should also be able to feel that your left thigh joint is actually opening slightly. Can there be a way for any of these things to happen by contracting (shortening) muscles?

6. Extending Your Abdominal Muscles. Experiment with your abdominal muscles by contracting or expanding your lower abdomen. You can do both of these actions just by using the same set of muscles and no other ones.

7. Extending Your Sphincter Muscles. When you move your bowels or urinate, pay attention to what you do with your sphincter muscles, which are normally relaxed but taut. When you excrete, you extend these muscles and can directly feel that extension. Next, try contracting these same muscles. Note the difference in the feeling.

8. Extending Your Diaphragm. Feel your diaphragm expand upward and outward when you cough or breathe out sharply.

9. Extending Your Trachea. Feel your trachea (wind pipe) expand when you breathe in—and even more so when you yawn.

10. Extending Your Nostrils and Nasal Passages. Feel your nostrils flare and your nasal passages expand when you inhale.

11. Extending Your Head Upward. While standing in your best, relaxed posture, extend your head upward by creating subtle expansion of the space between the cervical vertebrae. The movement should be almost microscopic.

12. Tilting Your Head Sideways. While standing in your best, relaxed posture, tilt your head two ways One way is to pull your head to the side by contracting the muscles on the side toward which your head is tilting. That way forces the muscles on the other side to lengthen. The other (unconventional) way is to extend the muscles on the side that is getting longer and just relax the muscles on the other side.

A Promising Mechanism for AME
Dr. Gerald Pollack has been directing research on cellular phenomena at Washington State University for decades and has discovered an important feature based on the restructuring of water under certain conditions (see video on some unusual aspects of water). Our cells are primarily water, and his research indicates that neural electricity can restructure water in cells, resulting in their expansion and the consequent lengthening of muscles (read a review of one of Dr. Pollack’s books, Cells, Gels, and The Engines of Life).2

For the past year, I have been experimenting with Dr. Pollack’s research. The concept of water in the cells expanding is quite satisfying because it closely matches what I experience with AME; namely, I feel as though I am sending neural electricity to my muscle cells, and it feels as though the water in those cells is expanding as a consequence. In fact, I experienced those effects for quite some time and described them in similar terms before learning of Dr. Pollack’s research.

In Closing
Any questions, comments, or references to scientific articles that shed light on AME will be welcome (email: rmp at bestweb dot net).

1Robert Chuckrow, Tai Chi Dynamics, YMAA Publication Center, Wolfeboro, NH, 2008, pp. 1–23.

2Gerald H Pollack, Cells, Gels, and the Engines of Life, Ebner and Sons Publishing, Seattle, Washington, USA, 2001.

Related Article: Cultivating the Correct Internal State in T’ai-Chi Movement

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