Mula Bandha Anatomically Speaking by David Keil © 2010

David Keil Anatomy, Torso, Yoga 10 Comments

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Understanding Mula Bandha

The bandhas (mula bandha specifically) are perhaps the most difficult aspect to grasp in the practice of Ashtanga Vinyasa Yoga. For me personally, I think I know what they are. But then I look back at my little life as an Ashtangi, amazingly at 11 years now, and realize, I thought I knew what they were 10 years ago. Then just 5 years ago I understood them even more differently than I do today. My experience of them has changed over the years and will continue to as I’m guessing your experience of them will.

As an anatomy teacher I do try to bridge the gap between the subtle esoteric aspects of the energetic system and the practice of yoga and put it into western terms of anatomy. In the area of bandhas, I am careful not to make it too strongly into a physical anatomical thing. Instead, I acknowledge that bandhas are both, energetic and physical as is our entire body. We are not just energy, not just emotions, not just spiritual, not just thoughts, not just physical, but all of these at once.

To discuss mula bandha we need to talk about the pelvic floor. Specifically, some people say when talking about mula bandha we should direct our attention to the Perineum and others use the term PC muscles which stands for Pubo-Coccygeal muscles. This web of tissue at the base of our torso container is actually a diaphragm – defined as a ring of tissue. The opening at the base of our bowl shaped pelvis is more or less circular and filled with thin layers of muscles and fascia, creating a trampoline of tissues. Like many other places in the body, the pelvic floor is layered. Technically the perineum lies under the pubo-coccygeal muscles with a layer of fascia between.

mulha banda yoga anatomyContraction of these muscles is often associated with the mula bandha. Great debate comes from whether you should be contracting the middle or the back portion of these tissues and far be it from me to jump into this one too deeply, other than to say, Sri K. Pattabhi Jois always talked about controlling your anus. The translations that I’ve seen of the Hatha Yoga Pradipika, which has an entire chapter on bandhas and mudras, often say the same thing. That is, mula bandha is a contraction of the anus.

As it turns out the PC muscles are actually part of the levator ani, which means elevator of the anus. Technically this would be more closely related to what we’re after. Therefore, to this anatomist, it makes more technical sense to use PC. But that’s just me. In the end, what matters is that you have the experience of what is created, not the technical details.

If the bandha is an energetic component of who we are, what part does the actual muscle have to do with the bandha anyway? Personally, I describe the pelvic floor and contraction of it as the pathway toward mula bandha. In other words, it’s the physical contraction that does two things. First, it creates a conscious mental relationship with mula bandha and it seems that prana follows thoughts, so if you’re thinking of a part of your body, you are in essence sending energy there. Second, it is the contraction of the PC muscles which stimulates the energetic center, hence, creating the mula bandha.

There are, of course, physical changes that occur when performing a contraction of the pelvic floor muscles. They often fit into the descriptions given of the core muscles. There are debates about what the core muscles are, which ones should be included etc., but the pelvic floor is almost always part of that conversation. Remember that the pelvic floor muscles are at the base of the spine filling the circular like hole at the bottom of our pelvic bowl. The back portion of the bowl is created by the sacrum which links to either side of the pelvis at what we call the SI (sacroiliac) joint. Just off to either side of the sacrum, in essence filling in the sides toward the back or the bowl, are the piriformis muscles.

Think of the spine rising up out of the back of the pelvic bowl, towering above its foundation at the pelvis, almost like balancing a broom upside down in the palm of your hand. Certainly there are other muscles that help stabilize this column as it rises, but at its base, its foundation, are the PC muscles. To see the effect of these muscles in helping balance the spine, imagine for a moment that you tightened your PC muscles so much that it started to make your coccyx touch your pubic bone (not possible by the way). If the coccyx, and therefore sacrum are moving toward the pubic bone it means that there is movement at the SI joint and the spine is falling backwards above the SI joint.

If the muscles let go completely then the opposite would happen. If there was no tension to hold the sacrum in place, the towering column of the spine would start to fall forward and the coccyx would be moving away from the pubis. The point is that the PC muscles help to create stability of the pelvic bowl and the spine that rises from it. Of course, no muscle, or in this case group of muscles, lives in a vacuum. There are other muscles (and ligaments) that help maintain the integrity of the pelvic bowl and the stability of the spine, it’s just that these muscles are at the foundation of it. Therefore, physically, these muscles are about stability and support of pelvis and spine, and perhaps, root the spine, or are at the root of the spine. Mulha = Root.

There is another effect that happens when contracting these muscles. You should find that lowest part of your abdomen also changes in tension. You should be able to feel this yourself quite easily, especially on a strong contraction of the PC muscles.  You may want to close your eyes for a moment and do a few contractions of these muscles to see what other parts around the area contract. People may experience it slightly differently. Some may even feel a contraction in their lower back as well between the top of the pelvis and ribs which would most likely be a result of the transverse abdominis (the deepest of the oblique muscles) as it connects to the vertebrae in the lumbar.

There is still one more direction to go with this interlinking of subtle and gross aspects of mula bandha and the pelvic floor. What better force to interlink them with than breath. You might say that breath is the ultimate link between subtle and gross. It’s most subtle aspect as Prana or life force animates our physical bodies. This feeds us both energetically and then if we take just the smallest of steps toward gross, prana presents itself in the form of oxygen molecules which nourish and sustain all of our more gross tissues, be they nervous, muscular, or skeletal. Everything in the body relies upon it.

When the diaphragm contracts it compresses the abdominal contents and puts a downward pressure on the pelvic floor and if unrestricted, also pushes the abdomen out. You can give it a go yourself by closing your eyes and take a big breath or two. You should feel the further you go to the edges of your inhalation that there is more and more abdomen moving and pressure into the pelvic floor.

The diaphragm above is putting pressure on the diaphragm below (PC). The energetic purpose of mulha bandha is to prevent the escape of energy, specifically apana vayu or downward flowing energy. By contracting the pelvic floor muscles you prevent the downward movement of these muscles when breathing. You are literally stopping a downward physical force, which is the gross side of the subtle purpose of mulha bandha.

You can read more on the physical and energetic qualities of mula bandha on pages 153-155 (1st ed.) of my book Functional Anatomy of Yoga.


I’d love to follow this thread and tell you all about the muscle that is most likely associated with uddiyana bandha and the effects on breathing there, but it would be off-topic. You’ll just have to demand another guest post from this yogi bent on anatomy.

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Comments 10

  1. Pingback: - Yoga Anatomy article about uddiyana bandha | Yoganatomy

  2. Pingback: - Yoga Anatomy yoga breathing leading to bandhas | Yoganatomy

  3. David, thank you from Moscow for what you’re doing. Being your colleague, teaching hatha yoga and anatomy on teachers cource, I appreciate your job highly.

    Please note that you have a little misprint in this article.You write: “The energetic purpose of mulha bandha is to prevent the escape of energy, specifically prana vayu or downward flowing energy.”

    Downward – is the route of Apana, Prana is flying upwards. 😉

    1. Post


      Thank you for catching that. Can you imagine how many people have read this over the last few years and no one pointed it out!? Correction made.

      Good luck in all your endeavors teaching anatomy and yoga.


  4. David,
    I suppose it’s generally hard for people to point out a mistake or misprint to a teacher they esteem. I’m in yoga for 11 years – still I checked this several times before writing. =) Ego doesn’t like to look stupid then it points out a mistake to somebody – and it happens to be IT’S own mistake and not of that other person.

    Ok. It is not about the topic of your article – but about the topic of correcting misprints (I’m a bit crazy about that;)). Look:

    “Sign up for our Newsltters

    Sign up to receive regular email newsletters from YogAnatomy including the latest articles from david Keil, upcoming workshops and product updates”

    Here I don’t have a slightest doubt from the beginning. It’s better to have “NewsLetters” and “David” instead of “Newsltters” and “david “.

    All the best to you and your family. 😉

  5. Great article – thank you.

    I’d like to mention that for some people with chronic pelvic pain (both males and females) the PC muscles are actually too tight and to contract them will make the problem worse (till it’s corrected)

    It’s not talked about much as there seems to be a belief in popular culture that everyone needs to strength these muscles either through yoga or Kegels etc.

    Manual internal massage therapy can remove trigger points and stretch the PC muscles and once this is fixed and the person is pain and symptom free it would then be safe to contract the PC muscle

    1. Post

      Hi Andrew,

      Thanks for adding to the conversation. It’s true, although you used the word… “some people” I’m not sure what percentage of yoga practitioners have this as a problem. Perhaps you should shed light on symptoms associated with an already overly tight pelvic floor and where you got your info if you like for others who read this article and comments.


  6. Hi David

    Thanks for the reply. The best reference work on this topic would be Chronic Pelvic Pain and Dysfunction: Practical Physical Medicine by Leon Chaitow and Ruth Jones, and A Headache in the Pelvis” – David Wise & Rodney Anderson (contains the Stanford Protocol)

    As far as symptoms go there are standard lists of symptoms out there along the lines of all kinds of pain the the pelvic, genital and low back area, symptoms of cystitis without true infection, needing to urinate at night, symptoms of prostitis, Vulva pain, stress incontinence, bowel problems like IBS or constipation etc etc

    But a simpler way of putting it would be any symptoms in the pelvic area that are persistent (and sinister causes ruled out) it would be worthwhile to get a pelvic floor assessment. The prevalence of the condition is hard to assess as there aren’t any good studies as the condition is not well appreciated by most medical doctors and complementary therapists, though hopefully the research at Stanford will start to change that. There is still a bit of a meme out there that any problems in that area mean you need to do Kegels or “strengthen” the pelvic floor (these can be helpful once properly assessed and treated)

    I’m no expert in yoga at all and think it could be argued both ways that on one hand due to practice the pelvic floor possibly could become overly tight yet equally that practice could soften and relax the pelvic floor. I’ll defer to your better knowledge on that 😉

    Hope all this is useful, if you need me to post a bit more please ask.
    Best wishes

    1. Hi David & Andrew,
      Thank you Andrew for raising awareness about pelvic floor dysfunction via too-tight pelvic floor. The standard TX for PFD has always been kegels but more current research indicates this can be counter-productive for those that suffer as a result of too much tension. Relaxing the PF muscles, strengthening the glutes, finding proper alignment, not sitting so much are all effective at helping this condition which isn’t rare just often misdiagnosed.
      For more info i found these sources helpful: Katy Bowman, Amy Stein. Elle magazine Sept. 2013 issue pp.528-530. These are just a few. Thanks!

  7. Very interesting indeed!
    I am reading ‘Anatomy of Hatha Yoga’ by H. David Coulter, where on page 184-187 he points out that the fysical focus of Mula Banddha lies in the muscles of the urogenital triangle eg the ischiocavernosus, bulbospongiosus and the superficial transverse perineal muscles superficially and the deep transverse perineal muscles and the urethral sphincter deeper. Eventually one reaches the muscles of the pelvic diaphragm. The more delicate versions of mula banddha center around the central tendon of the perineum. In practicing meditation he advices to use a mula banddha cushion in front of the perineum and I really can value this advice in my own meditation practice.
    If the pelvis is tilted backwards the focus lies on the ashwini mudra; on pages 181-183 he points out that this is more focused on the anal sphincter.
    I guess there are more perspectives to look at the matter, but I’m still a bit puzzled.

    Ton de Bruin
    the Netherlands

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