Iliopsoas: The Superhero Muscle
The iliopsoas muscle has always deeply intrigued me. It’s shear size and length is impressive alone, but it’s function and purpose within the body is often a hotly debated one…
Some anatomists call it a “hip flexor”, having its primary purpose to move the legs during walking and running. However, this seems to only be the tip of the iceberg with much of its function being shrouded deeper beneath the surface deep within the body. I like to look at the iliopsoas as a comic book superhero of the body, and just like many superheros, it is often wrongfully accused for crimes it didn’t commit all the while trying to protect its citizens (the body). From the outside looking in, the psoas looks to be a menace to our body’s muscular ecology, always tightening down on the pelvis, causing hyper lordosis (excess arching in the lower back), low back discomfort/pain, groin problems, etc. However, like many superheros, what if we didn’t completely understand the greater purpose that our superhero has been fighting for? Could it be that the psoas is simply reacting to changes elsewhere in our body and in our psyche to protect our structure?
The saga continues…
Fitness trainers, physical therapists, etc., are like the police force, trying frantically to control the actions of the iliopsoas by enforcing rigorous routines of stretching, pelvic tilting, and abdominal bracing to maintain neutral spine at all times. This order imposed on bodies that are chronically in chaos seem to be fraught with discontent, at best.
Let’s take a look at the anatomy first:

(http://www.thepilatesacademy.com.au/assets/images/iliopsoas.jpg)
-it attaches from the T12 vertebra and all of the lumbar vertebra, wraps through the pelvis and then meets at the lesser trochanter of the femur. Some suspect that, on average, the psoas group has enough contractile force to hold up a volkswagen! When we talk about core strength, we would be remiss to forget about the Psoas.
Function of the Psoas…
-Not just a hip flexor, although it certainly does do that
-Guy wire of the body, helping with proper alignment of the bones (when the bones stack on top of each other in good postural neutral, the muscles don’t have to fight to hold it up, thus avoiding fatigue and tightness…remember that muscles often get tight because of instability)
-Functions as a counter-balance to anchor the body when the abdominal muscles are doing work
-Hydraulic pump assisting with respiration, pumping of synovial fluid through the spine, massaging of organs to aid in digestion
In her lovely compendium, The Psoas Book, Liz Koch outlines in beautiful detail the beauty of the psoas muscle and how it relates to the body’s function. She talks about how our culture of exercise focusing on external or “show” muscles comes at a price to our deeper structure. Over emphasis on conditioning the abdominals without access to the deep stabilizing systems held within the body, the psoas reacts by tightening further, thus creating stress and strain on soft-tissue structures, referred muscle pain, and stress to the diaphragm and other viscera. She even delves into topics ranging from emotional states and how they relate to psoas function, women’s menstrual cycles, and even sexual function! According to Koch, and i agree based on my observations with myself and my days doing therapy, the psoas does not respond well to stretching, as it seems to be too harsh of a stimulus. The psoas should be released via gravity and mindful awareness. This may sound like smoke, mirrors, and snake oil, however those that have not experienced a true psoas release would do well to undergo the experience and see for yourself. Her website is coreawareness.com and she regularly has podcasts, psoas retreats, and wellness workshops to help people re-establish and re-discover their deeper self. I highly recommend her book, as she talks so much more colorfully about the psoas than I ever could.
Most of my friends and colleagues know that I don’t like to focus too much on one muscle, however, if there was one to focus on, I think the Psoas would be it. Just like a superhero trying to do good and fend off evil from a city, often times the plight is that the very people in which our superhero is trying to protect retaliate negatively. Perspective, in the case of the psoas, is important in understanding how the psoas relates in function, both through physical, mental and emotional means. This is a good lesson to be aware that muscles don’t perform just one action; this is a “systems” approach to the body, which limits the ability for the person/practicioner to understand scenarios in which the muscle doesn’t act the way in which a book says it does. In this regards, an open mind and a keen eye trained to see function and the possibility of something that may not be in a book is key to cultivate long term. Why are the muscles reacting the way they do? Could it be that the problem isn’t the site itself?
What is in store for our hero now? Will he be doomed to live a life of isolation deep within the bowels of the body? Or will he establish rapport with his fellow muscles to work together in improving movement and, thus, quality of life? I vote for the feel-good ending.
CR




