May is "True Core" month here in the Badlands, which means in every class we'll be experiencing some connection to "core" muscles and fascia. Learning to sense these structures is part of learning to engage and move from the deepest sources of your power. Traditionally in yoga these structures are referred to as the "bandhas," or locks - like ship locks, not like key locks. The bandhas refer to the three diaphragms of the body, structural horizontal elements that are key to both breath and movement: the pelvic diaphragm/floor made of 8 interlocking muscles in a fascial sheath (mula bandha), the respiratory diaphragm which is also a muscle wrapped in fascia (uddiyana bandha) and the vocal diaphragm through which we speak and modulate breath (jalandara bandha). Most focus in the beginning is on the first two.
The cool thing about working with the bandhas is that when you engage these muscles, the vanity abs (rectus and obliques) come along for the ride - this doesn't work the other way around, which is why crunches are less than counterproductive.
The pelvic and respiratory diaphragms can work in concert, supporting both breath and movement, and are each functionally connected to two of the other deep core muscles - the pelvic diaphragm to the transverse (from hip point to hip point horizontally across the low belly) and the respiratory to the psoas, the only muscle that crosses from lower to upper body, often referred to as a "hip flexor" but oh so much more crossing from the thoraco-lumbar vertebrae forward and down to the insides of the pelvic bowls with extensions to the inner femurs.
The video below is a human dissection demonstrating the connection of the deep front line which includes the sting ray looking diaphragm-psoas connection. If you prefer not to see this clinical demonstration then read the next blog post instead. For some people, seeing this will help you connect to the same structures in your own body, which is why I include this wonderfully beautiful video. Some folks would rather not see human cadavers which is why I include the bold, large letters.
Leave your reaction to the video or to your feeling of these connections in a comment below.