The Psoas Major

The psoas major, the body's main engine of walking,doesn't attach to the pelvis, is arguably more
is one of three muscles that make up the iliopsoasinfluential in regards to the pelvis than any of them.
muscle group. The psoas major inserts on the back- Your psoas is intimately connected to breathing as
half of the inner thigh, comes forward to cross overthe diaphragm muscle, the main muscle of respiration,
the rim of the pelvis and moves backwards again tohas ligaments that wrap around the top of the psoas
attach along the lumbar or lower spine. The iliacusand two long attachments, called crura, that come
muscle lines the inside wall of the pelvis and joinsdown to insert on the first three vertebrae of the
psoas major to form a common tendon insertinglower spine. This means that every breath resonates
together on the back half of the inner thigh. Psoasin some way with the psoas and the movement of
minor is an interesting muscle that anatomy books willthe psoas can have great influence on the breath.
tell you it is present in only 50% of people and is- The Psoas moves in more than one direction as it
slowly disappearing. Though this is technically true thecomes diagonally forward to cross over the rim of
body has many different connections, one of themthe pelvis and then moves straight up to connect to
being through fascia, a connective tissue that we willthe lumbar spine. This allows the psoas to work like a
go into in future articles. So even if you don't havepulley system increasing the natural force that it can
this muscle it is likely to manifest energeticallygenerate.
through the fascial lines of the body. Bodyworkers- The psoas is the main muscle of walking. Walking is
often refer to feeling this muscle whether it is therea full body experience initiated in the trunk and
or not.extending out through the extremities. The psoas
Psoas major attaches at six points, the back of thefrom the deepest core moves the legs rather than
inner thigh and then five different points along thethe legs moving the body. In a weird way you can
spine. The first four vertebrae of the lumbar spine,say the leg begins up at the top of the psoas as
which is the lower back, and the bottom vertebraetruly fluid movement in walking is felt as a pendulum
of the thoracic spine; which is anything that includes alike release from the base of the rib cage at T12.
rib. (T12). As a result the psoas spans and affects- The Psoas is the body's main hip flexor which is
many joints as opposed to the iliacus, for example,why it is the main muscle of walking but it plays a
which only crosses the one joint where the legdeeper maybe more important role as a flexor.
meets the pelvis.Flexion is the one of the ways we manifest our
The psoas is unique for many reasons.distress, fear and trauma. Our inability to process
- Only two muscles connect the legs to the spine.these experiences and emotions create imbalances
The psoas major and the piriformis.that often affect the psoas. For certain extreme
- 57 muscles attach on the pelvis. The psoas, whichcases it is like living in a state of constant flexion.