Roberto Poli
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The psoas muscle:
His majesty, the psoas, without boring you too much with the anatomy…
1. It’s a muscle that thinks.
The psoas is surrounded by a rich network of visceral and somatic nerve endings. This makes it a true neurovegetative transducer: it feels, responds, retains. It is the first to harden in the face of trauma and the last to release it.
2. It’s a bridge between the heart and the legs.
It originates in the thoracic-lumbar vertebrae, passes alongside the diaphragm, slides between the viscera, and inserts into the lesser trochanter of the femur. It’s not a simple flexor: it deeply connects the chest to the pelvis, also participating in the rhythm of breathing (especially in deep diaphragmatic breathing).
3. It’s an “emotional guardian.”
The psoas is often overactive in those who live in fight-or-flight mode. A chronically contracted psoas can be a somatic manifestation of archaic fears, feelings of insecurity, and experiences of instability. Working there also means tapping into cellular memories.
4. It’s a muscle… but also a sensory organ.
According to some osteopathic and somatic approaches (including Jeffrey Yuen), it should be treated as an organ of deep feeling, not just a mechanical structure. It has a true energetic grounding function, especially for those who have lost touch with their center (from the navel down).
5. It’s related to Water and the Mandate (Ming Men).
According to Classical Chinese Medicine, it’s related to the Kidney, Ming Men, and Zhi. Its tension can be a sign of disconnection from one’s purpose, from one’s visceral “why.” Releasing it can reactivate listening to the Mandate of your project (surely it sounds strange, but it isn’t). How does it feel?
1. Chronic lower back pain (especially unilateral).
The psoas muscle pulls the lumbar vertebrae forward and laterally.
Result? Asymmetrical lower back pain, resistant to conventional manipulations.
2. Inguinal tension and pubalgia.
This can cause deep pain in the inguinal fold, sometimes confused with a hernia, inflammation of the adductor tendons, or urological/gynecological problems.
3. Sacral pain or pelvic misalignment.
When contracted unilaterally, the psoas muscle can “rotate” the pelvis, altering its relationship with the sacrum and ileum.
Sensation: As if one leg were “shorter” or the body were unbalanced. 4. Stomach pain due to stress.
The psoas muscle communicates with the diaphragm and viscera. If it is in spasm, it can create a real sensation of visceral knot, psychosomatic nausea, unexplained abdominal tension.
5. Knee pain (without apparent cause).
Its action on the anterior chain and internal rotation of the femur can cause anterior or internal knee pain, even without obvious inflammation.
6. “Masked” sciatica.
An inflamed psoas muscle can irritate the femoral nerve, but sometimes also alter the course of the sciatic nerve as a compensatory effect.
Typical story: “My leg hurts… but my back is fine!”
7. Menstrual cramps and pelvic tension.
The psoas muscle touches the uterus, ovaries, and colon.
If it contracts, it can contribute to dysmenorrhea, abdominal bloating, and pelvic pain, especially in those who live their entire life “in their gut.” 8. A feeling of “having no grounding.”
This isn’t a physical pain, but rather a subtle perception: confusion, emotional instability, and a lack of grounding.
It’s your body telling you, “You don’t trust yourself.”
We know it as the hip flexor, we treat it like a muscle, but the psoas is much more.
It’s the “invisible hinge” between the brain, the heart, the gut, and the story we carry inside.
Here are 5 things you (maybe) didn’t know:
1. It’s connected to the limbic system.
Whenever we feel threatened, the psoas prepares to flee.
It’s a direct messenger from the amygdala.
It’s not just tension: it’s emotional memory.
2. It speaks to your instinct and your breath.
It passes through the diaphragm and touches the viscera.
If it contracts, it can disrupt digestion, vagal tone, and feelings of safety.
The body shuts down to protect itself.
3. Responds to the PNEI. Cortisol, inflammatory cytokines, chronic stress: the psoas feels it all.
It’s a “spy” on the psycho-neuro-endocrine-immune axis.
If you don’t sleep well, if you’re always on guard, it knows.
4. Freezes the trauma.
In trauma, it’s not always fight or flight; sometimes you freeze.
The psoas can remain tense for years, as if the danger never passed.
And just stretching it isn’t enough to release it.
5. It needs a specific diet
Magnesium bisglycinate for relaxation;
Vitamins B6 and B1 to regenerate nervous system circuits;
Ashwagandha to tell it it can trust;
Zinc to repair silent damage;
But be careful:
In kinesiology, we don’t just look for weak muscles; we look for the reasons they became weak.
Sometimes there’s a lack of magnesium.
Sometimes all that’s missing is silence. A psoas muscle that doesn’t hold up can be a sign of a zinc deficiency or an
unspoken desire for protection.
This is why there’s no one vitamin that’s right for everyone.
Each person is a unique experience, a story told through the body, and that can be listened to with respect.
True strength isn’t imposed; it’s restored when internal conditions are right.
THE 3 LEVELS OF WEAKNESS IN KINESIOLOGY
(When a muscle “can’t hold up,” what is it really saying?)
1. BIOCHEMICAL LEVEL – The body is hungry:
Mineral, vitamin, fatty acid, and enzyme deficiencies.
Silent poisonings, dysbiosis, hormonal imbalances.
Signs: chronic fatigue, spasms, recurring pain.
What is my body lacking to function properly? 2. PSYCHIC LEVEL – The body has memory:
Emotional traumas, pain, old undigested fears.
Protective mechanisms (freezing, escaping, masking).
Muscles “shut down” to protect you.
What am I clinging to or avoiding?
3. ENERGY LEVEL – The body has a message:
Interferences in the meridians, organic imbalances according to Classical Chinese Medicine.
Altered energy field, fragile grounding.
Muscles speak through Qi that doesn’t flow.
Where have I lost my fluidity?
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