The Psoas Muscle: Trauma, Emotional Release, and Why It’s Called the Muscle of the Soul

There are places in the body where our stories linger long after the mind believes we have moved on.

The jaw tightens after years of swallowing words that were never spoken. Shoulders creep toward the ears from carrying invisible responsibilities. The abdomen hardens from bracing against uncertainty. Deep within the center of the body, however, lies one of the most emotionally responsive structures of all. The psoas muscle.

Often referred to as the muscle of the soul, the psoas muscle is far more than a hip flexor. This deep core muscle plays a vital role in posture, movement, breathing, nervous system regulation, and our fundamental sense of safety. When chronically tight, it can feel as though anxiety itself has taken up residence within the body as a persistent gripping that never fully releases.

For many people, tight hips are not merely a mobility issue. They can also reflect emotional holding, chronic stress, unresolved trauma, or years spent living in survival mode. As a result, yoga practitioners frequently discover that deep hip-opening postures evoke unexpected tears, anger, grief, or long-forgotten memories.

Far from being imagined, these experiences point toward an increasingly recognized reality: the body stores experience somatically. At the center of that conversation sits the psoas muscle.

Understanding this remarkable muscle helps us understand how the body protects itself, how trauma becomes embodied, and how conscious breath and movement can create pathways toward healing.

What Is the Psoas Muscle?

The psoas major is a deep core muscle that originates along the lumbar spine, travels through the pelvis, and attaches to the upper femur. As one of the body’s primary hip flexors, it assists with walking, running, climbing stairs, maintaining posture, and stabilizing the spine.

Yet anatomy alone does not explain the significance of the psoas muscle.

Unlike many skeletal muscles, the psoas resides deep within the body beside the lumbar vertebrae, kidneys, reproductive organs, digestive organs, diaphragm, and major nerve pathways. In other words, it occupies the very center of our survival physiology.

Moreover, the psoas is part of what anatomists call the Deep Front Line, a fascial network that extends from the soles of the feet through the inner legs, pelvis, diaphragm, chest, throat, and jaw. Throughout our Yoga Teacher Trainings, we often refer to this fascial pathway as the body’s “apple core” because it connects the deepest structural layers into one integrated system.

Consequently, tension in the jaw can influence the hips. Restriction in the diaphragm may affect pelvic mobility. Emotional suppression can manifest as contraction patterns throughout the core.

The body is not compartmentalized.

Instead, it functions as a sophisticated web of interconnected relationships.

Why the Psoas Muscle Is Called the Muscle of the Soul

Few muscles have inspired as much fascination as the psoas.

Its poetic nickname, the muscle of the soul, emerged because of its profound relationship with the nervous system and emotional life. Unlike muscles we consciously contract during exercise, the psoas muscle responds instinctively. It operates in close partnership with the autonomic nervous system, particularly the fight, flight, and freeze responses.

Whenever the brain perceives danger, whether physical, emotional, or psychological, the psoas contracts to prepare the body for protection.

Imagine an animal startled in the wild. Instantly, its body curls inward. Breathing becomes shallow. Muscles tighten. The hips prepare to run.

Humans share this same biological response. The difference is that modern stress rarely resolves through physical movement. Instead of fleeing, we sit at desks, suppress emotions, ignore discomfort, and continue functioning while the body remains subtly braced.

Over months and years, chronic stress conditions the psoas muscle to stay contracted.

Eventually, the body never receives a clear signal that the threat has passed.

As a result, a chronically tight psoas may contribute to:

• Persistent hip tightness
• Lower back pain
• Anxiety and hypervigilance
• Digestive dysfunction
• Hormonal imbalance
• Shallow breathing
• Pelvic floor tension
• Jaw clenching
• Emotional numbness
• Difficulty relaxing
• Chronic fatigue

In this way, the psoas muscle becomes both protector and prison.

How Trauma Becomes Stored in the Body

To understand why emotions often surface during hip-opening practices, we must first explore fascia and somatic memory.

Fascia is the body’s connective tissue matrix. It is a fluid-rich network that surrounds muscles, organs, bones, blood vessels, and nerves. Once dismissed as inert packing material, fascia is now recognized as a highly intelligent sensory system that continuously communicates with the nervous system.

Research has shown that fascia contains extensive sensory receptors capable of detecting pressure, movement, tension, and internal states. Through these mechanisms, it becomes deeply involved in stress responses and emotional regulation.

Many somatic therapists describe fascia as the body’s memory network.

Experiences that overwhelm our capacity to cope; such as grief, fear, shame, trauma, chronic stress, or emotional suppression; can become embedded as patterns of tension and contraction.

This explains why someone may intellectually move beyond an experience while their body continues responding as though the threat remains present.

The mind forgets.

The body remembers.

Because of its relationship to survival responses and its integration within the fascial system, the psoas muscle often becomes one of the body’s primary storage sites for unresolved stress.

The Surprising Connection Between the Jaw and the Hips

One of the most fascinating yet overlooked relationships in the body is the connection between the jaw and the pelvis.

Individuals struggling with TMJ dysfunction, teeth grinding, jaw clenching, or chronic neck tension frequently experience tight hips as well. Far from being coincidence, this relationship reflects a deep neurological and fascial connection.

Through the Deep Front Line, the inner arches of the feet connect to the pelvic floor, diaphragm, throat, tongue, and jaw. When tension accumulates in one area, the entire line often responds.

Emotionally, both the jaw and pelvis relate to vulnerability, expression, instinct, and protection.

We clench our jaws when we:

• Suppress anger
• Hold back tears
• Silence ourselves
• Force composure
• Swallow difficult emotions
• Attempt to stay strong

Likewise, the hips and psoas muscle tighten when we feel unsupported, unsafe, emotionally guarded, or disconnected from our authentic expression.

During moments of stress, many people unconsciously contract both regions simultaneously. The teeth clench, the abdomen hardens, pelvic floor tightens, and the hips draw inward.

Consequently, practices that soften the jaw frequently create release throughout the pelvis. Similarly, opening the hips often reduces tension in the face, neck, and throat.

The body unwinds as an integrated whole.

Repressed Emotions and a Tight Psoas Muscle

The psoas muscle is particularly sensitive to emotions associated with fear, vulnerability, shame, grief, and self-protection.

Whenever emotions cannot move outward, they often move inward.

Children raised in environments where emotional expression feels unsafe frequently develop chronic muscular bracing patterns. Adults navigating prolonged stress, demanding careers, caregiving responsibilities, or unresolved trauma often do the same.

Over time, the psoas learns to hold, brace, and protect.

For this reason, a tight psoas muscle is often more than a flexibility concern. It may reflect years spent:

• Over-functioning
• Remaining hyper-independent
• Suppressing personal needs
• Avoiding vulnerability
• Carrying emotional burdens alone
• Living in chronic survival mode

This helps explain why deep hip-opening practices can trigger powerful emotional responses.

Tears may arise during Pigeon Pose.

Anger might surface during Low Lunge.

Grief can emerge in Reclined Bound Angle Pose.

Such experiences occur not because yoga creates emotion, but because safety allows frozen emotional energy to thaw.

The Powerful Relationship Between the Diaphragm and the Psoas Muscle

Among the body’s most important anatomical relationships is the connection between the respiratory diaphragm and the psoas muscle.

The diaphragm serves as the primary muscle of breathing, and it shares both fascial and functional relationships with the psoas. When breathing becomes restricted, the psoas often tightens in response.

Under stress, breathing typically shifts from deep diaphragmatic movement to shallow chest breathing. This pattern maintains sympathetic nervous system activation and signals that danger may still be present.

Over time, a cascade develops:

• The diaphragm loses mobility.
• The psoas remains contracted.
• The pelvic floor tightens.
• The jaw clenches.
• The nervous system stays vigilant.

Fortunately, breath provides one of the fastest pathways out of this cycle.

Deep diaphragmatic breathing stimulates the parasympathetic nervous system (the branch associated with rest, digestion, healing, and safety).

As the breath deepens, the body begins receiving a different message:

“You are safe enough to let go.”

Breathwork for Releasing Psoas Tension

Breathing practices can profoundly influence both the nervous system and the psoas muscle.

Rather than forcing release through aggressive stretching, breathwork creates the internal conditions necessary for relaxation and healing.

1. Diaphragmatic Belly Breathing

This foundational technique helps shift the nervous system from defense into regulation.

How to Practice:

• Lie comfortably on your back.
• Bend the knees and place the feet on the floor.
• Rest one hand on the chest and one on the abdomen.
• Inhale slowly through the nose.
• Allow the belly, ribs, and lower back to expand.
• Exhale gently through the mouth with a soft sigh.
• Relax the jaw and tongue.

Continue for five to ten minutes.

2. Extended Exhale Breathing

Lengthening the exhalation stimulates parasympathetic activity and reduces muscular guarding.

Try:

• Inhale for four counts.
• Exhale for six to eight counts.

As you exhale, consciously soften the jaw, abdomen, pelvic floor, and inner hips.

3. Constructive Rest Position

Many somatic practitioners consider this one of the most effective positions for psoas release.

How to Practice:

• Lie on your back.
• Bend the knees.
• Place feet hip-width apart.
• Allow the knees to gently rest toward one another.
• Relax the arms.

Remain here for ten to twenty minutes while breathing naturally.

Interestingly, you may experience that trembling, emotional release, or profound relaxation often arise spontaneously in this position.

4. Jaw Relaxation Breath

Because the jaw and pelvis mirror one another, relaxing the mouth can help release the hips.

Allow the lips to part slightly while exhaling with an audible sigh. Let the tongue soften away from the roof of the mouth.

Notice how the belly and pelvis respond.

5. Humming for Vagal Toning

Humming stimulates the vagus nerve and supports nervous system regulation.

Simply inhale deeply and exhale with a gentle humming sound.

The vibration created throughout the throat and chest promotes feelings of calm, safety, and relaxation.

Yoga Poses That Support Psoas Release

When working with the psoas muscle, gentleness often produces greater results than force.

Aggressive stretching can reinforce protective patterns. Conversely, slow and mindful movement communicates safety.

Particularly supportive postures include:

1. Supported Pigeon Pose

Supported Pigeon Pose gently opens the outer hips and surrounding fascial tissues connected to the psoas muscle. When practiced with props and steady breathing, it can help reduce protective holding patterns and encourage both physical and emotional release. Hold for 2–5 minutes per side, allowing the body to soften rather than forcing the stretch.

2. Reclined Bound Angle Pose (Supta Baddha Konasana)

This restorative posture creates a sense of openness through the hips, pelvis, and lower abdomen while inviting the nervous system into a state of relaxation. Because the psoas often releases in response to feelings of safety, this pose can be particularly effective when held with support beneath the knees. Remain here for 5–10 minutes, breathing slowly and naturally.

3. Low Lunge (Anjaneyasana)

Low Lunge lengthens the front of the hip and directly targets the tissues surrounding the psoas muscle. By combining the pose with slow diaphragmatic breathing, practitioners can create space through the hip flexors while reducing chronic tension patterns. Hold for 1–3 minutes per side, keeping the breath smooth and the jaw relaxed.

4. Child’s Pose (Balasana)

Child’s Pose gently lengthens the lower back, softens the abdomen, and encourages diaphragmatic breathing, all of which can help reduce tension around the psoas muscle. Its grounding quality also supports nervous system regulation, creating the conditions needed for deeper release. Hold for 2–5 minutes, breathing slowly into the back body and allowing the hips to become heavy.

5. Supine Twist

Supine Twist helps release tension through the lower back, pelvis, and deep core muscles, including the psoas. The gentle rotational movement can also encourage relaxation of the nervous system, allowing the body to let go of unnecessary bracing. Hold for 2–5 minutes per side, breathing deeply into the ribs and abdomen.

6. Happy Baby Pose

Happy Baby Pose softly opens the inner hips and pelvic floor while decompressing the lower spine. Because the psoas works closely with these structures, this pose can help reduce deep-seated tension and create a feeling of grounded ease. Hold for 1–3 minutes, focusing on slow breaths and allowing gravity to do the work.

7. Legs Up the Wall (Viparita Karani)

Legs Up the Wall is a deeply restorative pose that helps calm the nervous system and reduce overall muscular tension. As the body settles and the breath slows, the psoas muscle often begins to soften naturally, making this an excellent posture for stress relief and recovery. Hold for 5–15 minutes while maintaining a relaxed, effortless breath.

In many cases, restorative yoga provides deeper release than intense flexibility practices because the nervous system is given time to down-regulate.

The body must feel safe before the psoas muscle is willing to soften.

Why Emotional Release Happens During Yoga

Many practitioners are surprised when emotions arise unexpectedly on the mat.

Yet from a somatic perspective, this response makes perfect sense.

As chronic muscular contraction begins to soften, suppressed experiences may finally emerge into conscious awareness.

Emotional release can appear as:

• Crying
• Trembling
• Waves of sadness
• Anger
• Relief
• Fatigue
• Unexpected memories
• A profound sense of openness

Importantly, this is not weakness.

It is unwinding.

The body is completing processes that survival once interrupted.

While healing often involves insight and reflection, it can also occur through physiology. Sometimes transformation begins simply by allowing the body to finish what it was never able to complete.

Safety Is the Foundation of Healing

Modern wellness culture often promotes the idea that healing requires effort, intensity, or force.

The nervous system tells a different story.

Healing happens through safety.

The psoas muscle does not release because we aggressively stretch it into submission. Instead, it softens when the body genuinely believes that danger has passed.

This is precisely why mindfulness, restorative yoga, conscious breathing, somatic awareness, and compassionate movement practices are so effective.

The body responds not only to what we do, but to how we do it.

When we stop treating the body as a problem to solve and begin listening to it as a messenger, healing becomes possible.

Listening to What the Body Is Trying to Say

Many of us learned to override discomfort.

We pushed through exhaustion.

Ignored emotional pain.

Stayed productive at all costs.

Maintained composure regardless of what we were feeling.

Yet eventually the body speaks.

Often, it speaks through:

• Tight hips
• Chronic jaw tension
• Lower back pain
• Digestive issues
• Anxiety
• Fatigue
• Shallow breathing
• Persistent muscular tension

These symptoms are not evidence of failure.

Rather, they are forms of communication.

The body may simply be asking for softness, attention, expression, rest, and safety.

The psoas muscle reminds us that healing is not solely about becoming more flexible. It is about becoming more available to ourselves.

Returning Home to the Body

At its deepest level, releasing the psoas muscle is not about achieving advanced yoga poses or increasing range of motion.

Instead, it is about returning home to the body.

Every slow breath communicates safety.

A softened jaw signals that we no longer need to carry everything alone.

Each conscious exhale invites the nervous system out of survival mode and into trust.

Perhaps this is why the psoas muscle has earned the title the muscle of the soul.

Deep within the center of the body lives our instinct to protect ourselves. Yet within that same space resides our capacity to soften, surrender, heal, and reconnect.

The journey is not about forcing release.

Rather, it is about creating enough safety for the body to let go when it is ready.