The Psoas: The Muscle That Holds Stress

How the Body Stores Tension Deep in the Hips and Belly

Deep inside the body, tucked beneath layers of muscle and organs, lives a powerful muscle many people have never heard of:

The psoas.

This deep core muscle connects the spine to the legs, running from the lumbar vertebrae through the pelvis and attaching to the upper thigh.

The psoas helps lift the leg when walking, stabilizes the spine, supports posture, and plays an important role in movement.

But it also has another role that is less obvious.

The psoas is closely connected to the body's stress and survival response.

Because of this, it is often referred to as the "fight-or-flight muscle."

A Personal Reflection

Over the years, I've noticed this pattern in my own body as well.

During particularly stressful seasons of life, I often find myself holding tension deep in my hips, lower back, and belly without even realizing it. Sometimes it shows up as stiffness after sitting. Other times it's a feeling of bracing or holding that seems to appear out of nowhere.

What I've learned is that stress doesn't only live in our thoughts.

It lives in our bodies, too.

For me, slowing down, moving, breathing deeply, and receiving bodywork have all been important reminders that the body feels better when it doesn't have to stay in protection mode all the time.

Many of my clients share similar experiences, which is one reason I find this work so meaningful.

The Body's Survival Muscle

When the nervous system senses danger—real or perceived—the body prepares to act.

Heart rate increases. Breathing becomes quicker. Muscles prepare for movement.

The psoas plays a key role in this response by helping the body curl forward, run, brace, or protect the core.

In moments of true danger, this response is incredibly helpful.

The challenge is that modern life rarely offers a clear beginning and end to stress.

Instead of escaping a threat and then returning to rest, many of us experience ongoing pressures throughout the day:

Deadlines. Emails. Traffic. Conversations. Responsibilities.

The body quietly absorbs these experiences, and the psoas may remain subtly activated long after the stressful moment has passed.

Over time, tension can become so familiar that we stop noticing it.

When the Psoas Holds Tension

Because the psoas sits so deep within the body, tension here can show up in many different ways.

You may notice:

• Tight hips
• Low back discomfort
• Difficulty standing fully upright
• Fatigue through the front of the hips
• Shallow breathing
• A feeling of tension or guarding through the belly

Since the psoas connects directly to the lumbar spine, it can significantly influence how the lower back feels and moves.

When the muscle remains shortened for long periods—often from sitting, stress, or both—the lower back may compensate by tightening as well.

This is one reason hip and abdominal work can sometimes ease discomfort that seems to originate in the back.

The body rarely functions in isolated pieces.

Everything is connected.

The Psoas and the Breath

The psoas also shares an important relationship with the diaphragm, the primary muscle of breathing.

These two muscles sit very close to one another and work together to support both breathing and core stability.

When the diaphragm moves freely, breathing tends to feel deeper and more relaxed.

When stress causes breathing to become shallow or rapid, surrounding muscles—including the psoas—often tighten in response.

Over time, this pattern can contribute to tension throughout the abdomen, hips, and lower back.

Supporting both the breath and the psoas often helps the entire body settle into a calmer rhythm.

Sitting and the Modern Body

Another common reason the psoas becomes tight is simply the amount of time many of us spend sitting.

When seated for long periods, the hips remain in a shortened position. Over time, the body adapts to that posture, and the psoas may resist lengthening when we stand, walk, or move.

This can contribute to:

• Hip stiffness
• Low back strain
• Reduced mobility through the pelvis
• Fatigue during activity or longer walks

The solution isn't perfect posture.

It's regular movement.

Standing, walking, stretching, and changing positions throughout the day can help maintain balance and reduce accumulated tension.

What I Often Notice in the Massage Room

Many clients arrive with tension in the hips, low back, or abdomen without realizing how connected these areas truly are.

As surrounding muscles begin to soften—the glutes, hip stabilizers, abdominal wall, and lower back—the body often starts releasing deeper patterns of tension.

Breathing slows.

The belly softens.

The nervous system begins to shift out of its protective state.

Massage doesn't directly "fix" the psoas in isolation.

Instead, it helps create the conditions that allow the body to release tension naturally.

By supporting circulation, movement, breath, and nervous system regulation, deeper structures often respond on their own.

Signs Your Body May Be Holding Deeper Tension

Sometimes tension in the psoas and surrounding tissues isn't obvious.

You don't have to be experiencing severe pain to benefit from supporting these deeper structures.

You may notice:

• A feeling of stiffness when standing after sitting
• Tightness that returns despite stretching
• Low back discomfort that seems difficult to pinpoint
• Shallow breathing during stressful periods
• Fatigue through the hips or legs after activity
• A sense that your body is always "on" and has difficulty fully relaxing

These experiences don't necessarily mean something is wrong.

Often they are simply signs that the body has adapted to stress, posture, or repetitive movement patterns over time.

The good news is that the body is remarkably adaptable.

With movement, breath awareness, and supportive bodywork, many of these patterns can begin to soften.

Allowing the Body to Soften

One of the simplest ways to support the psoas is through breathing.

When the breath slows and deepens, the nervous system begins shifting away from fight-or-flight and toward rest and restoration.

This change allows muscles throughout the body—including the deep core—to soften.

Try this simple practice:

Place one hand on your belly.

Take a slow inhale through your nose and allow the belly to gently expand.

Let the exhale be long, relaxed, and unforced.

Repeat for several slow breaths.

Even a few cycles can help signal safety to the body.

A Gentle Invitation

The body carries our experiences in ways we often don't notice until tension begins to appear.

The psoas is one of those quiet places where stress can accumulate over time.

By supporting breath, movement, and relaxation throughout the hips and abdomen, the body can gradually return to a more balanced state.

When the deep muscles of the core soften, posture often improves, breathing becomes easier, and movement feels lighter.

In my practice, I often incorporate work that supports the hips, abdomen, diaphragm, and nervous system as part of a customized treatment. Every body is different, and sometimes the greatest relief comes not from working harder, but from helping the body feel safe enough to let go of what it has been holding.

Because sometimes the body isn't asking us to push harder.

Sometimes it's simply asking for space to soften.