Stubborn Low Back Pain in Orem — What Scans Miss and Muscle IQ Tests For
- Dr Chris Knudsen
- 4 days ago
- 4 min read
You have had the back pain long enough that you stopped describing it precisely. It is not a spot. It is a band, a region, something across the low back that gets loud after a long drive down I-15 or an afternoon of yard work in an Orem August.
The scan came back unremarkable. No one could point to the thing that hurts. So it got called non-specific low back pain, and you were sent home to strengthen your core.
There is a structure across your low back that rarely comes up in that conversation, and a growing body of research suggests it may be part of the answer.
A Sheet, Not a Muscle
It is a big sheet of tissue across your low back. The anatomy books call it the thoracolumbar fascia. It links your spine to your pelvis, and it ties the large muscle of your upper back on one side to the large muscle of your hip on the other.
Think of it less like a wrapper and more like a suspension bridge that carries load. A substantial share of the force a muscle produces is not delivered through its tendon at all — it is passed sideways, through fascia, into neighboring muscles.
Why This Sheet Can Hurt More Than Muscle
Here is the part that surprises most people. In research settings, an irritant given into this sheet in healthy volunteers produced pain that was more intense, more unpleasant, and spread over a wider area of the back and legs than the same test in muscle or in the tissue just under the skin.
The reason appears to be nerve supply. Studies comparing tissues have found the density of nerve endings in this sheet to be higher than in the back muscles themselves. A 2021 review concluded it carries important pain-signaling nerve supply in both animals and humans, and may be an under-recognized contributor to chronic back pain.
Why It Is So Hard to Point To
Patients often apologize for not being able to locate their own pain. They should not. Signals from all the soft tissues of the lower back converge on the same relay neurons in the spinal cord, so pain from this sheet is genuinely hard to tell apart from muscle pain — even for the person feeling it.
That same review raised a longer-term concern: sustained signaling from this tissue may, over time, contribute to a pain system that has become hypersensitive, where the volume gets turned up on signals that should be routine.
When the Layers Stop Sliding
Healthy fascia is layered, and those layers are supposed to glide against one another. Ultrasound can measure that gliding.
In a 2011 study, that gliding was roughly 20 percent lower in people with chronic low back pain than in people without it. A more recent imaging study found the fascia and muscles of the lower back were generally stiffer in people with chronic low back pain, with the biggest differences low in the back — right about where most people point.
The concern with reduced gliding is not only mechanical. When layers lose mobility and stick together, the nerve endings living in that tissue are more likely to be irritated.
Why Irritated Tissue Can Leave You Weak
This is where a fascia problem stops being only a fascia problem.
Your nervous system sets how hard your muscles are allowed to work — a muscle tone dial. Ongoing irritation coming from tissue is one of the things that can turn that dial down, and muscles around the irritated area may go partly offline. They test weaker than they should. Neighboring muscles pick up the slack, work harder than they were built to, and thicken and stiffen in turn.
That is often why a back can feel tight and weak at the same time, and why the tightness returns a day or two after stretching. Stretching a muscle that is compensating does not address why it started compensating. More on that pattern on our muscle inhibition page.
If your back has been tight and weak at the same time for months, that pattern is testable. Call Muscle IQ at (801) 310-0851.
What Changes When the Tissue Is Treated
In a 2023 trial, patients with low back pain who received hands-on treatment of this tissue showed a measurable decrease in its thickness and in the stiffness of the nearby back muscles compared with a simulated treatment group — along with a significant reduction in pain intensity.
The authors described the pain relief as immediate and transient, and that word matters. One session changed the tissue and how it felt. Lasting change is a process, not a single visit, and honest expectations are part of good care.
How This Gets Evaluated in Orem
The takeaway is not a stretch to try at home. It is that "nothing showed up on the scan" is not the same as "nothing is wrong." Imaging is not designed to show how a sheet of soft tissue is gliding or how much nerve traffic it is producing.
The MRI shows the surgeon where to put the scalpel. Muscle weakness shows the physical therapist where to treat.
At Muscle IQ Physical Therapy in Orem, a first visit is an evaluation: muscle testing, hands-on treatment of the tissue that appears to be driving the complaint, then the same muscles tested again. When strength changes inside one visit, that is useful information about where the signal was coming from. It is the same reasoning behind the Fascial Distortion Model work done here.
Muscle weakness has a source. Finding it is the job. Pain can go away.
One note before you call: back pain with numbness in the groin, loss of bowel or bladder control, unexplained weight loss, or fever should be evaluated by a physician first.
Take control of your health today by calling Muscle IQ at (801) 310-0851 to schedule your first appointment.
Learn more at MuscleIQ.com.
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