28/08/2026
🧠A new systematic review on the thoracolumbar fascia and low back pain is worth paying attention to, particularly because one of its authors is Jan Wilke.
Wilke is a prominent fascia researcher and is probably best known to many therapists for his work investigating the anatomical basis of the myofascial chains proposed within Thomas Myers’ Anatomy Trains model. His research has continued to explore fascia, myofascial continuity and force transmission, so this is certainly not research coming from a position that fascia is irrelevant.
🔬 Wilke, Debertshaeuser and Konrad published Differences in the Thoracolumbar Fascia Between Low Back Pain Patients and Healthy Individuals: A Systematic Review with Meta Analysis in 2026. They brought together 14 studies involving 1,001 people and asked whether measurable characteristics of the thoracolumbar fascia differed between people with low back pain and asymptomatic controls.
The answer was yes.
Across the included studies, people with low back pain had a thicker thoracolumbar fascia, greater measured stiffness and greater echogenicity. Thickness was also moderately associated with reported pain intensity.
These are important findings. Fascia is living, innervated connective tissue, mechanically integrated with muscles and other structures and capable of adapting to changes in loading and movement. The thoracolumbar fascia may therefore contribute to low back pain in some people.
⚠️ But there are some important limitations.
Most of the evidence was cross sectional. It tells us that groups of people with and without low back pain can differ, but it cannot tell us which came first.
A mechanically different TLF could potentially contribute to nociceptive input. Equally, persistent pain may change how someone moves, loads their back, uses their muscles and participates in physical activity. Connective tissues may then adapt to that changed mechanical environment.
Wilke and colleagues acknowledge that the current evidence cannot establish whether the fascial alterations cause low back pain or occur as a consequence of it.
There are also limitations hidden within some of the headline findings.
The apparently large difference in TLF stiffness came from only three studies using different ultrasound based methods. One of those studies did not independently find a significant stiffness difference between people with low back pain and controls. So there is an interesting signal here, but considerably less evidence behind it than the headline might suggest.
🔎 The sliding and gliding story is even more interesting.
One of the most influential studies was Langevin et al. in 2011. It found reduced thoracolumbar shear strain in people with chronic low back pain. This finding has frequently been used to support the idea that fascia becomes less mobile or restricted in people with back pain.
But even Langevin proposed several possible explanations, including connective tissue changes and altered movement or neuromuscular control. The study demonstrated an association. It did not establish that reduced fascial movement caused the pain.
More recent research has complicated that picture.
Tomita et al. reported in 2025 that people with nonspecific low back pain actually had greater, rather than reduced, ultrasound measured TLF shear strain compared with controls. There was considerable overlap between the groups and TLF thickness was not significantly different.
So we now have one study finding reduced shear movement and another finding increased shear movement.
Wilke’s 2026 review brings these contradictory findings together and concludes that there is currently no consistent evidence showing whether increased or decreased TLF shear mobility characterises low back pain.
Langevin’s study has therefore not suddenly become wrong. It has become one finding within a larger and more complicated evidence base. That matters because reduced fascial sliding has been held onto for many years as evidence that painful fascia is restricted or stuck.
đź“š Then another study from Tomita and colleagues appeared in June 2026.
This study investigated whether treatment could change ultrasound measures of TLF behaviour. Chiropractic care and massage were followed by measurable changes in shear strain. However, the massage findings came from a subsequent within person treatment phase rather than the original randomised comparison, so they should be interpreted cautiously.
Importantly, the researchers did not find clear corresponding changes in the ultrasound measures of fascial microstructure, and changes in shear strain were not significantly associated with improvements in disability.
This is where things become particularly interesting for manual therapists.
🙌 Imagine somebody arrives with low back pain feeling stiff and guarded. Movement is uncomfortable, they brace their back and they are cautious about bending.
They receive manual therapy. Their pain settles somewhat, they feel more comfortable and movement feels safer.
They may now guard less.
Their muscle activity may change.
Their perception of stiffness may change.
They may move further or differently because they are less apprehensive about movement.
If we subsequently measure what happens between the muscles, aponeuroses and fascial layers during movement, the sliding, gliding and deformation responses may also be different.
That does not necessarily mean the therapist structurally changed or “released” the fascia.
The person’s experience and protective behaviour may have changed first. Their movement and muscle behaviour may then change, which could influence the mechanical behaviour subsequently measured with ultrasound.
đź’ˇ And there is an important distinction here between feeling stiff and having mechanically stiff tissue.
Perceived stiffness is an experience. It can change with pain, expectation, fatigue, confidence, threat and movement. Someone reporting that their back feels dramatically less stiff after treatment does not demonstrate that collagen, fibrosis, fascial thickness or the material stiffness of the TLF has changed.
Likewise, a change in ultrasound measured shear behaviour after treatment does not tell us, by itself, what caused that change.
Fascia does not function independently of the muscles, nervous system and movement surrounding it.
And that brings us back to low back pain itself.
Around 90% of low back pain is classified as nonspecific, meaning that a single identifiable pathology cannot adequately explain the person’s symptoms.
Previous injury, tissue loading, physical capacity, muscle behaviour, movement, nociceptive sensitivity, sleep, general health, stress, expectations, fear, work demands and previous episodes of pain can all contribute.
Fascia belongs within that bigger picture.
New research gives us good reason to continue studying it. People with low back pain may have measurable differences in TLF thickness, echogenicity and mechanical behaviour. Fascia may contribute nociceptive input, adapt to loading and movement, and its mechanical behaviour may change following treatment.
But none of that takes us back to a simple model in which someone’s back hurts because their fascia is thick, stiff or stuck and therefore needs manually releasing.
đź“Ś Finding different fascia in people with pain does not tell us that fascia caused their pain.
Feeling less stiff after bodywork does not mean the fascia became less stiff.
Moving differently after treatment can change tissue mechanics without the tissue having been structurally released.
And perhaps the most important one:
👉 Pain improving after fascial bodywork is evidence that the person improved. It is not evidence that you fixed their fascia.
Fascia may be part of the story. It does not have to be the cause of the story.
