The biggest difference between a body in pain and a body without it is not in the tissue

A new pooled analysis in The Journal of Pain asked a question that single domain research keeps failing to answer. When you compare people living with musculoskeletal pain against people who are not, which measurements actually separate the two groups, and by how much?

The tissue measures came last.

The team, working out of Hochschule Bochum University of Applied Sciences and the German Sport University in Cologne, gathered 118 studies covering 11,822 adults across four conditions: fibromyalgia, knee osteoarthritis, low back pain, and neck pain. Every outcome was sorted into one of five domains, brain, sensory, psychological, motor, and tissue. Rather than compare each domain in isolation, they ran multivariate models that estimated all of them jointly while accounting for the fact that a single study often contributes several outcomes at once. Psychological measures showed the largest standardized difference from controls at g = 1.08 (95% CI 0.94 to 1.22), followed by sensory at g = 0.85 (0.61 to 1.08). Motor came in at 0.66, brain at 0.59, and tissue last at 0.30, with a confidence interval running from 0.05 to 0.55 that very nearly touches zero (The Journal of Pain, 2026).

The certainty ratings deserve as much attention as the ordering, and the authors are straight about them. Only the psychological and sensory estimates carried moderate certainty under GRADE. Brain was rated low. Motor and tissue were both rated very low. So this is not a finished ranking of what matters in pain. It is a map of where the evidence is currently strongest, and the strongest evidence sits in the two domains that describe how a person is interpreting and sensing, not what their tissue looks like. The review was registered in advance on the Open Science Framework (OSF, 2026), which is worth noting given how easily an analysis like this could be steered after the fact.

None of this is new in kind. We have known for a decade that structural findings are a poor guide to who hurts. Brinjikji and colleagues found disk degeneration in 37 percent of asymptomatic 20 year olds, rising to 96 percent of asymptomatic 80 year olds, with disk bulges in 30 percent and 84 percent of the same groups (AJNR, 2015). What is new here is the relative scale. Earlier work told us tissue findings are unreliable. This one puts a number on how unreliable, next to everything else we might have measured instead. One further detail is easy to skip past: the pattern was not uniform across diagnoses, and fibromyalgia showed larger differences across the domains than the other three conditions did. That fits what most of us see clinically, and it argues against treating the four as one population.

For anyone working with these patients between appointments, the sensory finding is the practical one. Psychological measures separated the groups most, and there is already a well developed literature on what to do with that. Sensory came second, ahead of motor and well ahead of tissue, and it is the domain most likely to be left alone once the explaining has been done and the strength work is under way. Sensory discrimination is trainable, it costs nothing, and it does not compete with anything else on the plan. It just rarely gets an owner.

That is the gap the Feldenkrais Method® has always worked in. An Awareness Through Movement® lesson is, structurally, a long sensory discrimination task with a small movement attached, and the movement is kept small precisely so that the sensing stays possible. Nobody is claiming a five minute exercise moves a Hedges g. But if the sensory domain separates these groups more sharply than the motor or tissue domains do, then a task that probes sensing directly has a stronger claim on the week than it usually gets.

Here is the version I hand out. It is deliberately built to test rather than to fix, and the reading it produces is the point. Go only where it feels easy, pleasant, and comfortable.

What makes this worth five minutes is not the change itself, which is often small. It is that the second reading is almost never identical to the first, and the person taking it knows that before anyone tells them. For someone who has spent two years being told their scan looks fine while feeling anything but, a small verified shift in their own sensing is a different category of evidence from a reassuring conversation. It comes from them. Our Feldypedia entry on chronic lower back pain goes into why that distinction tends to hold, and the entry on proprioception decline with age covers how the sensing side quietly narrows over the years even without pain in the picture.

Work like this sits alongside physiotherapy and the rest of clinical care rather than substituting for any of it, and the audio guided lessons in the Feldy online movement program exist mainly to make the format repeatable at home once someone has had it demonstrated. Yoga, Pilates and Tai Chi arrive at attention through a different mechanism, and each has its own strengths; our comparison of the Feldenkrais Method and yoga sets out where the two actually part company.

The part I keep turning over is what the ranking implies about the order of a session. If the domains that separate these bodies most are the ones concerned with interpreting and sensing, then the sensing is not the warm up before the real work. Some weeks it is the work, and the tissue was never the thing that was going to answer.