Occupational Health8 min read24 August 2026

Five Explanations Your Occupational Health Files May Still Be Built On

Deconditioning, loose collagen, anxiety and somatisation each kept turning out to have a measurable mechanism underneath. The reports written on the old assumptions are the ones sitting in your files.

Occupational health advice is only as current as the science it was written against. Five explanations that were standard a few years ago have been substantially undercut by recent work, and each one produced a specific kind of recommendation: increase activity gradually, no objective findings, consider a psychological referral. If those phrases appear in your files, this is what has changed underneath them.

What is going on

Deconditioning Does Not Explain The Muscle

Long COVID and ME/CFS muscle tissue was tested directly against muscle made deliberately unfit. It did not match.

Researchers at VU Amsterdam compared muscle properties in long COVID and ME/CFS against muscle changes produced by prolonged bed rest, and published the comparison in Nature Communications. The patterns differed. The problem is not muscle that has gone unused.

→If a recommendation rests on deconditioning, it rests on a mechanism that has now been tested directly and did not hold. Ask for the reasoning, not just the conclusion.

Hypermobility Has A Genetic Signature Beyond Collagen

Hypermobile Ehlers-Danlos syndrome was filed under loose collagen. The genome says the immune system is involved too.

Genetic work published in Genes describes a multi-system architecture for hypermobile Ehlers-Danlos syndrome, implicating immune and inflammatory pathways alongside connective tissue. That explains why the symptom picture is rarely confined to joints.

→Expect a multi-system picture and handle it as one case. Separate referrals per symptom generate administrative cost without producing an adjustment that works.

Small Fibre Neuropathy Is Findable, With The Right Test

Nerve pain with normal standard results is not the same as nerve pain with no cause.

Clinical work on small fibre neuropathy sets out how it is identified and managed, and the point that matters for an employer is procedural: standard nerve conduction studies can be normal while a skin biopsy or specialist testing finds the abnormality. Normal results on the usual tests are not the end of the question.

→No objective findings means the test performed found nothing, not that there is nothing there. An adjustment decision resting on that phrase is resting on an absence of evidence.

Mast Cell Activation Syndrome Has Consensus Criteria

A condition once treated as fringe now has agreed diagnostic criteria with six years of use behind them.

Work led by Afrin and colleagues reviews the global consensus-2 diagnostic criteria for mast cell activation syndrome at the six year mark. Allergic type reactions to food, temperature, stress or exertion that used to be treated as anxiety now have a framework behind them.

→Environmental triggers are worth taking at face value. Scent free policies, temperature control and remote options are cheap, and they address a documented mechanism.

Fibromyalgia Has A Gut Microbiome Thread

A condition routinely described as psychosomatic keeps producing measurable biological findings.

A scoping review in the Journal of Orthopaedic Case Reports examines the gut microbiome in fibromyalgia, adding another measurable thread to a condition long explained as stress or somatisation. The mechanism is still being mapped, and it is a mechanism.

→Somatisation is doing less explanatory work each year. Adjust on the functional impact described, which is the thing you can act on regardless of mechanism.

What to do about it

Adjust on function, and let the diagnostics continue in parallel.

Muscle biopsies, genome scans, nerve fibre counts, a diagnostic criteria review and gut microbiome work all point one direction: symptoms once explained as deconditioning, bendiness, anxiety or somatisation keep turning out to have a measurable mechanism once somebody looks with the right tool. For an employer the practical conclusion is procedural rather than clinical. Decide adjustments on functional impact, ask occupational health for the reasoning behind a recommendation as well as the recommendation, and stop treating an absence of findings as a finding.

The reframe

USUAL FRAMING

"There are no objective findings, so there is nothing to adjust for"

MORE USEFUL

"We adjust on the functional impact described, and the diagnostics can continue in parallel"

A specific test tends to get further than a general description, so an employee who asks for one is usually working the problem rather than avoiding it.

Capacity tracking stays useful while the mechanism behind a crash is still being mapped, because the pattern is actionable before the cause is named.

Symptoms that appear to belong to separate specialists may share one underlying system, so one coordinated case costs less than five referrals.

The business case

Five explanations that shaped a generation of occupational health advice have each been undercut by measurement. The employer consequence is not medical: it is that recommendations resting on those explanations produce adjustments that do not work, cases that reopen, and files that escalate. Deciding on functional impact removes that failure mode entirely.

A genetic signature does not undo years of being told it was all in the mind, and none of this makes managing several systems at once straightforward. What it does mean is that the next occupational health conversation can start from here is the test for that, rather than from there is nothing to find.

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