Pacing Is The Clinical Recommendation. Your Phased Return May Still Reward Pushing Through
NICE dropped graded exercise therapy for ME/CFS in 2021. A return built on steady weekly increases regardless of symptoms is running against the current evidence.
If you manage absence, chronic fatigue conditions are the cases that come back. Someone returns, does well for a fortnight, then drops out again, and the file starts to read as unreliability. The research on what is happening underneath that pattern has moved substantially, and one national guideline body has formally reversed itself. Here is what changed, and what it means for how you write a phased return.
What is going on
Post-Exertional Malaise Has An Objective Signature
The crash a day after overexertion can be measured, which changes what counts as evidence in a case.
Two day cardiopulmonary exercise testing, where a patient is tested and then retested the following day, repeatedly shows a pattern in ME/CFS and long COVID that healthy control groups do not show: performance holds reasonably on day one, then drops sharply on day two. That gap is an objective signature of post-exertional malaise.
→Normal routine test results are not evidence of full capacity in these conditions. Treating them that way is how a case escalates into a grievance.
Long COVID Put Dysautonomia On The Map
A nervous system that mismanages heart rate and blood flow on standing is now a mainstream clinical consideration.
A meaningful share of long COVID patients have been diagnosed with POTS, postural orthostatic tachycardia syndrome, or other forms of dysautonomia. The scale of long COVID did what decades of smaller case studies could not: it pushed autonomic dysfunction into ordinary clinical awareness.
→Seated work, remote days and control over the commute are not perks in these cases. They are the adjustment, and they are close to free.
The Hypermobility, POTS And MCAS Cluster
Three diagnoses that arrive from three specialists keep turning out to be one system, and often sit alongside neurodivergence.
Clinicians increasingly describe a recurring cluster: hypermobile Ehlers-Danlos syndrome or hypermobility spectrum disorder, POTS, and mast cell activation syndrome. Research on joint hypermobility has also found more overlap than expected with anxiety and with autistic and ADHD traits, suggesting a shared thread under conditions that used to be managed in isolation.
→Handle the case as one person with fluctuating capacity rather than as a sequence of unrelated episodes. It costs less administratively, and it produces an adjustment that holds.
Fibromyalgia Is A Signal Problem, Not A Tissue Problem
Imaging keeps finding the same thing: normal tissue, amplified signal.
Pain research on fibromyalgia points consistently to central sensitisation, the central nervous system turning up the volume on pain and sensory input rather than damage in the muscles or joints. Imaging has found measurable differences in how pain signals are processed even where the tissue tested shows nothing abnormal.
→The sensory environment is a legitimate adjustment target with a mechanism behind it. Lighting, noise and a predictable desk are cheap, and they are the adjustment.
Pacing Beat Pushing Through, Officially
NICE revised its own guidance once the evidence caught up with what patients had reported for years.
For years some ME/CFS patients were formally advised to use graded exercise therapy, steadily increasing activity regardless of symptoms. Following mounting evidence of harm, the UK guideline body NICE revised its recommendations in 2021, dropping graded exercise therapy in favour of pacing: staying within an energy envelope rather than pushing past it.
→If your phased return template is a fixed ladder, it encodes advice a national guideline body has withdrawn. Rebuild it around an envelope that can hold steady or step back without triggering a process.
What to do about it
What to do about it
Design the return around an envelope, and expect it to fluctuate.
Post-exertional malaise, dysautonomia, the hypermobility cluster and central sensitisation are measurable physiological processes rather than a motivation problem. That has three practical consequences: a phased return works better as an envelope than a ladder, absence triggers that count clusters of single days will flag these employees as a concern exactly when they are pacing correctly, and a normal test result is not evidence of capacity. Getting those three right removes most of the friction from the cases that currently take months.
The reframe
"Build them back up gradually and consistently, and review if progress stalls"
"Plan around the envelope they have, expect it to move, and make holding steady a permitted outcome"
Energy budgeting is reflected in clinical guidance, so an employee tracking capacity is following advice rather than avoiding work.
A crash a day or more after exertion is a documented pattern. An absence trigger that counts single days penalises exactly that pattern.
Symptoms that do not appear on standard tests can still have a measurable cause, so adjust on function rather than waiting for proof.
The business case
An objective marker for post-exertional malaise, dysautonomia entering mainstream practice, the hypermobility cluster, central sensitisation imaging, and the withdrawal of graded exercise therapy all point one way. The employees whose files read as inconsistent are describing a documented physiological pattern, and your absence and return to work processes are the cheapest thing in this list to change.
Two documents are worth rereading with this in front of you: your phased return template and the trigger points in your absence policy. If one prescribes fixed weekly increases while the other counts clusters of single days as a concern, they are working against each other and against the evidence.