The Desk Worker's Pain Guide: What Eight Hours of Sitting Actually Does
Medically reviewed by Cameron Hemmert on
Most of the desk-related pain we see at Marrickville arrives with the same story attached. Nothing happened. There was no lifting injury, no fall, no moment where something went wrong. The person simply noticed one Tuesday that their neck had been aching for a fortnight, and it has been getting slowly worse since.
That absence of a moment is the most useful diagnostic detail in the whole history. It tells us this is a loading problem rather than a tissue injury, and loading problems respond to different things than injuries do.
What eight hours of sitting actually does
Sitting is not inherently harmful. Sustained anything is the problem, and a desk job is very good at producing sustained anything.
Hold a joint near the end of its available range for long enough and the surrounding tissue adapts to that position. The muscles that are held short become comfortable short. The ones held long become inefficient at generating force. Neither of these is damage, and both are reversible — but while they persist, ordinary movements start to load structures that were not designed to carry them.
Three patterns account for most of what walks through our door:
The neck and upper back. Head weight is roughly five kilograms, and it is balanced on the cervical spine like a bowling ball on a broomstick. When the head drifts forward of the shoulders — which is what happens when you lean in toward a screen that is slightly too low or slightly too far away — the muscles at the back of the neck have to work continuously to stop it falling further. They are not built for continuous work. They are built for intermittent correction.
The lower back. Seated, the pelvis tends to roll backwards, which flattens the natural lumbar curve and shifts load from the joints at the back of the spine onto the discs at the front. Held for an hour this is unremarkable. Held for six hours a day, five days a week, for years, it is the single most common contributor to the desk-worker back pain we assess.
The wrists and forearms. Typing is a low-force, high-repetition activity performed with the wrist held in one position. The forces involved are tiny. The repetition count is enormous.
The fixes that are actually worth your time
There is a large industry selling solutions to this problem, and the evidence base underneath it is thinner than the marketing suggests. Three things genuinely move the needle.
Change position more often. This is the one that matters most and costs nothing. The specific interval is less important than the principle: no position should be held long enough to become the default. Every half hour or so, change something. Stand up, shift how you are sitting, walk to get water.
Get the screen height right. The top of the screen should sit at or just below eye level, roughly an arm’s length away. This is a one-time, twenty-second adjustment that removes a load your neck is otherwise carrying for the rest of your working life. It is the highest-value change on this list relative to the effort involved.
Support the lower back. A chair with lumbar support you actually use, or a rolled towel behind the small of your back, keeps the pelvis from rolling back and preserves the lumbar curve. Cheap, and effective.
What is not especially worth your time: elaborate stretching routines performed once a day, posture-correcting braces, and most ergonomic gadgets marketed on the strength of a single testimonial. A stretch performed once at 5pm does not undo eight hours of sustained position. Movement spread across the day does.
The one thing people get wrong
Almost everyone treats desk pain as a strength problem — the assumption being that if the muscles were stronger, they would cope.
Strength helps, and we prescribe it. But the primary problem is exposure, not capacity. A muscle held in a shortened position for six hours does not become sore because it is weak; it becomes sore because it has been held in a shortened position for six hours. Building capacity without reducing exposure means you are stronger and still sore.
Reduce the exposure first. Build the capacity alongside it.
When desk pain is not just desk pain. See a GP promptly, rather than an allied health practitioner, if you have any of the following:
- Numbness, pins and needles or weakness in an arm or hand that is getting worse, or affects your grip
- Pain that wakes you consistently at night and is not relieved by changing position
- Unexplained weight loss, fever, or a history of cancer alongside new spinal pain
- Any loss of bladder or bowel control, or numbness around the groin or inner thighs — this needs emergency assessment the same day
What an assessment actually adds
If the setup is reasonable and the pain has persisted past two or three weeks, an assessment is worth having — not because the problem is likely to be serious, but because the useful information is specific to you.
What we are looking for is which structures are actually carrying the load and which ones have stopped contributing. That is not something you can work out from an article, because it varies enormously between two people with identical jobs and identical symptoms. One person’s neck pain is a thoracic mobility problem; another’s is a deep neck flexor endurance problem. They look the same from the outside and need different work.
For most desk-related presentations, a small number of sessions to establish what is going on and what to do about it is enough. The rest is exposure management, and that happens at your desk rather than in our clinic.
Common questions
- How often should I get up from my desk?
- Aim to change position every 30 to 45 minutes and get fully out of the chair at least once an hour. The exact interval matters less than the variety — the problem is sustained loading in one position, not sitting itself.
- Will one good stretch fix my desk pain?
- Rarely. A stretch gives short-term relief because it briefly changes the load on tissue that has been held still. Lasting change comes from altering the setup and the frequency of movement so the tissue is not held in that position for hours in the first place.
- Is standing at a desk better than sitting?
- Not automatically. Standing all day produces its own problems, including foot, calf and lower back discomfort. Alternating between the two is better than either one alone.
- Should I see a physiotherapist or just change my chair?
- Change the setup first — it is free and it addresses the cause. If pain persists beyond two to three weeks despite a reasonable setup, or if you have numbness, pins and needles, or weakness, that warrants an assessment.
