Clinical name: Postural / sustained-load related back pain

Direct answer

Back pain that builds throughout the day at a desk usually comes from prolonged, sustained postures rather than any one position being inherently “bad” — the spine and its supporting muscles are built to move, and holding any single position for hours at a time reduces their tolerance over time. Regular movement and postural variety generally matter more than finding the one “correct” sitting position.

What this means

There’s no single perfect desk posture that prevents back pain for everyone — what matters most is avoiding prolonged static loading in any one position, since muscles and joints held still for long periods fatigue and become less tolerant of load.

Why does sitting cause back pain if my posture is okay?

Even a good posture becomes a problem when it’s held without variation for hours — sustained loading, regardless of position, reduces tissue tolerance over time. This is why people with textbook posture can still develop desk-related back pain, and why frequent movement matters more than perfecting a static position.

What tends to aggravate it, and what helps ease it?

Long, uninterrupted sitting, a chair or desk setup that doesn’t support your natural spinal curves, and mental stress (which increases muscle tension) all tend to aggravate desk-related back pain. Regular movement breaks (standing, walking, or simply changing position every 30 to 45 minutes), a supportive chair setup, and general conditioning of the back and core all help.

Does a standing desk fix the problem?

Not on its own — standing still all day carries its own load-tolerance issues, just distributed differently. Alternating between sitting and standing, combined with regular movement breaks, tends to work better than switching to one static position over another.

What role does core and back strength play?

A stronger, more conditioned back and trunk can tolerate sustained postures for longer before symptoms develop, which is why a general strengthening program often reduces desk-related back pain even without changing your workstation at all (see our related article on core strengthening).

What’s the single most useful change most people can make?

Building in regular movement breaks throughout the day — even brief ones — tends to make more difference than any specific chair, desk height, or posture correction on its own.

Who’s behind this advice

Reviewed by: Core Healthcare Banyo 2026
Clinic services: Assessment and diagnosis of back pain and related symptoms (including leg, buttock and pelvic pain); manual therapy; individualised treatment and management planning based on your assessment findings; Pilates-based rehab classes, strengthening and exercise rehabilitation, including musculoskeletal and sports rehab; posture and workstation advice; women’s health physiotherapy for pregnancy-related back and pelvic pain.

Related reading

• Will core strengthening actually help my back pain?
• Upper back or shoulder blade pain — what’s causing it?
• My back pain keeps coming back — how do I stop the cycle?

Next step

Back pain that’s left to “settle on its own” often takes longer to resolve and comes back more easily than back pain that gets an early, targeted assessment. A proper assessment identifies exactly what’s driving your symptoms and gets you started on a specific plan — not just advice to rest and see how it goes. Book a back assessment with a physiotherapist at any of Core Healthcare’s seven clinics across Brisbane, Logan, the Gold Coast and Northern NSW, or ask your physio about this at your next session.