Lower Back Pain From Sitting All Day: An Osteopath's Guide

If you spend most of your working day at a desk, you've probably felt it — that dull ache in your lower back that builds through the afternoon, or the stiffness that hits when you finally stand up after a long meeting. This is one of the most common things I treat in patients working around London Bridge and Islington, and it's rarely as simple as "sitting is bad for you."

Why sitting all day actually causes back pain

Sitting itself isn't the villain — it's how most of us sit, for how long, without much variation. A few things tend to compound over a working day:

• Your hip flexors shorten. Long periods seated gradually tighten the muscles at the front of your hips, which pulls on your pelvis and increases strain on your lower back.

• Your core switches off. Sitting doesn't require much from your deep abdominal and back muscles, so they gradually lose some of the support they'd normally provide your spine.

• Your posture drifts. Few people sit perfectly upright for eight hours. Slouching forward, twisting toward a second monitor, or perching on the edge of a chair all place uneven load on your lower back over time.

• You stop moving. Your spine and the discs between your vertebrae rely on movement to stay well-nourished. Long, unbroken stillness reduces this, which can leave the area feeling stiffer and more sensitive.

None of these on their own is usually the full explanation — it's typically a combination, built up over months or years, rather than one single cause.

Why it often gets worse before you notice it

A lot of people don't clock this kind of back pain until it's already fairly established, because it builds gradually rather than announcing itself. It's common to notice it first as end-of-day stiffness, then as discomfort that starts earlier in the day, and eventually as pain that's there most of the time, including outside of work. The earlier it's looked at, generally, the more straightforward it is to resolve.

What I look at when treating desk-related back pain

When someone comes to me with this kind of pain, I don't just treat the lower back in isolation. I'll usually assess:

• How your hips and pelvis are moving, since tight hip flexors are often a major contributor

• Your upper back and neck, since poor desk posture rarely affects just one area

• How you're actually sitting and moving through your working day

• Whether there's an old injury or asymmetry elsewhere that's quietly loading your back more on one side

Treatment typically combines hands-on techniques — soft tissue work, joint mobilisation, and stretching — to ease the immediate tension and restore movement, alongside practical changes to how you sit and move during the day.

What actually helps, beyond treatment

A few things make a real difference for most people with this kind of back pain, alongside hands-on treatment:

Move more often, not necessarily more intensely. Standing up, walking to get water, or simply changing position every 30–45 minutes does more for this type of pain than most people expect — it doesn't need to be a workout.

Build core and hip strength. This is where I often bring in Pilates-based rehabilitation alongside treatment. Manual therapy is effective at easing pain and restoring movement, but building the strength to actually support your spine through a long sitting day is a longer-term project — one that meaningfully reduces how often the pain comes back.

Set up your workspace properly. Screen at eye level, feet flat on the floor, lower back supported — small adjustments, but they add up over a full working week.

Stretch your hip flexors specifically. Since these are often the main culprit, targeted stretching here tends to help more than generic back stretches alone.

When to get it looked at rather than waiting it out

It's worth booking an assessment if the pain is persistent, getting gradually worse, affecting your sleep, or if you're noticing any numbness, tingling, or pain running down your leg — that last one can sometimes point to something involving a nerve, which is worth having properly assessed rather than managed with stretching alone.

Frequently Asked Questions

• Can sitting all day really cause lower back pain?

  Yes. Prolonged sitting can shorten the hip flexors, reduce core muscle activation, and encourage poor posture, all of which increase strain on the lower back over time.

• How often should I get up if I have a desk job?

  Aiming to stand, walk, or change position roughly every 30–45 minutes is a reasonable target for most people, even if it's just a short walk to get water or stretch.

• Is it better to sit up straight all day to avoid back pain?

  Not necessarily. Staying in any single position for too long, even a "correct" one, can still cause stiffness. Regular movement and position changes matter more than maintaining perfect posture constantly.

• Will a standing desk fix desk-related back pain?

  It can help by encouraging more variation through the day, but standing all day brings its own strain. Alternating between sitting and standing tends to work better than switching to one fixed position.

• When should I see an osteopath for back pain instead of waiting for it to improve on its own?

  If the pain is persistent, worsening, affecting your sleep, or accompanied by numbness or tingling down your leg, it's worth having it assessed rather than waiting it out.

Ready to book an assessment? I treat patients in London Bridge every Tuesday and Thursday, and in Islington every Wednesday. Book online here.