How to Fix Back Pain From Desk Work
A London PT's Guide.. LizMarsland · LMFIT Personal Training Sports Science Graduate · 20+ Years Coaching · London
Back pain is the single most common complaint I hear from my London clients. Finance professionals, lawyers, consultants - brilliant people spending 9+ hours a day at a desk, then wondering why their lower back is screaming by the time they get home, and why a 1 hour smash at the gym afterwards won’t help them. Here’s what I tell them.
Why Desk Work Destroys Your Back (& More!)
The human body was not designed to sit in a chair for eight hours. Your spine is built for movement - for loading, rotating, extending, compressing, and decompressing throughout the day. Your body adapts the environment you put it in. So, when you park yourself in a fixed position and barely move for hours on end, several things start to go wrong simultaneously.
Your hip flexors shorten and tighten, pulling the pelvis into an anterior tilt. Your glutes switch off - they stop firing because they don’t need to. Your thoracic spine (mid-back) stiffens into a rounded position, and your deep core stabilisers - the muscles that should be holding your lumbar spine - simply stop doing their job.
The result? Your lower back is left to do everything on its own, and it wasn’t built for that load. Over time, this leads to aching, stiffness, disc irritation, and in more serious cases, nerve symptoms down the legs.
“Sitting is the new smoking for amount of health risks!” - from joint pain, reduced blood flow delivering oxygen & nutrients, headaches, weak core, stomach issues, reduced motility for digestion .. we are all at risj if we don’t start moving more regularly.
PT Insight
Most desk-related back pain isn’t caused by a single dramatic injury - it’s the slow accumulation of hours, days, and months spent in a position your body wasn’t meant to sustain. The good news is that it’s almost always reversible. That’s where I come in.
The 5 Most Common Mistakes Desk Workers Make
Sitting with a posterior pelvic tilt. Slumping so the lower back rounds and the pelvis tucks under. This loads the lumbar discs unevenly and switches off your lumbar extensors.
Craning the neck forward. Every inch your head moves forward of your shoulders adds roughly 10 lbs of load through the cervical spine, and pulls on the neck muscles attached to your occipital, base of the skull. Causing headaches, neck & shoulder issues.
Never leaving the chair. No water breaks, no walking, no movement for hours. Static loading is cumulative -0 the longer you sit, the worse the compression.
Sitting on soft, unsupportive surfaces. Sofas and cheap chairs let the pelvis drop and rotate, making neutral spine almost impossible to maintain without effort.
Joints in awkward angles for hours. Crossed legs, wrists upwards at laptop, twisting to see screens, hip to knee slope adding pressure to front of knee.. all lead to ligament strain and issues such as carpal tunnel syndrome.
Relying on stretching alone. Stretching the back feels good but does very little if the underlying cause is weakness. You need to build strength, not just release tension.
“Most of my clients don’t have a pain problem - they have a movement problem. Fix how you move and the pain resolves itself.”- Liz, LMFIT Personal Training
Set Up Your Desk Like a PT Would
Before we talk about exercises, we need to talk about your environment. If your setup is wrong, no amount of movement will fully compensate. Here’s what to check:
Your Desk Posture Checklist
Feet flat on the floor (or a footrest)
Knees at roughly 90° or slightly lower than hips
Pelvis in neutral - not tucked, not over-arched
Lower back supported by chair lumbar or a small cushion
Screen at eye level - not looking down at a laptop
Elbows at 90°, shoulders relaxed - not hunched
Knees at right angle, use a foot step if needed
Head directly over the shoulders, ears aligned with hips
A reminder to stand up every 45–60 minutes
Stretch and take deep breaths regularly. Try box breathing. Release the jaw. Twist stretch around the chair and use exercise bands regularly to move the shoulders well.
If you’re using a laptop without a separate monitor and keyboard, your setup is compromised by design. Elevate the laptop screen and plug in an external keyboard and mouse - this single change makes a significant difference to how your thoracic spine and neck are loaded throughout the day.
The 6 Exercises That Actually Fix It
These are movements I prescribe regularly to my desk-working clients. Think about taking movement or stretch “snacks” at least every 30mins to give the body and mind the oxygen and blood flow it needs. They target the three main drivers of desk-related back pain: hip flexor tightness, glute inhibition, and weak deep core stability. You don’t need a gym - just 15 minutes, a mat, and the floor.
Dead Bug
Lie on your back, arms and legs raised. Lower opposite arm and leg slowly while pressing your lower back into the floor. The anti-extension core exercise.
3 × 8 each side · Daily
Hip Flexor Stretch (Kneeling Lunge)
Kneel on one knee, tuck the pelvis slightly, and gently shift forward until you feel the front of the back hip. Hold without arching the lower back.
3 × 45 sec each side · Daily
Glute Bridge
Lie on your back, feet flat, drive the hips toward the ceiling by squeezing your glutes - not by extending the lower back. Hold at the top for 2 seconds. Even stand up and don on a chair using one leg only 10 times each side.
3 × 12 reps · Daily
Cat–Cow Mobilisation
On all fours, move slowly between a rounded spine (cat) and an extended spine (cow). This decompresses the vertebrae and restores spinal mobility.
2 × 10 slow reps · Daily
Bird Dog
From all fours, extend the opposite arm and leg simultaneously, keeping the hips level. Targets the multifidus and deep spinal stabilisers.
3 × 8 each side · 3× per week
Thoracic Rotation (Seated)
Sit on a chair, cross arms over your chest, and rotate your upper body left and right slowly. This unlocks the mid-back that gets stiff from sustained flexion.
2 × 10 each side · Daily
Important Note
If you’re experiencing sharp, shooting, or radiating pain down one or both legs, numbness, or tingling, please see your GP or a physiotherapist before starting any exercise programme. These exercises are for the typical muscular tension and postural ache that desk work causes - not for disc herniations or nerve compression requiring medical assessment.
Build Movement Into Your Workday
The exercises above help enormously - but they’re fighting a losing battle if you go straight back to eight hours of uninterrupted sitting. The most powerful thing you can do is change the frequency of your movement, not just the quality of it. Movement snacks are your best friend!!
The 45-Minute Rule
Set a timer. Every 45 minutes, get up for 2–3 minutes. Walk to the kitchen, do 10 squats, stand at the window. It doesn’t need to be a workout - it just needs to interrupt the sustained compression. Over a working week, this adds up to a profound reduction in cumulative spinal load.
Walk More Than You Think You Need To
I ask my desk-worker clients to aim for a minimum of 8,000 steps on working days. In London, this is often more achievable than you’d think - get off the Tube one stop earlier, take the stairs, walk to a coffee shop further away. Walking is one of the most evidence-supported interventions for chronic low back pain in existence.
Consider a Standing Desk - Properly
Standing desks are valuable but frequently misused. Standing for eight hours is just as problematic as sitting for eight hours. The goal is alternating - sit for 45–60 minutes, stand for 20–30, repeat. If you stand, invest in an anti-fatigue mat and check that your monitor and keyboard are at the right height for your standing posture, not your sitting one.
When to Get Professional Help
Self-management works for most desk-related back pain - but some situations call for expert assessment. See a professional if:
Pain has persisted for more than 6–8 weeks with no improvement
You have radiating pain, numbness, or tingling into the legs
Pain is worse at night or when lying down (this can indicate non-mechanical causes)
You’ve had a recent fall, accident, or significant impact
A personal trainer with experience in injury rehabilitation - working alongside your physio or GP where needed - can build you a structured programme that not only reduces your pain but builds the strength to prevent it returning. That’s exactly the kind of work I do with my London clients, both one-to-one and in corporate wellbeing settings.
Ready to Sort Your Back for Good?
Book a free initial consultation with Liz. Whether you train one-to-one or are looking at a corporate wellbeing programme for your team, let’s build a plan around your life.
Visit LMFIT.uk Or WhatsApp Liz directly via the website · Instagram @lmfit_trainer