By mid-afternoon your lower back is aching, and shifting in your chair only helps for a minute. If sitting all day leaves your back sore, you are far from alone. Lower back pain is one of the most common problems for desk and remote workers, and in most cases it comes from how you sit, not from anything serious. Here is why sitting hurts your back and what actually helps.
Why does sitting all day cause lower back pain?
When you sit, especially slumped, your lower back loses its natural inward curve and rounds into a C-shape. That puts extra pressure on the discs and strains the muscles that support your spine. Do it for hours and those muscles fatigue, which is the ache you feel. Sitting still for long stretches makes it worse, because your back never gets a break.
- Slumping that flattens the lower-back curve.
- No lumbar support, so nothing holds your spine upright.
- A screen too low, which pulls your whole posture forward.
- Sitting frozen for hours without moving.
How to relieve lower back pain from sitting
1. Support the curve of your lower back
The single most effective change is supporting your lumbar curve so your spine stacks upright instead of collapsing. Use a chair with good lumbar support or add a cushion behind your lower back.
2. Sit stacked, not slumped
Aim for feet flat on the floor, knees roughly level with your hips, and your weight balanced over your sit bones rather than rolled back onto your tailbone.
3. Raise your screen so you sit tall
A low screen makes you lean forward, which drags your lower back out of position. Raising your screen to eye level with a laptop stand helps your whole posture stay upright.
4. Break up your sitting
Stand up, walk, or gently stretch every 30 to 45 minutes. Movement is what your back craves after being still.
Slumped vs supported
| Hard on your back | Easier on your back |
|---|---|
| Slumped, rounded lower back | Lumbar curve supported |
| Leaning toward a low screen | Sitting tall, screen at eye level |
| Same position for hours | Regular movement breaks |
When to see a professional
Most sitting-related back pain eases as your posture and setup improve. But if the pain is severe, shoots down your leg, or does not settle with better ergonomics and movement, see a doctor or physiotherapist. This article is general information, not medical advice.
Frequently asked questions
Why does my lower back hurt after sitting all day?
Sitting, especially slumped, flattens your lower-back curve and strains the muscles that support your spine. Supporting the curve and moving regularly usually relieves it.
Does sitting posture really affect back pain?
Yes. Sitting stacked with lumbar support keeps your spine in a neutral position, while slumping loads the discs and muscles, which is a common source of ache.
How often should I get up from my desk?
Aim to stand or move every 30 to 45 minutes. Short, frequent breaks help far more than one long break.
Keep reading
The Complete Ergonomic Desk Setup Guide
Build a workspace that supports your body.
Neck Pain From Working at a Desk
Causes and fixes for desk-related neck pain.
Improve your setup with ArcosGear
Next steps for your desk setup
Lower back comfort starts with support, sitting habits, and a setup that is easier to repeat every day.
- Shop back relief
- Memory foam seat cushion
- Heating waist support belt
- How to sit at a desk
- Posture at a desk guide
General information, not medical advice.
Next step
Build the setup around this guide.
If long sitting is the problem, start with chair fit and seat support, then build movement breaks into the day.
General information, not medical advice.
