A good ergonomic chair is one that adjusts to your body and lets you move. Price, brand and the number of levers matter much less. No chair has been shown to prevent back pain on its own, and the evidence for ergonomic furniture is weaker than the evidence for breaking up sitting. This page lists the adjustments that matter and how to set them.
What makes a chair ergonomic
The OSHA workstation guidance lists the features that make a chair fit more people:1
| Feature | Why it matters | What to look for |
|---|---|---|
| Seat height | Feet flat, thighs about horizontal | Wide gas lift range; footrest if you are short |
| Seat depth | Back supported without pressure behind the knees | Sliding seat pan |
| Lumbar support | Fills the curve of the lower back | Height adjustable support |
| Backrest recline | Lets you lean back and change position | Recline of at least 15° with a lock or tension control |
| Armrests | Support the forearms without lifting the shoulders | Height adjustable, or removable |
| Base | Stable and easy to move | Five legs, casters suited to your floor |
If a chair cannot be adjusted to fit you, it is not ergonomic for you, whatever it cost.
Does a better chair reduce back pain?
The evidence is thin. In a meta-analysis of workplace interventions for neck pain in office workers, ergonomic changes gave mixed results overall, with some benefit only in workers who already had pain, while targeted strength exercise had the clearest effect.2 For the lower back, long term studies do not show that sitting time itself causes new back pain; long unbroken sitting matters more for people who already have it.3 See sitting and back pain.
A chair that fits you is worth having for comfort, but no chair is a treatment for back pain. The stronger evidence is for breaking up sitting and for exercise.2
How to set up your chair
- Seat height first: feet flat, knees about level with or slightly below the hips.
- Seat depth: two to three fingers between the seat edge and the back of the knee.
- Lumbar support: at the curve of your lower back, around belt height.
- Recline: unlock it and let yourself lean back a little. Leaning back is a legitimate working position.
- Armrests: just under your relaxed elbows, or lowered out of the way.
Then set the desk and screen around it, see the desk setup checklist.
Kneeling chairs, saddle chairs and exercise balls
These change the position of the pelvis and can feel good for a while, but there is no good evidence that they reduce back pain, and a ball has no backrest to lean back on. They are best used as one option among several. See kneeling chairs and exercise balls.
When not to spend more
If your current chair adjusts for height, has some lower back support and lets you lean back, a new one will change less than standing up every half hour. Spend the money on a standing desk, a laptop stand or a footrest first, then see how often to take sitting breaks.
Comparing a few days on a new chair with a few days on the old one shows whether your sitting posture actually drifts less, rather than just feeling different.
Footnotes
General information, not medical advice. Every claim carries its source; where the evidence is thin, the page says so.Editorial policy · How we grade evidence · All sources · Disclaimer