Do ergonomic keyboards help with RSI?

They can help with posture, but there is little evidence that they prevent RSI. Split keyboards change the angle of the hands, and in a laboratory study they reduced the bend of the wrist toward the little finger ¹. The trials that tested symptoms are very few, and their results conflict. A keyboard is worth trying if it helps you keep your wrists straight and feels comfortable, but it does not replace the desk height rules or the breaks.

Split keyboards change the wrist angle in the lab

The clearest result comes from a 2001 study of 11 experienced keyboard operators, who typed on a split keyboard set up conventionally and in three split configurations ². All three split configurations reduced ulnar deviation, the bend of the wrist toward the little finger, compared with a conventional setup ¹.

That result measures posture, not symptoms. It also shows that the three split configurations did not differ from each other ³. So the practical question is whether a split layout suits your hands, not which exact angle you pick.

Trials on symptoms are few and disagree

A 2022 Cochrane review found only two trials with 105 participants that compared ergonomic keyboards with placebo keyboards ⁴. The two trials disagreed. In one small trial of 25 people, an ergonomic keyboard reduced pain after 12 weeks. The other trial found no difference in pain at six months ⁵.

The review concluded that there was insufficient evidence from randomised trials to say whether ergonomic equipment is beneficial or harmful for carpal tunnel syndrome ⁶. Note that these trials tested carpal tunnel syndrome, not RSI as a whole. For RSI in general, the trial evidence is thinner still. The 2018 Cochrane review of office ergonomics found that workstation adjustment had no measured effect on upper limb pain or discomfort compared with no intervention ⁷. The guide on typing ergonomics sets out the wider review.

Choose a keyboard by fit, not by a promise

The Canadian Centre for Occupational Health and Safety recommends that users try different keyboard models and see which one suits their needs ⁸. That advice reflects the evidence: the evidence does not show that any design prevents symptoms, so the test is how your hands feel over a working week.

Use this check when you try one:

1. Check your wrist posture on your current keyboard, then on the new one. If the new design does not keep the wrist straighter, it is not helping you.
2. Keep the keyboard at the height set in the question on the correct wrist position. If a new keyboard only works at a different desk height, it is not a fix.
3. Give it at least a week. Judge comfort over real work, not the first hour.
4. Keep taking breaks. The keyboard does not change how long you type without a pause.
5. If numbness, tingling or pain continues, see a clinician. A keyboard is not a treatment.

A keyboard does not change how many keystrokes you make

A keyboard changes how your hands are positioned. It does not change how many keystrokes they make. If the work is mostly typing, the load stays high whatever the design. The question on breaks covers how often to stop, and the guide to dictation for RSI and carpal tunnel covers ways to type less.

The question on the correct wrist position explains the posture target that any keyboard should meet, and the question on wrist rests covers the other common accessory. For the wider condition, see repetitive strain injury.