Sign language interpreting is one of the few jobs where the hands are the entire output, sustained at speed, for as long as the assignment runs. Repetition rates during continuous interpreting are comparable to industrial assembly work, with the added demands of full range of movement, precision and speed all at once.
The occupational risk is well recognised within the profession and poorly recognised outside it.
What the work does
- High-rate repetition with the arms unsupported and elevated, held away from the body
- Full-range wrist and forearm movement at speed, including rapid rotation
- Sustained finger and thumb precision for fingerspelling and handshapes
- Static shoulder load from holding arms up, which drives compensation down the arm
- No natural pauses. The speaker sets the pace, not you, and you cannot slow down to protect a sore wrist
Every other high-repetition job lets you slow down when your hands hurt. This one is set by whoever is talking.
What turns up
- Aching forearms and hands during and after assignments: general overuse
- Thumb-side wrist pain: De Quervain’s, from repeated thumb-loaded handshapes
- Pain up the back of the forearm with a creaking feeling: intersection syndrome, from repeated fast rotation
- Night numbness in thumb, index and middle: carpal tunnel syndrome
- Numbness in ring and little fingers: cubital tunnel
- Outer or inner elbow pain: tennis elbow or golfer’s elbow
- Catching at the base of a finger: trigger finger
The controls that work
- Team interpreting with regular rotation on long assignments. Twenty to thirty minute turns is the professional standard for a reason — it is the only intervention that genuinely reduces continuous load
- Insist on breaks for solo assignments, and build them into the booking rather than asking for them mid-session
- Manage the weekly total, not just the daily one. Cumulative hours across a week predict problems better than any single day
- Warm up before an assignment and move the hands and arms through full range afterwards
- Vary assignment types where you can control your diary. Continuous simultaneous work all week is the highest-load pattern
- Sign in a smaller space when fatigued. Signing large is more load per sign
Report and act early
This is a recognised occupational risk with a real literature behind it, so a report is credible and an early one protects both your hands and your position. The conditions above all have a stage past which outcomes change.
- Numbness that has stopped coming and going
- Pain present before an assignment starts
- A finger catching, locking or not fully straightening
- Reduced clarity or speed in your own signing
- Six weeks of rotation and reduced hours with no change
That fourth one is the professional equivalent of a musician’s fingers slipping: the quality drops before the pain becomes undeniable.
Rotation is not a courtesy. It is the only load control the job has.
Every article on this site is written using the Closing Window Method: name the window your condition runs on, find where you are in it, and act while it’s still open.