Fact · Accessibility and health
20hours per week
The second route in UK prescribed disease A12 is repeated palmar flexion and dorsiflexion of the wrist for at least 20 hours a week, for at least 12 months in the 24 months before symptoms begin, with repeated meaning once or more every 30 seconds.
Checked against its source on October 16, 2026
In the source's own words
“repeated palmar flexion and dorsiflexion of the wrist for at least 20 hours per week for a period or periods amounting in aggregate to at least 12 months in the 24 months prior to the onset of symptoms”
The Social Security (Industrial Injuries) (Prescribed Diseases) Regulations 1985, Schedule 1, UK Parliament, legislation.gov.uk (The National Archives), 1985, Schedule 1, prescribed disease A12, paragraph (b).
Open the original- What it measures
- This route covers repetitive, non-powered work with the wrist, such as some assembly or packing tasks, which the vibration route does not reach.
- What it does not show
- The threshold is a legal test for the prescribed disease, not a medical rule for carpal tunnel. Typing alone is not named in the entry.