“Barista wrist” is emerging as a much more consequential hazard for coffee shop workers than sharp knives, wet floors, or espresso machines bubbling at 200 degrees.

Workers in cafes and coffee shops had more time lost due to workplace injuries than workers in any other restaurant category, restaurant industry claims data analyzed by AmTrust Financial Services Inc. revealed. And repetitive stress wrist injuries are the biggest danger for such workers, with episodes resulting in 265 days of lost time on average, the New York-based insurance company’s report said.

“Our data supports the increasingly accepted belief that the repetitive stress injury...