A split shift, for example, is when an employee first works in the morning and then in the afternoon with several hours of unpaid time in between.
In Sweden, roughly 150,000 employees work split shifts. A fourth of them see it as a shift that entails problems, according to a study from the Stress Research Institute.
Daniel, who prefers not to give his last name, is a nurse who works at a home for people with dementia in Västerås in central Sweden. He works every other weekend with split shifts.
"When I work weekends," he says, "I leave home when the kids are sleeping and come home at night when the kids are sleeping. So, I can't be together with the kids. Yeah, for me, that's the worst."