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Chronotype-specific Sleep in Two Versus Four Consecutive Shifts
Sleep Patterns for Different Body Clocks During Two Versus Four Back-to-Back Work Shifts
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Abstract
Increasing night shifts from two to four resulted in greater sleep debt for early and lower sleep debt for late chronotypes.
- Sleep debt varied based on chronotype, with early types accumulating more sleep loss over four consecutive night shifts.
- Late chronotypes experienced reduced sleep debt after four night shifts, indicating a different response to shift length.
- No significant interaction effects were observed between shift sequence length and chronotype for morning shifts.
- Social jetlag remained unchanged regardless of the number of consecutive night shifts.
- Including naps did not alter the relationship between shift length and sleep debt.
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Key numbers
5.4 h
Increase in Sleep Debt for Early
Average cumulative sleep loss after two night shifts.
3.1 h
Decrease in Sleep Debt for Late
Average cumulative sleep loss after two night shifts.