Intervention description {11a}
sleep deficit
Three conditions that only differ in the amount of hours slept per night will be studied (see Fig. Overview of sleep regime in different study arms (control, sleep deprivation, sleep restriction). Yellow colors indicate time awake, gray colors bed times, vertical lines a period of 24 h. For further explanations, see the text. Abbreviations: SD, sleep deprivation; SR, sleep restrictionIn the control (C) condition, participants will adhere to a 16/8-h wake/sleep regime for 3 consecutive days at home and for the following 2 days in the sleep laboratory under the supervision of study personnel.In the sleep deprivation (SD) condition, participants will follow a 16/8-h wake/sleep regime for 3 consecutive days at home and one night of supervised sleep deprivation (24/0 h) in the sleep laboratory, thus generating a total sleep deficit of 8 h compared to the control condition. The following night (recovery night) offers 8 h of supervised sleep.In the sleep restriction (SR) condition, participants will follow an 18/6-h wake/sleep regime for 3 consecutive days at home and 1 day in a sleep laboratory under the supervision of study personnel, thus also accumulating a total sleep deficit of 8 h compared to the control condition. The following night (recovery night) offers 8 h of supervised sleep.