Fig. 1From: Metabolomics-based Sleepiness Markers for Risk Prevention and Traffic Safety (ME-SMART): a monocentric, controlled, randomized, crossover trialOverview 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 restrictionBack to article page