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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: Int J Obes (Lond). 2013 Dec 19;38(9):1153–1158. doi: 10.1038/ijo.2013.239

Figure 1.

Figure 1

Illustration of the 4-d randomized, crossover research design. In-lab sleep conditions included short sleep duration (4 h/night time in bed, from 0100-0500 h) and habitual sleep duration (8 h/night time in bed, from 2300-0700 h) and. Black bars represent sleep opportunities. Grey bars represent time spent in the small, whole-room indirect calorimeter for measures of energy expenditure in a semi-recumbent position. RMR, resting metabolic rate as measured in the fasting state from 0730-0815 h. TEF, thermic effect of food from 0815-1420 h, as calculated by subtracting RMR from values of postprandial energy expenditure following a high-fat breakfast shake served at 0815 h. B, breakfast; L, lunch; S, snack; D, dinner.