Caloric and macronutrient intake.
Caloric intake was ad libitum during the study. (a) Despite consuming nearly 1000 kcal during the overnight period of wakefulness, sleep-deprived subjects consumed a similar amount of calories during the day following total sleep deprivation (TSD) as during the day following baseline sleep (BL). Subjects randomized to the control condition consumed a similar amount of calories during corresponding days (BL and CD1). (b) Sleep-deprived subjects consumed a larger percentage of calories from fat and a smaller percentage of calories from carbohydrates during the day following TSD compared to the day following BL sleep. Macronutrient intake did not differ between corresponding days in control subjects (BL and CD1). Data presented as Mean ± SEM; *p<0.05.