LONGER SLEEP DURATION PRECEDES GREATER WATER INTAKE AT BREAKFAST

Few studies have examined the relationship between sleep duration and breakfast eating patterns, although studies suggest that each of these variables is associated with weight gain. This analysis evaluated the relationship between sleep duration and next-day breakfast composition in adults who recently experienced involuntarily job loss — a group at high risk for weight gain. At the baseline visit of the ongoing, prospective Assessing Daily Activity Patterns through occupational Transitions (ADAPT) study, 97 fasting participants completed a sleep diary describing the prior night’s sleep at home and then self-selected unrestricted breakfast food of their choice at a hospital cafeteria. Breakfast intake was documented by pre-post meal food photography. Breakfast nutrient intake was assessed by trained dietary assessors using the Nutrition Data System for Research. Associations between prior night total sleep time and food composition were examined in regression models controlling for sex and body mass index. Mean total sleep time was 428 minutes (SD = 106 minutes) with 58% of participants receiving at least 7 hours of sleep. Total sleep time was positively associated with more total grams of food and beverage at breakfast (B = .57, SE = .28, p < .05) characterized by high water weight (B = .57, SE = .25, p < .05). There was no association between total sleep time and energy, total fat, total protein, or total carbohydrate consumption at the breakfast meal. These findings remained consistent with post-hoc control for fast duration. Compared to individuals with shorter sleep duration, individuals with longer sleep duration had heavier next-day breakfasts characterized by more grams of water but no difference in total or macronutrient-specific energy. Because water intake is associated with the intake of fewer daily calories, these findings call for further investigation into the mechanistic underpinnings of factors common to both fluid and sleep homeostasis, such as thermoregulation. Controlled, laboratory-based investigation, into the relationship between sleep and breakfast intake is also warranted. #1R01HL117995-01A1