0116 Association Between Objective Sleep Duration And Intake, Basal Metabolic Rate And Body Composition: A Cross-sectional Study In A Community-based Sample

Abstract

Introduction: The study aimed to examine the association between objective sleep duration and intake, basal metabolic rate (BMR) and body composition (BC) in the community adults. Methods: Total 72 subjects were recruited from the staffs of one industry company through online advertising. The mean age was 33.2 y/o, 70.8% were men, and mean body mass index (BMI) was 22.4 kg/m2. The subjects filled in the standard questionnaire, 3-day food diary, and 7-day sleep log, and wore Actiwatch for 7 days before measurement of BMR and BC and serum biochemistry. The BMR was measured with indirect calorimetry at 8 AM after fasting for 12 hr while BC was measured with bioelectrical impedance analysis. The physical activity was assessed with activity count measured by Actiwatch. The association between sleep duration (short: <5hr, norm: 5-7 hr, long: >7hr), and BMR and BC was tested with the linear regression with adjustment of age, gender, and BMI. Results: The median duration of sleep in all participants was 5.9 hr [interquartile range (5.5-6.7)] where it was 4.6 hr (4-4.9) in short sleeper (n=6), 5.8 hr (5.7-6.2) in norm (n=39), and 7.6 hr (7.5-7.8) in long sleeper (n=8). The median daily caloric intake, percentage of nutrient (fat, protein, and carbohydrate), BMR, respiratory quotient, fat mass, fat free mass and muscle mass, insulin, IGF-1, cortisol, and activity count were similar between 3 groups. The level of high-density lipoprotein (HDL) was higher in the long sleeper than short sleeper (69 mg/dl vs 48 mg/dl, P=0.01). The linear regression showed sleep hour or category of sleep duration was not associated with BMR and BC. Conclusion: The objective sleep duration was associated the level of HDL but not BMR and BC in the community adults.