TY - JOUR
T1 - Sleep duration modifies effects of free ad libitum school meals on adiposity and blood pressure
AU - Hjorth, Mads Fiil
AU - Sjödin, Anders Mikael
AU - Dalskov, Stine-Mathilde
AU - Damsgaard, Camilla Trab
AU - Michaelsen, Kim F.
AU - Biltoft-Jensen, Anja
AU - Andersen, Rikke
AU - Ritz, Christian
AU - Chaput, Jean-Philippe
AU - Astrup, Arne
N1 - CURIS 2016 NEXS 004
PY - 2015/10/7
Y1 - 2015/10/7
N2 - Insufficient sleep can potentially affect both energy intake and energy expenditure, resulting in obesity and reduced cardiometabolic health. The objective of the study was to investigate if habitual sleep duration of 8- to 11-year-olds modifies the effect of free ad libitum school meals on cardiometabolic markers, body composition, dietary intake, and physical activity. For 2 consecutive 3-month periods, this cluster-randomized, controlled, cross-over trial provided 530 children with school meals or usual lunch brought from home. Dietary intake, activity, and sleep were measured simultaneously for 7 consecutive days using dietary records and accelerometers. Short- and long-sleeping children were defined as lower and upper tertile of sleep duration. Body composition, blood pressure, blood lipids, and homeostatic model assessment of insulin resistance (HOMAIR) were measured/calculated. Overall, school meals compared with lunch from home had positive effects on physical activity and blood pressure in long-sleeping children and negative effects on body fat in short-sleeping children. Short-sleeping children increased fat mass compared with long-sleeping children by 0.21 (95% confidence interval 0.03–0.38) kg, android fat mass by 0.02 (0.001–0.04) kg, waist circumference by 0.73 (0.23–1.24) cm, blood pressure by 1.5 (0.4–2.6) mm Hg, fat intake by 1.1 (0.2–2.0) percentage of energy, and decreased total physical activity by 7.2 (1.6–12.7) % (all P ≤ 0.04), while HOMAIR and blood lipids were not modified by sleep duration (all P ≥ 0.32). In conclusion, the susceptibility to increase abdominal adiposity and blood pressure when exposed to dietary changes can potentially be explained by too little sleep, which results in increased caloric intake and reduced physical activity.
AB - Insufficient sleep can potentially affect both energy intake and energy expenditure, resulting in obesity and reduced cardiometabolic health. The objective of the study was to investigate if habitual sleep duration of 8- to 11-year-olds modifies the effect of free ad libitum school meals on cardiometabolic markers, body composition, dietary intake, and physical activity. For 2 consecutive 3-month periods, this cluster-randomized, controlled, cross-over trial provided 530 children with school meals or usual lunch brought from home. Dietary intake, activity, and sleep were measured simultaneously for 7 consecutive days using dietary records and accelerometers. Short- and long-sleeping children were defined as lower and upper tertile of sleep duration. Body composition, blood pressure, blood lipids, and homeostatic model assessment of insulin resistance (HOMAIR) were measured/calculated. Overall, school meals compared with lunch from home had positive effects on physical activity and blood pressure in long-sleeping children and negative effects on body fat in short-sleeping children. Short-sleeping children increased fat mass compared with long-sleeping children by 0.21 (95% confidence interval 0.03–0.38) kg, android fat mass by 0.02 (0.001–0.04) kg, waist circumference by 0.73 (0.23–1.24) cm, blood pressure by 1.5 (0.4–2.6) mm Hg, fat intake by 1.1 (0.2–2.0) percentage of energy, and decreased total physical activity by 7.2 (1.6–12.7) % (all P ≤ 0.04), while HOMAIR and blood lipids were not modified by sleep duration (all P ≥ 0.32). In conclusion, the susceptibility to increase abdominal adiposity and blood pressure when exposed to dietary changes can potentially be explained by too little sleep, which results in increased caloric intake and reduced physical activity.
U2 - 10.1139/apnm-2015-0319
DO - 10.1139/apnm-2015-0319
M3 - Journal article
C2 - 26647154
SN - 1715-5312
VL - 41
SP - 33
EP - 40
JO - Applied Physiology, Nutrition and Metabolism
JF - Applied Physiology, Nutrition and Metabolism
IS - 1
ER -
