skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

0155 Circadian and Homeostatic Influences on Caloric Intake: Forced Desynchrony in Healthy Weight, Overweight, and Obese Adolescents

Sleep (New York, N.Y.), 2019-04, Vol.42 (Supplement_1), p.A63-A64 [Peer Reviewed Journal]

Sleep Research Society 2019. Published by Oxford University Press on behalf of the Sleep Research Society. All rights reserved. For permissions, please e-mail journals.permissions@oup.com. ;ISSN: 0161-8105 ;EISSN: 1550-9109 ;DOI: 10.1093/sleep/zsz067.154

Full text available

Citations Cited by
  • Title:
    0155 Circadian and Homeostatic Influences on Caloric Intake: Forced Desynchrony in Healthy Weight, Overweight, and Obese Adolescents
  • Author: Carskadon, Mary A ; Barker, David ; Hart, Chantelle N ; Raynor, Hollie A ; Gredvig-Ardito, Caroline ; Mason, Ivy C ; Scheer, Frank A J L
  • Subjects: Teenagers
  • Is Part Of: Sleep (New York, N.Y.), 2019-04, Vol.42 (Supplement_1), p.A63-A64
  • Description: Introduction Earlier (circadian) meal timing is associated with more favorable weight outcomes. Whether control of caloric intake across the endogenous circadian cycle and/or time from awakening to bedtime differs depending on body weight is unknown. We addressed these questions in adolescents with a 28-h forced desynchrony (FD), hypothesizing that overweight (OW) and obese (O) adolescents had a higher proportion of daily energy consumed later in the wake episode and at a later circadian phase compared to healthy weight (HW) adolescents. Methods 51 (29m) adolescents (12-15yr) completed 7 FD cycles. Six meals occurred at fixed times each cycle: Meal1 was 1.7h after scheduled awaking, Meal2 was 2h after Meal1, and Meals3-6 followed at 3-h intervals. Foods were selected about 1h before each meal and weighed before and after each meal. Proportion of energy intake for each meal across each wake episode was computed relative to total energy consumed in that cycle. Weight categorization used body mass index (BMI) percentiles (CDC): HW (>5thand <85th; n=24), OW (≥85thand <95th; n=13), or O (≥95th; n=14). Endogenous circadian period was determined using salivary melatonin onsets (Mean: HW=24.19h; OW=24.23h; O=24.22h). Effect of circadian phase and time since scheduled awakening was assessed by Repeated Measures ANOVAs using 6 circadian and 6 time-awake bins. Results There was a significant time awake effect (F(5,2086)=113.5,p<.01) that differed by weight category (F(10,2076)=4.9,p<.01), with more consumption earlier and less later in OW and HW; O group showed more consistent consumption across the wake episode. There was also a significant circadian influence (F(5,2086)=38.08,p<.01) that differed by weight category (F(10,2076)=2.75,p<.01), with O group showing a lower amplitude and later acrophase. We also examined circadian alignment using 1st(aligned) vs. 4th(misaligned) FD cycles. A significant misalignment effect (F(5,550)=14.32,p<.01) was seen and differed by weight category (F(10,528)=2.21,p=.02). Conclusion Consistent with our hypotheses, O showed higher consumption late in the wake episode and at a later circadian phase than other weight groups. Circadian and misalignment influences were weaker for O group compared to OW and HW groups. Support (If Any) DK101046
  • Publisher: Westchester: Oxford University Press
  • Language: English
  • Identifier: ISSN: 0161-8105
    EISSN: 1550-9109
    DOI: 10.1093/sleep/zsz067.154
  • Source: ProQuest One Psychology
    Alma/SFX Local Collection
    ProQuest Central
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait