Megan N. Parker, Marian Tanofsky-Kraff, Bess F. Bloomer, Jennifer Te-Vazquez, Praise E. Adekola, Ejike E. Nwosu, Julia Lazareva, Jeremiah L. Jones, Alexa Moore, Natasha A. Schvey, Sheila M. Brady, Shanna B. Yang, Sara A. Turner, Jack A. Yanovski, Nichole R. Kelly
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引用次数: 0
Abstract
Objective
Resource-based models of self-regulation posit that cognitive fatigue, or the depletion of cognitive resources, may be an impetus for self-regulatory difficulties, including overeating. Studies of adults indicate that cognitive fatigue may increase energy intake only among adults who report engaging in dietary restraint (DR). The current study examined if DR similarly moderates the effects of cognitive fatigue on energy intake in youth.
Method
Using a randomized crossover design, participants completed a two-hour cognitive fatigue and a non-fatigue control (i.e., watched movies) condition, on separate days within a 31-day period. Energy intake (kcal) was evaluated using a ~10,000 kcal buffet-style meal presented after each condition with the instructions to “Please eat until you are no longer hungry.” DR was assessed via the Eating Disorder Examination.
Results
Participants included 98 youth (13.0 ± 2.56 years; BMI%ile 60.06 ± 29.01; 46.9% Female; 46.9% non-Hispanic White, 20.4% non-Hispanic Black, 12.2% non-Hispanic Asian; 20.4% endorsed engaging in any DR within the prior 28 days). After adjusting for height, fat mass (%), lean mass (kg), sex, race/ethnicity, visit order, and days between visits, the interaction of DR and experimental condition was associated with energy intake, F(1, 88) = 8.60, p = 0.004, η2p = 0.089. Youth with DR had greater intake following the fatigue (vs. control) condition, but intake did not differ by condition among youth without DR.
Discussion
DR may weaken youth's efforts to regulate energy intake when cognitively fatigued. Studies utilizing more comprehensive measures of DR are needed to elucidate whether this association differs across DR phenotypes and in naturalistic environments.
Trial Registration: This study was pre-registered (https://clinicaltrials.gov/ct2/show/NCT02390765)
期刊介绍:
Articles featured in the journal describe state-of-the-art scientific research on theory, methodology, etiology, clinical practice, and policy related to eating disorders, as well as contributions that facilitate scholarly critique and discussion of science and practice in the field. Theoretical and empirical work on obesity or healthy eating falls within the journal’s scope inasmuch as it facilitates the advancement of efforts to describe and understand, prevent, or treat eating disorders. IJED welcomes submissions from all regions of the world and representing all levels of inquiry (including basic science, clinical trials, implementation research, and dissemination studies), and across a full range of scientific methods, disciplines, and approaches.