Observational studyThe international journal of behavioral nutrition and physical activity2021
Later sleep timing predicts accelerated summer weight gain among elementary school children: a prospective observational study.
Observational study in The international journal of behavioral nutrition and physical activity, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Intradialytic plantar electrical nerve stimulation to improve mobility and plantar sensation among adults with diabetes undergoing hemodialysis: a randomized double-blind trial.Journal of nephrology · 2023Trial
- School's Out, Rules Out: Changes in parent rules and routines over summer from the What's UP (Undermining Prevention) with Summer Observational Cohort Study.Research square · 2026Article
- Performance of an automated sleep scoring approach for actigraphy data in children and adolescents.Sleep · 2026Article
- Levelling-up summer: using summer holiday programs to support child health and wellbeing - a Delphi study.BMC public health · 2025Article
- Methodological Choices on 24-h Movement Behavior Assessment by Accelerometry: A Scoping Review.Sports medicine - open · 2025Review
- Association between the urine tobacco metabolite levels and physical health in Chinese primary school students with secondhand smoke exposure.Frontiers in public health · 2025Article
- Children's Health, Wellbeing and Academic Outcomes over the Summer Holidays: A Scoping Review.Children (Basel, Switzerland) · 2024Article
- Delayed Mid-Sleep Time Associated With Weight Gain While Controlling for Eating Behaviors and Attention Deficit Hyperactivity Disorder Symptoms During the COVID-19 Pandemic.Psychiatry investigation · 2023Article
- Article
- Machine Learning-Based Aggression Detection in Children with ADHD Using Sensor-Based Physical Activity Monitoring.Sensors (Basel, Switzerland) · 2023Article
- Seasonal variability in body mass index change among children enrolled in the Pediatric Obesity Weight Evaluation Registry: A step in the right direction.Pediatric obesity · 2023Article
- Validation of the Entrainment Signal Regularity Index and associations with children's changes in BMI.Obesity (Silver Spring, Md.) · 2023Observational
- Sleep quality and sleep routines as mediators of stressors and life satisfaction in Czech university students: a structural equation model.Frontiers in psychology · 2023Article
- Evaluation of a Circadian Rhythm and Sleep-Focused Mobile Health Intervention for the Prevention of Accelerated Summer Weight Gain Among Elementary School-Age Children: Protocol for a Randomized Controlled Feasibility Study.JMIR research protocols · 2022Article
- To Wear or Not Wear the Mask: Decline in Positive Airway Pressure Usage in Children with Sleep Disordered Breathing During the COVID-19 Pandemic.Nature and science of sleep · 2022Article
- Seasonality of Children's Height and Weight and Their Contribution to Accelerated Summer Weight Gain.Frontiers in physiology · 2022Article
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Authors and funding
13 authors.
Funding
Abstract
OBJECTIVES AND
backgroundSocial demands of the school-year and summer environment may affect children's sleep patterns and circadian rhythms during these periods. The current study examined differences in children's sleep and circadian-related behaviors during the school-year and summer and explored the association between sleep and circadian parameters and change in body mass index (BMI) during these time periods.
methodsThis was a prospective observational study with 119 children ages 5 to 8 years with three sequential BMI assessments: early school-year (fall), late school-year (spring), and beginning of the following school-year in Houston, Texas, USA. Sleep midpoint, sleep duration, variability of sleep midpoint, physical activity, and light exposure were estimated using wrist-worn accelerometry during the school-year (fall) and summer. To examine the effect of sleep parameters, physical activity level, and light exposure on change in BMI, growth curve modeling was conducted controlling for age, race, sex, and chronotype.
resultsChildren's sleep midpoint shifted later by an average of 1.5 h during summer compared to the school-year. After controlling for covariates, later sleep midpoints predicted larger increases in BMI during summer, (γ = .0004, p = .03), but not during the school-year. Sleep duration, sleep midpoint variability, physical activity levels, and sedentary behavior were not associated with change in BMI during the school-year or summer. Females tended to increase their BMI at a faster rate during summer compared to males, γ = .06, p = .049. Greater amounts of outdoor light exposure (γ = -.01, p = .02) predicted smaller increases in school-year BMI.
conclusionsObesity prevention interventions may need to target different behaviors depending on whether children are in or out of school. Promotion of outdoor time during the school-year and earlier sleep times during the summer may be effective obesity prevention strategies during these respective times.
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