Summertime: Kids in Motion

NCT03947918 | Terminated Results

• 1 other identifier: 1K01HL129087-01A1
• Study Type: interventional
• Target: 34
• Locations: 1 country
• Sites: 1

Brief Summary

This is a 3-week randomized crossover study to determine the effect of the prior night's sleep duration on energy-balance related behaviors of diet and physical activity the following day. In Week 1, child participants will sleep their usual amount. In week 2, participants will be randomized to either a sleep restricted or a healthy sleep condition for 4 nights. In week 3, participants will cross over to the opposite sleep condition for 4 nights.

Conditions

Sleep

Outcome Measures

Primary Outcomes (4)

• Differences in Sleep Duration by Sleep Condition.

  Sleep duration will be measured with accelerometers.

  One week

• Differences in Physical Activity (Outcome) by Short and Long Sleep Condition.

  Physical activity will be measured with accelerometers. Accelerometer data will be used to calculate moderate- to vigorous-intensity physical activity (MVPA; minutes). Activity counts were summed for each 24-hour period categorized into moderate to vigorous levels of physical activity according to the previously established thresholds. Moderate physical activity was set at 0.04 \< AEE \< 0.10 kcal.kg-1.min-1 or 3.0 \< PAR \< 6.0, reflective of medium exertion in the standing position. Vigorous physical activity was set at AEE \> 0.10 kcal.kg-1.min-1 or PAR \> 6.0, reflective of activities at a high level of exertion in the standing position. Moderate-intensity and vigorous-intensity physical activity were combined and expressed as minutes spent in MVPA.

  One week

• Differences in Carbohydrate Intake by Long and Short Sleep Condition.

  Sleep duration will be measured with accelerometers. Eating/dietary intake (outcome) will be assessed on Thursdays and Fridays using 24-hour recalls using Nutrition Data System for Research. Sleep duration will be measured with accelerometers. Dietary intake (outcome) will be assessed on Thursdays and Fridays using 24-hour recalls using Nutrition Data System for Research. Daily sugar intake (grams) will be calculated.

  One week

• Differences in Added Sugar Intake by Long and Short Sleep Condition.

  Sleep duration will be measured with accelerometers. Eating/dietary intake (outcome) will be assessed on Thursdays and Fridays using 24-hour recalls using Nutrition Data System for Research. Sleep duration will be measured with accelerometers. Dietary intake (outcome) will be assessed on Thursdays and Fridays using 24-hour recalls using Nutrition Data System for Research. Daily sugar intake (grams) will be calculated.

  One week

Secondary Outcomes (2)

• Maternal Sleep Duration

  Baseline measurement (one time point)

• Sleep Hygiene Related to Children's Sleep Schedules.

  Baseline measurement (one time point)

Study Arms (2)

Short sleep

EXPERIMENTAL

No more than 8 hours of sleep for 4 consecutive nights.

Behavioral: Short sleep; Behavioral: Long sleep

Long sleep

EXPERIMENTAL

At least 10 hours of sleep for 4 consecutive nights

Behavioral: Short sleep; Behavioral: Long sleep

Interventions

Short sleep BEHAVIORAL

Child will be asked to sleep for less than 8 hours. Study team will help parent design a sleep schedule for that week. Study team will send parent daily text messages or phone call reminders.

Also known as: Restricted sleep

Long sleep; Short sleep

Long sleep BEHAVIORAL

Child will be asked to sleep for more than 10 hours. Study team will help parent design a sleep schedule for that week. Study team will send parent text messages or phone call reminders.

Also known as: Healthy sleep

Long sleep; Short sleep

Eligibility Criteria

• Age: 8 Years - 10 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17)

You may qualify if:

• Mexican American child-mother pairs which will include: child 8-10 years old; mother/female guardian; English/Spanish speakers; mobile phone user.

You may not qualify if:

• Children with major illnesses and/or with sleep apnea for which children
• In families where 2 children are eligible for participation, a child will be selected at random to participate in the study.
• The investigators will exclude fathers from this study for reasons due to statistical power

Sponsors & Collaborators

• University of California, San Francisco: lead

Study Sites (1)

University of California San Francisco

San Francisco, California, 94118, United States

Location

Related Publications (5)

• Beebe DW, Simon S, Summer S, Hemmer S, Strotman D, Dolan LM. Dietary intake following experimentally restricted sleep in adolescents. Sleep. 2013 Jun 1;36(6):827-34. doi: 10.5665/sleep.2704.

  PMID: 23729925 BACKGROUND

• Taheri S. The link between short sleep duration and obesity: we should recommend more sleep to prevent obesity. Arch Dis Child. 2006 Nov;91(11):881-4. doi: 10.1136/adc.2005.093013.

  PMID: 17056861 BACKGROUND

• Rendall MS, Weden MM, Fernandes M, Vaynman I. Hispanic and black US children's paths to high adolescent obesity prevalence. Pediatr Obes. 2012 Dec;7(6):423-35. doi: 10.1111/j.2047-6310.2012.00080.x. Epub 2012 Aug 21.

  PMID: 22911935 BACKGROUND

• Singh GK, Kogan MD, Yu SM. Disparities in obesity and overweight prevalence among US immigrant children and adolescents by generational status. J Community Health. 2009 Aug;34(4):271-81. doi: 10.1007/s10900-009-9148-6.

  PMID: 19333745 BACKGROUND

• Martinez SM, Thompson-Lastad A. Latino Parents' Insight on Optimal Sleep for Their Preschool-Age Child: Does Context Matter? Acad Pediatr. 2015 Nov-Dec;15(6):636-43. doi: 10.1016/j.acap.2015.07.003. Epub 2015 Sep 26.

  PMID: 26547544 BACKGROUND

Results Point of Contact

• Title: Suzanna Martinez
• Organization: University of California, San Francisco

suzanna.martinez@ucsf.edu

415-476-2300

Study Officials

• Suzanna M Martinez, PhD

  University of California, San Francisco

  PRINCIPAL INVESTIGATOR

Publication Agreements

• PI is Sponsor Employee: Yes

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Three-week study includes: Week 1 - all children get usual sleep Tuesday-Friday. Week 2 - children are randomized to getting no more than 8 hours or at least 10 hours of sleep (Tuesday-Friday). Week 3 - children crossover to the opposite sleep condition (Tuesday-Friday).

Study Record Dates

• First Submitted: February 19, 2019
• First Posted: May 13, 2019
• Study Start: June 17, 2018
• Primary Completion: March 9, 2020
• Study Completion: March 9, 2020
• Last Updated: April 25, 2025
• Results First Posted: April 25, 2025

Record last verified: 2025-04

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)