Evidence map›Paper›PMID 35461788›Full record

Trial reportSleep health2022

Earlier bedtimes and more sleep displace sedentary behavior but not moderate-to-vigorous physical activity in adolescents.

Kendra N Krietsch, Kara M Duraccio, Nanhua Zhang, Brian E Saelens, Taylor Howarth, Angela Combs, Dean W Beebe

Open access · greenAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Sleep health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.8field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 11 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Sleep habits in the pathogenesis and management of diabesity.Journal of diabetes investigation · 2025
    Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 1 country.

Kendra N KrietschDivision of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Psychology, St. Louis Children's Hospital, St. Louis, Missouri, USA; Department of Clinical Pediatrics, Washington University, St. Louis, Missouri, USA. Electronic address: kendra.krietsch@bjc.org.
Kara M DuraccioDivision of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Psychology, Brigham Young University, Provo, Utah, USA.
Nanhua ZhangDivision of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
Brian E SaelensSeattle Children's Research Institute and Departments of Pediatrics and Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA.
Taylor HowarthDivision of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
Angela CombsDepartment of Psychology, University of Cincinnati College of Arts and Sciences, Cincinnati, Ohio, USA.
Dean W BeebeDivision of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.
Cincinnati Children's Hospital Medical Center · USBrigham Young University · USSeattle Children's Hospital · USUniversity of Cincinnati Medical Center · US

Funding

Research Training in Child Behavior and NutritionT32DK063929 · NIDDK · CINCINNATI CHILDRENS HOSP MED CTR · PI SCOTT W POWERS, MARGARET H ZELLER · 2003 to 2026
$6.0M
Sleep Restriction and the Adolescent Diet: Impact and MechanismsR01HL120879 · NHLBI · CINCINNATI CHILDRENS HOSP MED CTR · PI BEEBE, DEAN W. · 2014 to 2017
$1.8M
NHLBI NIH HHS R01 HL120879NIDDK NIH HHS T32 DK063929
6 · The paper itself

Abstract

objectivesCorrelational models suggest increased cardiometabolic risk when sleep replaces moderate-to-vigorous (but not sedentary or light) physical activity. This study tested which activity ranges are impacted by experimentally altering adolescents' bedtime.

methodAdolescents completed a 3-week within-subjects crossover experiment with 5 nights of late bedtimes and 5 nights early bedtimes (6.5- and 9.5-hours sleep opportunity, respectively). Experimental condition order was randomized. Waketimes were held constant throughout to mimic school start times. Sleep and physical activity occurred in the natural environments, with lab appointments following each 5-day condition. Waist-worn accelerometers measured physical activity and sedentary behavior. Wrist-worn actigraphs confirmed sleep condition adherence. Wilcoxon tests and linear mixed effects models compared waking activity levels between conditions and across time.

resultsNinety healthy adolescents (14-17 years) completed the study. When in the early (vs. late) bedtime condition, adolescents fell asleep 1.96 hours earlier (SD = 1.08, d = 1.82, p < .0001) and slept 1.49 hours more (SD = 1.01, d = 1.74, p < .0001). They spent 1.68 and 0.32 fewer hours in sedentary behavior (SD = 1.67, d = 1.0, p < .0001) and light physical activity (SD = 0.87, d = 0.37, p = .0005), respectively. This pattern was reflected in increased proportion of waking hours spent in sedentary and light activity. Absolute and proportion of moderate-to-vigorous physical activity did not differ between conditions (d = 0.02, p = .89; d = 0.14, p = .05, respectively).

conclusionsInducing earlier bedtimes (allowing for healthy sleep opportunity) did not affect moderate-to-vigorous physical activity. Alternatively, later bedtimes (allowing for ≤ 6.5 hours of sleep opportunity, mimicking common adolescent school night sleep) increased sedentary behavior. Results are reassuring for the benefits of earlier bedtimes.

Indexed as

Sedentary BehaviorSleepAdolescentExerciseHumansSchoolsTime FactorsHealth promotionModerate to vigorous physical activityObesityPediatricSedentary activitySleep duration

Identifiers

PMID35461788
PMCPMC12459484
OpenAlexW4224284787

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.