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Early birds eat better: sleep timing linked to teen diet

NCT ID NCT04992611

Knowledge-focused Sponsor: Children's Hospital Medical Center, Cincinnati Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how the timing of sleep affects what teenagers eat. Researchers wanted to understand why getting more sleep helps some teens eat less, but not others. They studied 190 healthy teens aged 14-18 to see if matching sleep to their natural body clock improves their diet and helps prevent obesity.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

190 people

The number who actually took part.

Started

Jul 2021

Finished

Jul 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

14 to 18 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: Healthy adolescents (any sex, gender, race, or ethnicity) aged 14-18 years, inclusive Exclusion Criteria: 1. Obesity, because findings are meant to inform obesity-prevention efforts 2. Use of a psychiatric medication or other drug with known effects on sleep, weight, or dietary behaviors. 3. Intellectual disability (aka mental retardation) 4. Symptoms of insomnia, obstructive sleep apnea or periodic limb movement disorder, which could mask the effects of the sleep manipulation. 5. Work or other obligations that require bedtime later than 9:30 pm or waking prior to 10 am (earliest bedtime and latest rise time possible during sleep extension) during the final week of the study, or other scheduling obligations that preclude participation. 6. Daily consumption of \>1 coffee or "energy drink" or \>2 caffeinated sodas. 7. Currently diagnosed neurologic illness, history of seizures, or history of head injury resulting in loss of consciousness \>1 min. 8. Refusal to refrain from automobile driving during the sleep restriction period of the study. 9. Symptoms of clinical depression, bipolar disorder, or psychosis.

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Conditions

The condition(s) this trial relates to.

Chronobiology Disorders circadian rhythm sleep disorder Feeding Behavior sleep disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Circadian rhythm disorders Dietary habits Sleep

Contacts and locations

Locations

  • Cincinnati Children's Hospital Medical Center

    Cincinnati, Ohio, 45229, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.