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Extra Zzz's may boost metabolism in obesity

NCT ID NCT03594994

Knowledge-focused Sponsor: Washington University School of Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 whether sleeping longer can improve how the body processes sugar in people with obesity. About 30 participants who slept less than 7 hours a night were split into two groups: one tried to sleep more, the other kept their usual habits. Researchers measured changes in insulin sensitivity to see if extra sleep made a difference.

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

31 people

The number who actually took part.

Started

Oct 2018

Finished

Jul 2024

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

21 to 65 years

Sex

Female participants only

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: * Sleep \<7h/night * Body mass index 25-50 kg/m2 * Altered glucose metabolism (any of the following) Fasting glucose 100-125 mg/dL or, 2-h plasma glucose 140-199 mg/dL during an oral glucose tolerance test (OGTT) or, HbA1c 5.7-6.4% or, homeostatic model assessment of insulin resistance (HOMA-IR) ≥2.0 Exclusion Criteria: * Sleep disorders 1. moderate to severe sleep apnea (apnea-hypopnea index ≥15 events/hour) 2. had ≥15 periodic limb movements per hour sleep \[PLMS\] 3. narcolepsy or insomnia * Perform shift work * Excessive caffeine or alcohol consumption * Significant organ dysfunction/disease (e.g. diabetes mellitus, kidney disease) * Liver disease other than metabolic dysfunction associated steatotic liver disease (MASLD) * Prior bariatric surgery * Pregnancy or breastfeeding * Taking medications that can affect study outcomes (alter sleep duration or glucose metabolism) * Tobacco or illicit drug use * Perform intense exercise \>70 min/wk or moderate exercise \>150 min/week * Excessive alcohol consumption (\>21 units of alcohol per week for men and \>14 units of alcohol per week for women)

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Conditions

The condition(s) this trial relates to.

Insulin Resistance Obesity obesity disorder

As listed by the trial registrant

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

Insulin resistance Obesity

Contacts and locations

Locations

  • Washington University School of Medicine

    St Louis, Missouri, 63110, United States

More trials for these conditions

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