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Sleep more by tweaking your bedtime: new study tests simple fix for short sleepers

NCT ID NCT07345767

Symptom relief Sponsor: University of Arizona Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether adjusting bedtime by just 15 minutes each week can help adults who sleep 6 hours or less get more sleep. Over 1,000 participants will use a sleep diary or Fitbit to guide their schedule. The goal is to see if this simple approach improves sleep duration, reduces tiredness, and boosts mental health and thinking skills.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Sleep schedule adjustment based on sleep diary or Fitbit data
What this could lead to
If successful, this could provide a simple, non-drug way for short sleepers to improve sleep duration and reduce daytime sleepiness.
What could go wrong
This is a behavioral study with no blinding, so results may be influenced by participant expectations. The intervention is small (15-minute adjustments) and may not work for everyone.

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

About 1,038 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

May 2027

An estimate. End dates often move.

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

18 to 60 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: 1. Be between the ages of 18-60 years old 2. Have a typical sleep schedule of \<=6 hours per night 3. Must have a FitBit device (any model) with Heart Rate Monitor 4. Must have bedtime between 8 pm and 1 am 5. Must have a waketime between 5 am and 10 am 6. Must not have insomnia as determined by diagnosis or score on the Insomnia Severity Index (ISI), or must be treated. 7. Must not have sleep apnea as determined by diagnosis or STOP-BANG scale, or must be treated. 8. Must have a computer or smartphone device for daily sleep diaries. 9. Must have an initial sleep efficiency of at least 85% as determined by sleep diaries and actigraphy. Exclusion Criteria: 1. Any condition that the PI considers would significantly impede participation in the study. 2. Participant is under 18 years of age or older than 60 years of age 3. Does not own a FitBit device with Heart Rate Monitor 4. Sleep \>6 hours per night. 5. Typical bedtime before 8 pm or after 1 am 6. Typical waketime before 5 am or after 10 am 7. Diagnosed with sleep disorders including insomnia or sleep apnea 8. Diagnosed mental health disorder which may impact sleep (i.e. Bipolar Disorder) 9. Taking medications that may affect sleep. 10. Baseline sleep efficiency less than 85%.

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As listed by the trial registrant

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

Short sleep duration

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    1 site. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • University of Arizona

    RECRUITING

    Tucson, Arizona, 85719, United States