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Nap study reveals why you feel groggy after a short sleep

NCT ID NCT07409883

Knowledge-focused Sponsor: Mahidol University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how the amount of deep sleep just before waking affects how alert people feel after a 2-hour nap taken at night. Researchers will monitor brain activity during sleep and test reaction times after waking. The goal is to understand sleep inertia and improve nap strategies for night-shift workers.

What this could mean

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

What this could lead to
If successful, this study could help design better nap schedules for night-shift workers to reduce grogginess after waking.
What could go wrong
This is a small, early observational study with only 28 participants, so results may not apply to everyone. It does not test any treatment.

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.

Participants

About 28 people

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

Expected to start

Feb 2026

An estimate. Start dates often move.

Expected to finish

Aug 2026

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.

Who is studied

Healthy volunteers aged between 18 and 60 years, without significant sleep deprivation

Ages

18 to 80 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. Age between 18 and 60 years 2. History of appropriate sleep duration at least 6 hours/night for a minimum of 2 weeks assessed by sleep diary before the trial Exclusion Criteria: 1. STOP-BANG ≥3 or previous diagnosis of obstructive sleep apnea 2. Presence of restless legs syndrome as assessed with IRLSSG criteria 3. Presence of depression as assessed by HADS (Exclude participants with HADS-Depression sub-scale score ≥8 (possible depression) 4. History of irregular work hours or shift work within 2 weeks 5. Use of sedative/hypnotic medications on a regular-basis (3 days/week or above) 6. History of epilepsy and brain tumor

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder, shift work type idiopathic hypersomnia

As listed by the trial registrant

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

Night shift work Sleep inertia Sleep, slow-wave sleep, sleep enhancement, sleep optimization

How to take part

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

  1. The places running it

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

  2. 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 ↗

  3. 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

Locations

  • Faculty of Engineering, Mahidol University

    Nakhon Pathom, 73170, Thailand

More trials for these conditions

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