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Can your sleep habits shape your Heart's fate?

NCT ID NCT04804124

Knowledge-focused Sponsor: Oregon Health and Science University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 04, 2026 · Last updated Aug 05, 2026 · Updated 1 time

Summary

This study explores how different sleep durations—short (6 hours or less), long (9 hours or more), and average (7-8 hours)—relate to cardiovascular health, physical activity, and sleep quality. Researchers will measure blood vessel function, blood pressure, and sleep patterns in healthy adults aged 25-65. Some participants may also try a one-week regular 8-hour sleep schedule to see if it has any effect.

What this could mean

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

Active substance
Regularized sleep schedule (behavioral intervention)
What this could lead to
If this study finds clear links between sleep duration and heart health, it could point toward sleep-based strategies to support cardiovascular well-being.
What could go wrong
This is a small, observational study with an optional one-week sleep intervention, so it cannot prove cause and effect. Results may not apply to people with medical conditions or those taking medications.

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 24 people

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

Started

Jun 2021

Expected to finish

Sep 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

25 to 65 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: * Men and women ages 25-65y * Lean and overweight (BMI 18.5-40 kg/m2) * No acute, chronic, or debilitating medical conditions * No prescription/non-prescription medications or drugs of abuse * Current non-smoker (tobacco and marijuana) * Persons who fit all the above criteria and are suitable based on a medical history and health habits questionnaire, and additional sleep and health profiling questionnaires may be eligible to participate. Exclusion Criteria: * Persons with any acute, chronic, or debilitating medical condition except pre-hypertension will be excluded. * Persons with any symptoms of acute or active illness (e.g. fever, leukocytosis) will be excluded. * Persons with a history of severe psychiatric illness or psychiatric disorders will be excluded. * Persons with a history of regular night/or rotating shift work in the past year, or who have traveled more than three time zones during the one month prior to the study will be excluded. * Pregnant women, decisionally impaired adults, and prisoners will be excluded.

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Conditions

The condition(s) this trial relates to.

sleep disorder

As listed by the trial registrant

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

Cardiovascular risk factor Sleep

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

  • Oregon Health and Science University

    RECRUITING

    Portland, Oregon, 97239, United States

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