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Skipping sleep may weaken your Heart's workout response

NCT ID NCT06679543

Knowledge-focused Sponsor: University of Guelph 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how getting too little sleep changes the way your heart pumps blood during exercise. Researchers will ask 30 healthy young adults to cycle after a normal night's sleep and again after a night where they wake up early. They want to see if a drop in blood volume explains the lower heart output and blood pressure seen after sleep loss, and whether men and women respond differently.

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 30 people

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

Started

Jan 2025

Expected to finish

Dec 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.

Ages

18 to 50 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: * Free of known cardiovascular or metabolic diseases or sleep disorders * No history of smoking (within the past 3 months) * Able to engage in physical activity assessed through the physical activity readiness questionnaire (PAR-Q+) * No prescription of chronic medications other than oral contraceptives * Able to abide by sleep protocols for all visits * Individuals who are not allergic to ultrasound gel * Individuals who are not pregnant Exclusion Criteria: * Individuals diagnosed with cardiovascular or metabolic disease or sleep disorders * Has a history of smoking (within the past 3 months) * Not ready to engage in physical activity as assessed by the PAR-Q+ * Individuals prescribed chronic medications other than oral contraceptives * Unable to abide by sleep protocols for any testing visit * Allergic to ultrasound gel * Pregnancy

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Conditions

The condition(s) this trial relates to.

Sleep Deprivation

As listed by the trial registrant

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

Sleep deprivation

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

  • University of Guelph

    RECRUITING

    Guelph, Ontario, N1G 2W1, Canada

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