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Nature vs. city: can a quick green break calm your stressed brain?

NCT ID NCT07508800

Knowledge-focused Sponsor: National Institutes of Health (NIH) 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 24, 2026 · Updated 2 times

Summary

This study looks at how spending a short time in nature, compared to being in a city, affects brain activity, heart rate, and stress in people who feel very stressed, depressed, or anxious. Researchers will measure brain waves and heart rate while participants rest or do tasks. The goal is to understand the mental health benefits of nature exposure.

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

4 people

The number who actually took part.

Started

Jan 2026

Finished

Jun 2026

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Individuals endorsing high stress levels will be recruited from the community and UCSF clinician outreach through flyer, media advertisements. Current or past depressive and anxiety disorders, if present, will be included due to their high prevalence and overlap with perceived stress.

Ages

18 to 25 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Meets cut-off for high level of perceived stress on PSS-10 during screening (\>27 total score); Current or past depressive and anxiety disorders, if present on SCID-5 assessment, will be ncluded due to their high prevalence and overlap with perceived stress * Normal, or corrected to normal, vision (due to the visual nature of the EEG tasks) * If on psychotropic medication, stable regime for \> 1 month Exclusion Criteria: * Major medical conditions with CNS sequelae (e.g., seizure disorders, multiple sclerosis, significant, uncontrolled cardiovascular pathology) Past or present neurological problems (including seizures and head trauma resulting in neurological or cognitive sequelae) * IQ estimate \<75 on the Test of Premorbid Functioning * Current or past history of severe mental illness (e.g., bipolar schizophrenia spectrum disorder, or current or past history of substance use disorders

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As listed by the trial registrant

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

Stress (psychology)

Contacts and locations

Locations

  • University of San Francisco California OR San Francisco VA Medical Center

    San Francisco, California, 94122, United States

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