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Can a walk in the park or a nature video boost your immune system?

NCT ID NCT05492006

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 06, 2026 · Last updated Aug 25, 2026 · Updated 3 times

Summary

This study investigates whether intentional contact with nature (like a guided walk in a park) or indirect contact (watching nature videos) can improve immune markers and mood in adults aged 50 and older. Participants are randomly assigned to one of two nature experiences or a control group. Researchers measure changes in blood immune markers and emotional states over several weeks.

What this could mean

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

Active substance
nature contact (forest bathing and nature videos)
What this could lead to
If it works, this could point toward simple, accessible ways to boost immune function and mood in older adults.
What could go wrong
This is a small, early-stage study with only 54 participants. Results may not apply to everyone, and any immune changes might be temporary or not clinically meaningful.

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

54 people

The number who actually took part.

Started

Jun 2023

Finished

Jun 2025

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 years and older

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: * individuals of both sexes * capable of physical and mental to carry out the proposed activities * capable of mental to fill in the questionnaires. Exclusion Criteria: * autoimmune diseases * chronic or acute inflammatory diseases * disease that affects the response of the immune system * neuromuscular problems * oncological diseases and neoplastic * individuals being treated with immunosuppressive drugs or that affect the immune system * individuals who are under the influence of alcohol or other substances that interfere with cognitive ability * those who have had contact intentional relationship with nature in the 30-day period prior to participating in the study

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As listed by the trial registrant

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

Contacts and locations

Locations

  • Hospital Israelita Albert Einstein

    São Paulo, São Paulo, 05652000, Brazil

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