"Forest Therapy and Mindfulness for Stress Reduction and Well-being in Highly Sensitive Persons (Pilot RCT)"

NCT ID: NCT07183917

Last Updated: 2025-09-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

131 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-01-13

Study Completion Date

2025-04-30

Brief Summary

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This study aims to evaluate the effects of Shinrin-Yoku (Forest Bathing) and Forest Medicine interventions on psychological well-being, stress reduction, and overall health outcomes in adults. Shinrin-Yoku, originated in Japan, is a nature-based practice that involves mindful immersion in forest environments. The intervention combines exposure to natural ecosystems with evidence-based techniques such as mindfulness and guided relaxation.

Participants will be guided through structured sessions in natural forest settings to assess changes in stress biomarkers, emotional regulation, sleep quality, and quality of life. The study is designed as a non-pharmacological, non-invasive intervention, focusing on promoting mental health and preventive medicine.

The findings are expected to provide evidence on the benefits of Forest Medicine as a complementary health approach and contribute to the development of international standards for nature-based therapies.

Detailed Description

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The present study investigates the therapeutic potential of Shinrin-Yoku (Forest Bathing) and Forest Medicine interventions as structured nature-based health practices. Originating in Japan during the 1980s, Shinrin-Yoku has gained recognition worldwide for its reported psychological and physiological benefits. This research seeks to contribute to the scientific evidence supporting these interventions as complementary approaches in preventive and integrative medicine.

Participants will attend guided sessions in natural forest environments. Each session will include periods of mindful walking, sensory awareness exercises, and guided relaxation. No pharmacological or invasive procedures are involved. Outcome measures include validated psychological scales (e.g., stress, anxiety, depression, quality of life), as well as physiological indicators such as heart rate variability and sleep quality.

The study design follows an interventional model focusing on mental health and wellness promotion. Data collection will be conducted before, during, and after the intervention period to assess both immediate and sustained effects.

This project is intended to support the integration of Forest Medicine into broader health strategies, aligning with international research efforts in preventive care, psychosomatic health, and nature-based therapeutic modalities. The study also aims to establish standards for training and best practices in forest-based health interventions across Europe and beyond.

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Two-arm, parallel-group randomized controlled design with 1:1 allocation. Participants are assigned to (a) Forest Therapy + Mindfulness or (b) Indoor Wellness Activities (active control). No crossover is planned. The intervention spans 8 weeks with weekly 2-hour group sessions. Randomization uses a computer-generated sequence with concealed allocation (sealed, opaque envelopes), block sizes of 4-6, and stratification by sex and baseline PSS-10 (median split). Open-label for participants and providers; outcomes assessors/statisticians remain blinded to group codes during analysis.
Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Due to the nature of the intervention (forest therapy and mindfulness), blinding is not feasible. This study uses an open-label design.

Study Groups

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Experimental: Forest Therapy + Mindfulness

Weekly 2-hour guided sessions for 8 weeks in natural forest environments, including mindful walking, sensory awareness, breathing exercises, and guided relaxation.

Group Type EXPERIMENTAL

Forest Therapy and Mindfulness

Intervention Type BEHAVIORAL

Weekly 2-hour guided sessions for 8 consecutive weeks in natural forest environments. Each session includes mindful walking, multisensory awareness (sight, sound, smell, touch), breathing exercises, and guided relaxation practices. Facilitated by certified Forest Therapy and Mindfulness instructors. The intervention is non-invasive, focused on stress reduction, emotional regulation, and improved subjective well-being through mindful immersion in nature.

Active Comparator: Indoor Wellness Activities

Weekly 2-hour indoor sessions for 8 weeks in a classroom or community center setting, including health education talks, guided relaxation or music therapy, and eco-culinary tasting.

Group Type ACTIVE_COMPARATOR

Indoor Wellness Control

Intervention Type BEHAVIORAL

Weekly 2-hour structured sessions for 8 consecutive weeks conducted indoors (classroom or wellness center). Activities include health education talks on stress and wellness, guided music-based relaxation, and eco-friendly culinary tasting experiences. Designed to provide an active comparator condition controlling for attention, group interaction, and wellness-related content without exposure to forest environments or formal mindfulness practices.

Interventions

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Forest Therapy and Mindfulness

Weekly 2-hour guided sessions for 8 consecutive weeks in natural forest environments. Each session includes mindful walking, multisensory awareness (sight, sound, smell, touch), breathing exercises, and guided relaxation practices. Facilitated by certified Forest Therapy and Mindfulness instructors. The intervention is non-invasive, focused on stress reduction, emotional regulation, and improved subjective well-being through mindful immersion in nature.

Intervention Type BEHAVIORAL

Indoor Wellness Control

Weekly 2-hour structured sessions for 8 consecutive weeks conducted indoors (classroom or wellness center). Activities include health education talks on stress and wellness, guided music-based relaxation, and eco-friendly culinary tasting experiences. Designed to provide an active comparator condition controlling for attention, group interaction, and wellness-related content without exposure to forest environments or formal mindfulness practices.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Adults aged 18 to 65 years.
* Self-identified as Highly Sensitive Person (HSP) with a score ≥70 on the Highly Sensitive Person Scale (HSP-SC).
* Able to attend weekly sessions for 8 consecutive weeks.
* Willing to provide written informed consent.

Exclusion Criteria

* Current diagnosis of severe psychiatric disorder (e.g., schizophrenia, bipolar disorder not stabilized).
* Current substance abuse or dependence.
* Severe cardiovascular, respiratory, or mobility limitations preventing safe participation in outdoor walking or relaxation exercises.
* Participation in another clinical intervention study during the same period.
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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IFM International Forest Medicine

OTHER

Sponsor Role lead

Responsible Party

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Ana I. Sánchez Hdz.

"Dr. Ana I. Sánchez Hdz., Sponsor-Investigator, IFM International Forest Medicine, responsible for study design, implementation, and compliance with ethical and clinical research standards."

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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ANA I SÁNCHEZ HDZ, Principal Investigator

Role: STUDY_CHAIR

ASEUSY - European Association Shinrin Yoku and Forest Medicine -Ana I Sánchez Hdz

Locations

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Sessions conducted in natural forest settings within the Serranía de Ronda, specifically the Valle del Genal area.

Ronda, Andalusia, Spain

Site Status

Countries

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Spain

Other Identifiers

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HSP-FOREST-2025-RCT

Identifier Type: -

Identifier Source: org_study_id

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