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

Forest Therapy and Mindfulness for Stress Reduction and Well-being in Highly Sensitive Persons: A Randomized Controlled Pilot Trial

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07183917
Acronym
HSP-FOREST
Enrollment
131
Registered
2025-09-19
Start date
2025-01-13
Completion date
2025-04-30
Last updated
2025-09-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Keywords

Forest Bathing, Shinrin-Yoku, Forest Therapy, Highly Sensitive Person (HSP), Integrative Medicine, Preventive Health, Psychological Well-Being, Nature Therapy, Mindfulness, Stress Reduction, Mental healht, Forest meicine

Brief summary

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

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.

Interventions

BEHAVIORALForest 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.

BEHAVIORALIndoor 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.

Sponsors

IFM International Forest Medicine
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Masking description

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

Intervention model description

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.

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes

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.

Design outcomes

Primary

MeasureTime frameDescription
Change in Perceived Stress (PSS-10)Baseline and 8 weeks (end of intervention)Mean change in Perceived Stress Scale (10-item version, validated questionnaire) scores from baseline to 8 weeks.

Countries

Spain

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026