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Updated: Apr 12, 2026

Measuring Biophysical and Psychological Stress Levels Following Visitation to Three Locations with Differing Levels of Nature
Published on: June 19, 2019
[Psychological Effects of Forest Therapy Program on Workers]
Harumi Ikei1, Haruka Koizumi, Chorong Song
1Center for Environment, Health and Field Sciences, Chiba University, 2) Current address: Forestry and Forest Products Research Institute.
Forest therapy significantly improves workers' psychological well-being. This nature-based intervention reduces subjective symptoms and enhances mood for several days post-program.
Area of Science:
- Environmental Psychology
- Occupational Health
Context:
- Workplace mental health is a growing concern.
- Nature-based interventions are increasingly explored for employee well-being.
Purpose:
- To investigate the psychological impact of a forest therapy program on workers.
- To quantify changes in mood and subjective symptoms following nature immersion.
Summary:
- Workers participating in forest therapy showed reduced subjective symptoms for five days.
- Mood states, measured by the Profile of Mood States (POMS), improved for three days.
- Semantic Differential (SD) method indicated enhanced feelings of comfort, relaxation, and naturalness during the program.
Impact:
- Provides scientific evidence for the efficacy of forest therapy in improving worker mental health.
- Suggests forest therapy as a viable strategy for stress reduction and well-being enhancement in occupational settings.
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