Effects of Urban Afforestation Activity on Mental Health

Study Overview
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Brief Summary
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This single-group pretest-posttest clinical trial aims to evaluate the effects of a single-session afforestation activity on affect and vitality levels in a sample of young adults.

Detailed Description
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The participants will perform an afforestation activity for a single session of 90 minutes. The therapists will direct the participants' attention to the visual, auditory, olfactory, and tactile features of the surrounding environment.

Official Title
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The Positive Effects of an Urban Afforestation Activity on the Mental Health of Adults

Conditions
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Healthy

Intervention / Treatment
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* Other: Urban Afforestation Program


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults between 18 and 65 years. Any sex and gender. Exclusion Criteria: Intake of any psychotropic medication. Other severe or medically unstable diseases that may interfere with participation. Severe cognitive impairment (Mini-Mental State Examination score < 17 out of 30 points). Severe mental disorders in the acute phase or symptomatic phase. Severe intellectual disability. Behavioural alterations as this may interfere with their participation.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Urban Afforestation Group<br>Participants will perform an afforestation activity with a duration of 90 minutes. | Other: Urban Afforestation Program<br>* An afforestation program based on land cultivation and transplantation of several plants for 90 minutes will be implemented.<br>* Other names: Afforestation activity;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Affect | The Spanish adaptation of the Positive and Negative Affect Schedule will be utilised. Participants rate how they feel at the present moment on a five-point Likert scale, where not at all or very slightly is scored as 1 and a lot as 5. Scores of two 10-item subscales will be analysed separately in the analysis, labelled either as Positive Affect or Negative Affect. Higher scores in the Positive Affect subscale represent higher levels of positive affect and lower scores in the Negative Affect subscale represent lower levels of negative affect. | Change from baseline affect after 90 minutes. | 
| Subjective Vitality | The 6-item Spanish adaptation of the Subjective Vitality Scale will be utilised. Participants will transmit their levels of energy and aliveness at the present moment by rating the items on a seven-point Likert scale where 1 stands for Not true at all and 7 Very true. The scores for each item will be summed up for statistical analyses. Higher scores indicate higher levels of energy and aliveness feeling. | Change from baseline subjective vitality after 90 minutes. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Green spaces, Nature-based activities, Urban afforestation, Horticultural therapy, Adults, Mental health, Affect, Vitality