An interventional study of Forest therapy in Fybromyalgia and Fibromyalgia (FM), sponsored by Azienda USL Toscana Nord Ovest. Not yet recruiting at 1 site in Italy. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-15.
Sponsored by Azienda USL Toscana Nord Ovest · Not applicable, Interventional, and Treatment
The goal of this clinical trial is to evaluate if Forest therapy can reduce pain levels and improve the quality of life related to the level of pain perceived in fibromyalgia patients.
The main question it aims to answer is:
Does frequenting certified forest environments, according to the principles and methods of Forest Therapy, produce positive effects on chronic pain and the consumption of painkillers? The study is part of the "Forest Therapy Project as a Broad-Spectrum Tool for Patients Affected by Fibromyalgia" funded by the Tuscany Region as part of the Complementary Medicine program for the three-year period 2025-2027. The project will be carried out thanks to the collaboration with the National Research Council - Institute for BioEconomy (CNR-IBE)
Participants will be divided into two groups. One group, called the "intervention group," will participate in experimental Forest Therapy sessions at an easily accessible forest site. Another group, called the "control group," will not be required to make any changes to their usual habits or activities.
The Forest Therapy sessions consist of short, slow walks, intentionally without significant physical exertion, along safe and easy paths. Led by clinical professionals such as doctors, psychologists, or psychotherapists from the Anesthesia and Intensive Care Unit of Cecina, the sessions include frequent breaks and encourage concentration on the sensory connection with the forest environment.
The study is randomized, so assignment to one of the two treatment groups above will follow a pre-defined random criterion.
During the study, all patients will follow standard therapeutic treatments specific to their condition.
1,336 studies on the registry are indexed under Fibromyalgia; 265 are open to participants now.
This study's planned enrollment of 70 is above the median of 60 across 1,034 interventional studies indexed under Fibromyalgia.
Browse Fibromyalgia studies →Azienda USL Toscana Nord Ovest is the lead sponsor of 12 studies on the registry; 3 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
The intervention will consist of Forest Therapy sessions, once a week for 12 consecutive weeks . The Forest Therapy sessions will be held in the Tombolo di Cecina Biogenetic Nature Reserve during the first year and in the second year in the "Giardino Belora, Fiume Cecina" Protected Natural Area, Municipality of Riparbella (PI). Forest Therapy will consist of short, slow walks, intentionally without significant physical effort, along safe and easy trails, classified at the lower "Tourist" level on the Italian Alpine Club's trail difficulty scale, immersed in particularly valuable forest environments.
Behavioral: Forest therapy
The control groups will consist of a cohort of fibromyalgia patients randomized-like the intervention groups-according to the following stratification factors: age (\<50 vs. ≥50 years); baseline VAS score (\<60 vs. ≥60 mm), to ensure maximum homogeneity with the intervention groups. The same measures as those required for intervention group participants will be performed on them. Compared to the intervention group, participants will not be required to modify their normal habits and activities.
Each session of Forest therapy will be organized as follows: 1. Gathering at the meeting point with the participants, doctor, psychologist, and staff. 2\. Introduction of the psychologist and the planned activities - 5 minutes. 3. Administration of the STAI and POMS tests and preliminary physiological measurements - 30 minutes. 4\. Beginning of the activity: request to turn off the phone and minimize verbal exchanges. Slow walking - 5 minutes. Visual perception - 15 minutes. Slow walking - 5 minutes. Auditory perception - 15 minutes. Slow walking - 5 minutes. Tactile perception - 15 minutes. Slow walking - 5 minutes. Olfactory perception - 15 minutes. Slow walking - 5 minutes. Perceptual and movement activity chosen by the participant - 20 minutes. 5. Walk back to the starting/ending point - 20 minutes. STAI-S and POMS test and final physiological measurements - 30 minutes
Level of perceived pain assessed using the Visual Analog Scale
Level of perceived pain assessed using the Visual Analog Scale (VAS), a validated gold standard for fibromyalgia and allowing for direct and comparable measurement. The Visual Analogue Scale is the most widely used method in medicine to measure the intensity of pain subjectively perceived by the patient. It is usually represented as a continuous line 10 centimetres long, the ends of which indicate two opposite conditions: left end (0): no pain ; right end (10): the worst pain imaginable. The patient fills in the instrument by making a mark on the line at the point corresponding to the pain he or she feels. The operator then measures the distance in millimetres (from 0 to 100) to obtain the score. Interpretation of the Scores (cut-off): based on various clinical studies, the values of the scale are generally divided into 4 ranges: 0 - 4 mm: no pain ; 5 - 44 mm: mild pain ; 45 - 74 mm: Moderate pain; 75 - 100 mm: Severe pain.
Time frame: Up to the last follow-up 3 months after the end of the therapy
Impact of fibromyalgia on quality of life evaluated by the Revised Fibromyalgia Impact Questionnaire (FIQR)
The Revised Fibromyalgia Impact Questionnaire (FIQR) is a self-assessment questionnaire used to measure the impact of fibromyalgia on quality of life. The FIQR has 21 individual questions. All questions are based on an 11-point numeric rating scale of 0 to 10, with 10 being 'worst'. All questions are framed in the context of the past 7 days. The FIQR is divided into 3 linked sets of domains (symptoms, function and overall impact of the disease) and the final score (0-100) is obtained by summing the values of the 3 domains. Four severity categories and their corresponding cutoffs have been identified: remission if final score ≤30, mild if final score \>30 and ≤45, moderate if final score \>46 and ≤65, severe if final score \>65. The study will evaluate the change in the score of the FIQR in the 2 arms.
Time frame: Up to the last follow-up 3 months after the end of the therapy
Extent of body pain evaluated by the "Widespread Pain Index" (WPI)
The Widespread Pain Index (WPI) is one of two key parameters used for the assessment and diagnosis of fibromyalgia. It measures the extent of body pain . The questionnaire asks the patient to indicate in which specific areas of the body they have felt pain during the last week. The list consists of 19 body areas. One point is assigned for each area where pain is present. The total score therefore ranges from 0 (no area) to 19 (all the body).
Time frame: Up to the last the follow-up 3 months after the end of the therapy
Assessment of anxiety status using the State-Trait Anxiety Inventory scale (STAI questionnaires)
The State-Trait Anxiety Inventory (STAI) is a standardized psychometric scale for measuring anxiety. It is divided into two parts: 20 questions to assess trait anxiety (STAI-T) and 20 questions to assess state anxiety (STAI-S). The STAI is a 60-point scale (from 20 to 80) where 20 indicates the lowest level of anxiety and 80 the highest possible score.
Time frame: From the beginning of the forest therapy session to the end of the session
Assess mood and emotional states using the Profile of Mood States" (POMS) questionnaire
The Profile of Mood States" (POMS) questionnaire is a psychological and psychiatric questionnaire used to assess mood and emotional states. It is used in the management of fibromyalgia to quantify the psychological impact (e.g., anxiety, depression, fatigue) and stress related to chronic pain. The test consists of a list of adjectives (typically 65 in the standard version) that describe feelings and emotions experienced "including today." The patient rates each adjective on a scale from 0 (not at all) to 4 (extremely). The questionnaire measures 6 mood dimensions: Tension-Anxiety (e.g., tense, anxious, nervous); Depression-Disappointment (e.g., unhappy, sad, hopeless); Truth-Hostility (e.g., angry, resentful, offended); Vigor-Activity (e.g., active, energetic, lively); Fatigue-Inertia (e.g., tired, exhausted, listless); Confusion-Disconcertment (e.g., confused, disoriented, forgetful).
Time frame: From the beginning of the forest therapy session to the end of the session
Systolic and diastolic blood pressure in mmHg
Changes in systolic and diastolic blood pressure in mmHg
Time frame: Up to the last follow-up 3 months after the end of the therapy
Heart Rate in ms
Heart Rate in ms
Time frame: Up to the last follow-up 3 months after the end of the therapy
Heart Rate Variability Variation in ms
Heart Rate Variability Variation in ms
Time frame: Up to the last follow-up at 3 months after the end of the therapy
Possible change in pain medication use at the end of the study (intervention groups vs. control groups).
Possible change in pain medication use at the end of the study (intervention groups vs. control groups).
Time frame: Up to the last follow-up at 3 months after the end of the therapy
Dependence of the variation of the aforementioned scores and parameters on environmental variables
Dependence of the variation of the aforementioned scores and parameters on environmental variables (meteorological comfort, volatile organic pollutants and biogenic volatile organic compounds), assessed during the forestry therapy sessions for the intervention groups only
Time frame: From the beginning of the forest therapy session to the end of the session
Measure the overall severity of symptoms using the Symptom Severity Scale questionnaire
The Symptom Severity Scale (SSS) is one of the two main measures used to evaluate and diagnose fibromyalgia. It measures the overall severity of symptoms. It is commonly calculated in conjunction with the WPI scale. The SSS scale assigns a score from 0 to 12, adding the two values: severity of the 3 main syntoms e general somatic syntoms: 1\) Severity of the 3 main symptoms (score from 0 to 3 for each): the level of disturbance perceived in the last week is assessed: 1. Asthenia (chronic tiredness). 2. Sleep seizures or non-restorative sleep. 3. Cognitive symptoms (difficulty with memory or concentration, mental fog) (Assigned values: 0 = No problem; 1 = Mild/Moderate; 2 = Moderate/Considerable; 3 = Severe/Continuous) 2) General somatic symptoms (score from 0 to 3): the presence of other related disorders is assessed (e.g. headache/migraine, abdominal pain or cramps, depression). (Assigned values: 0 = No symptoms; 1 = Few symptoms; 2 = Moderate symptoms; 3 = Severe symptoms)
Time frame: Up to the last follow-up 3 months after the end of the therapy
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Azienda USL Toscana Nord Ovest