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How exposure to urban green and blue spaces affects sleep and mental well-being

Effects of exposure to urban green and blue spaces on sleep quality and psychological well-being

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN13135658
Enrollment
100
Registered
2026-02-20
Start date
2025-03-11
Completion date
Unknown
Last updated
2026-03-02

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

Conditions

Poor sleep and psychological well-being in urban adult populations Mental and Behavioural Disorders

Interventions

This study employed a repeated measures design comprising four phases: baseline assessment (T0), environmental exposure intervention (T1), short-term assessment (T2), and follow-up assessment (T3). Ov
moderate-dose group: moderate exposure to blue-green spaces
medium-high-dose group: higher exposure to blue-green spaces
high-dose group: very high exposure to blue-green spaces) engaging in direct natural contact at designated locations. Participants were randomly allocated to the four exposure groups using a sequence

Sponsors

Sichuan Agricultural University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 50 Years

Inclusion criteria

Inclusion criteria: 1. Age between 18 and 50 years 2. Reported poor sleep quality, defined as a Pittsburgh Sleep Quality Index (PSQI) score of =8, meeting criteria for clinically significant sleep disorders 3. Be in good physical health and be able to independently complete a walk of approximately 4 kilometres 4. No history of serious mental illness (e.g., schizophrenia or bipolar disorder) 5. No diagnosis of sleep disorder requiring medical intervention 6. Not being on long-term use of sleeping medication, antidepressants, or anxiolytics (e.g., e.g., benzodiazepines, zolpidem, melatonin, ghrelin, antihistamines, tetracyclic antidepressants, and selective 5-hydroxytryptamine reuptake inhibitors) at the time of enrolment to avoid confounding effects of medication on the effectiveness of the intervention

Exclusion criteria

Exclusion criteria: 1. Night shift work or severe circadian rhythm disorders 2. Use of any sedative-type medication or sleep aid/anti-anxiety medication within the current week 3. Presence of a physical disease or disorder that limits the ability to walk outdoors 4. Participation in the full year trial cycle cannot be guaranteed and those expected to miss =2 interventions will be excluded

Countries

China

Contacts

Public ContactCong Ma
MC13547853689@163.com+86 (0)190 1322 6284

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 14, 2026