Why Contact with Nature Supports Wellbeing
Spending time in natural environments is associated with lower stress and better mood versus built settings.
Adjust for extreme heat, air-quality alerts, allergy season, or limited mobility.
- Persistent low mood or anxiety despite lifestyle steps: see a licensed mental-health professional
What the evidence says
The sources are meta-analyses, a systematic review and randomised trials of nature contact. Yao 2021 (meta-analysis of 20 studies) reports that exposure to natural environments increased positive affect (SMD = 0.61) and decreased negative affect (SMD = -0.47) against built environments. Barton 2010 (meta-analysis) reports that green exercise improved self-esteem and mood, and concludes that the environment provides an important health service. Siah 2023 (meta-analysis) suggested that forest bathing can significantly reduce symptoms of depression and anxiety. Zhu 2024 (meta-analysis) reports that natural-sound exposure reduced anxiety, heart rate and blood pressure, with cognitive restoration inconclusive, and Fan 2024 (meta-analysis) found natural sounds more beneficial for stress reduction than quiet environments, though evidence was slightly inconsistent. Roe 2020 (randomised trial) reports higher happiness after walks in urban green districts and suggests that urban green space offers promising opportunities for supporting older people's mental health. Choe 2020 (randomised trial) reports greater mental-health and wellbeing outcomes for mindfulness-based stress reduction outdoors than indoors. Harries 2025 (randomised trial) suggests that the well-being effects of time in nature are enhanced by actively noticing nature. Brown 2014 (randomised trial) reports that the exercise environment did not seem to influence activity levels or health outcomes. Browning 2020 (systematic review of 175 experiments) reports that experiments without control groups or randomised treatments reported more positive findings than expected, and concludes that this may indicate publication bias favouring over-reporting of benefits.
- You need wilderness or long trips, Barton 2010 reports large benefits from short durations and Roe 2020 studied urban green districts
- Benefits are only in the mind, Zhu 2024 also reports lower heart rate and blood pressure with natural sound
- Nature exposure cures depression, anxiety or any disease
- Time in nature replaces prescribed treatment
- Agreement
- Direction recorded for 0 of 12 sources; not yet recorded for the rest.
- The claim's outcome
- Outcome not yet recorded
- Certainty
- No source states a certainty rating.
- How the sources were read
- Some sources are based on abstracts, not full texts.
What each source measured and concluded (12)
- What it measured
- Health recovery (emotional, physiological, cognitive)
- How it was read
- based on the abstract, not the full text
- What the review says it includes
- Systematic review and meta-analysis
- Studies and participants, as stated
- N=15 studies; 1285 participants
- What it measured
- Self-esteem and mood (mental health indicators)
- How it was read
- based on the abstract, not the full text
- What the review says it includes
- Multi-study analysis / meta-analysis
- Studies and participants, as stated
- 10 UK studies; 1252 participants
- What it measured
- Restorative effects: psychological outcomes (perceived restorativeness, restoration, emotions, enjoyment, intentions) and physiological measures (cortisol, heart rate, HRV) across natural, urban, indoor 1-hour walks
- How it was read
- based on the abstract, not the full text
- What it measured
- Cognitive reaction time and emotional well-being.
- How it measured it
- Deary-Liewald computer-based simple reaction time test (SRT) and mood scale.
- How it was read
- read in full text
- What it measured
- Mental health and wellbeing outcomes.
- How it was read
- read in full text
- What it measured
- State well-being.
- How it measured it
- Short Warwick Edinburgh Mental Wellbeing Scale (validated).
- How it was read
- read in full text
- What it measured
- Mental health.
- How it measured it
- Profile of Mood States (POMS), Positive and Negative Affect Schedule (PANAS), 12-Item Short Form Health Survey (SF-12).
- How it was read
- read in full text
- What the review says it includes
- Systematic review and meta-analysis of 26 studies
- Studies and participants, as stated
- N=1,468 participants across 26 studies
- Heterogeneity, as stated
- Residual heterogeneity
- Heterogeneity, as stated
- Measurement heterogeneity
- What it measured
- Resting autonomic function (HR and lnHF).
- How it measured it
- HR monitors and eMotion sensor (objective).
- How it was read
- read in full text
- What it measured
- Positive and negative affect.
- How it measured it
- Positive and Negative Affective Schedule (PANAS) (self-report).
- Its conclusion, in its own words
- “The findings will help convince the health professionals and policymakers to encourage the residents to increase their time spent in the natural environment.”
- How it was read
- read in full text
- What the review says it includes
- Systematic review and meta-analysis of 20 studies
- Heterogeneity, as stated
- Extreme heterogeneity among studies
- Heterogeneity, as stated
- Low credibility of evidence due to high heterogeneity and inconsistent results
- What it measured
- Anxiety, Depression, Mood, Quality of Life.
- How it measured it
- Validated instruments such as Beck Depression Inventory, State-Trait Anxiety Inventory, Profile of Mood States, General Health Questionnaire.
- Its conclusion, in its own words
- “Our meta-analysis suggested that forest bathing can significantly reduce symptoms of depression and anxiety.”
- How it was read
- read in full text
- What the review says it includes
- Systematic review and meta-analysis of 36 studies
- Studies and participants, as stated
- N=3554 participants across 36 studies
- What it measured
- Stress reduction (heart rate, blood pressure, respiratory rate, MAP, perceived stress, SPO2)
- How it was read
- screened only, not extracted
- What it measured
- Human health and cognitive performance; methodological moderators of study findings
- How it was read
- screened only, not extracted
- What the review says it includes
- Systematic review (of experiments)
- Studies and participants, as stated
- 175 experiments in 148 research articles
Every source below is shown with its study design and links to the original study. This is the audit trail.
“Abstract only” means the review read that paper’s abstract, not its full text; “screened only” means it was included at re-screening and not extracted. Both stay in the trail with their DOI, because how a source was read is part of the audit.