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A Systematic Review and Meta-Analysis of Nature-Based Mindfulness: Effects of Moving Mindfulness Training into an Outdoor Natural Setting

Dorthe Djernis, Inger Lerstrup, Dorthe Varning Poulsen, Ulrika Karlsson Stigsdotter, Jesper Dahlgaard, Mia Skytte O’Toole

International Journal of Environmental Research and Public Health September 2, 2019 DOI: 10.3390/ijerph16173202 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Systematic review and meta-analysis Peer reviewed
Sample size 2,990
Population Participants in 25 quantitative studies of nature-based mindfulness interventions
Intervention Nature-based mindfulness
Topics Meditation
Citations 154
Key findings Across 25 studies and 2,990 participants, nature-based mindfulness interventions showed a statistically significant medium-sized overall effect (g = 0.54) on combined psychological, physiological, and interpersonal outcomes. Effects were numerically larger in forests or wild nature than in gardens or parks, and for informal compared with formal mindfulness. The authors caution that the small number of studies, heterogeneity, and generally low quality limit interpretation.

Abstract

Research has proven that both mindfulness training and exposure to nature have positive health effects. The purpose of this study was to systematically review quantitative studies of mindfulness interventions conducted in nature (nature-based mindfulness), and to analyze the effects through meta-analyses. Electronic searches revealed a total of 25 studies to be included, examining 2990 participants. Three analyses were conducted: Nature-based mindfulness interventions evaluated as open trials (k = 13), nature-based mindfulness compared with groups in non-active control conditions (k = 5), and nature-based mindfulness compared with similar interventions but without contact with nature (k = 7). The overall combined psychological, physiological, and interpersonal effects from pre- to post-intervention were statistically significant and of medium size (g = 0.54, p < 0.001). Moderation analyses showed that natural environments characterized as forests/wild nature obtained larger numerical effects than environments characterized as gardens/parks, as did informal mindfulness compared with formal mindfulness. The small number of studies included, as well as the heterogeneity and generally low quality of the studies, must be taken into consideration when the results are interpreted. PROSPERO registration number: CRD42017065639.

Comparable studies

Other systematic reviews and meta-analyses on meditation, most cited first.

Study Year Design Participants
Meditation Programs for Psychological Stress and Well-being Diverse adult clinical populations 2014 Meta-analysis n = 3,515
Mindfulness-Based Stress Reduction for Stress Management in Healthy People: A Review and Meta-Analysis Healthy subjects 2009 Systematic review and meta-analysis
The psychological effects of meditation: A meta-analysis. Nonclinical groups of adult meditators 2012 Meta-analysis n = 163
Efficacy of Mindfulness-Based Cognitive Therapy in Prevention of Depressive Relapse Adults with recurrent depression in full or partial remission 2016 Meta-analysis of individual patient data from randomized controlled trials n = 1,258
Mindfulness‐Based Stress Reduction and Mindfulness‐Based Cognitive Therapy – a systematic review of randomized controlled trials 2011 Systematic review

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