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Published August 18, 2017 | Version v1
Journal article Open

Outdoor blue spaces, human health and well-being: A systematic review of quantitative studies

  • 1. ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
  • 2. European Centre for Environment & Human Health, University of Exeter Medical School, Truro, UK

Description

Abstract

Background: a growing number of quantitative studies have investigated the potential benefits of outdoor blue spaces (lakes, rivers, sea, etc) and human health, but there is not yet a systematic review synthesizing this evidence.

Objectives: to systematically review the current quantitative evidence on human health and well-being benefits of outdoor blue spaces.

Methods: following PRISMA guidelines for reporting systematic reviews and meta-analysis, observational and experimental quantitative studies focusing on both residential and non-residential outdoor blue space exposure were searched using specific keywords.

Results: in total 35 studies were included in the current systematic review, most of them being classified as of “good quality” (N=22). The balance of evidence suggested a positive association between greater exposure to outdoor blue spaces and both benefits to mental health and well-being (N=12 studies) and levels of physical activity (N=13 studies). The evidence of an association between outdoor blue space exposure and general health (N= 6 studies), obesity (N=8 studies) and cardiovascular (N=4 studies) and related outcomes was less consistent.

Conclusions: although encouraging, there remains relatively few studies and a large degree of heterogeneity in terms of study design, exposure metrics and outcome measures, making synthesis difficult. Further research is needed using longitudinal research and natural experiments, preferably across a broader range of countries, to better understand the causal associations between blue spaces, health and wellbeing.

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Funding

BlueHealth – Linking Up Environment, Health and Climate for Inter-sector Health Promotion and Disease Prevention in a Rapidly Changing Environment 666773
European Commission