In an era of rapid urbanization and constant digital connectivity, spending time in nature has gained recognition as an accessible and effective way to support mental and physical health. A key 2019 study identified a practical threshold: at least 120 minutes of recreational nature contact per week is associated with significantly better self-reported health and wellbeing. Led by Dr. Mathew P. White and colleagues at the University of Exeter’s European Centre for Environment and Human Health, the research analyzed responses from nearly 20,000 adults in England. It stands as one of the most influential pieces of evidence in environmental psychology.
This article provides a detailed examination of the study, including its background, methodology, findings, implications, limitations, and practical applications.
Background and Rationale
Extensive prior research has associated living near green spaces with reduced risks of cardiovascular disease, obesity, diabetes, mental health issues, and premature mortality. Neighborhood greenspace offers passive benefits such as lower pollution levels and restorative views. However, active recreational time spent in natural settings—parks, woodlands, beaches, or rivers—may deliver additional advantages and can compensate for limited local greenery.
Earlier studies typically focused on visit frequency, single-session lengths, or residential proximity rather than total weekly exposure. This left a gap in understanding dose-response relationships suitable for public health guidance, similar to physical activity recommendations of 150 minutes per week. The 2019 study addressed this by creating a weekly nature contact metric using one of the largest ongoing assessments of population-level nature engagement.
It complemented contemporaneous work that demonstrated even 20–30 minute nature sessions can reduce stress biomarkers like salivary cortisol. The team extended this by examining cumulative weekly exposure and broader self-reported outcomes.
Methods: A Robust, Population-Level Approach
The analysis drew on survey data resulting in a weighted sample of 19,806 adults representative of the population. Participants reported time spent in natural environments over the previous seven days specifically for health or wellbeing purposes, excluding routine commuting or occupational activities.
Exposure variable: Total weekly minutes were derived by multiplying typical visit duration by visit frequency and grouped into 60-minute categories (0, 1–59, 60–119, 120–179, and so on). This produced a clear, actionable weekly dose measure.
Outcome measures:
- General health, dichotomized as “good/very good” versus “fair/bad/very bad.”
- Subjective wellbeing, assessed with a validated mental well-being scale and often split at the median.
Researchers applied survey-weighted logistic regression models with extensive adjustments for potential confounders, including age, sex, ethnicity, socioeconomic status, employment, relationship status, presence of children, dog ownership, long-term illness or disability, urban/rural status, neighborhood greenspace percentage, area deprivation, air pollution, physical activity levels, and survey year.
Additional analyses tested continuous exposure using splines, ordinal outcomes, and whether benefits depended on visit patterns (single long visit versus multiple shorter ones). Subgroup analyses checked consistency across demographic and health-status groups.
Main Results: A Clear Threshold at 120 Minutes
The findings revealed a distinct pattern:
- Below 120 minutes, there was no statistically significant advantage over zero nature contact after full adjustment.
- At 120–179 minutes per week, individuals had 59% higher odds of reporting good health and 23% higher odds of high wellbeing compared to those with no exposure.
- Benefits peaked around 200–300 minutes weekly, with limited additional gains thereafter.
Spline models suggested a gradual rise in positive associations up to approximately 120 minutes, further modest improvements to 200–300 minutes, and then a plateau. The threshold effect held across diverse groups: men and women, younger and older adults, different ethnicities, levels of deprivation, and individuals with or without long-term health conditions.
Importantly, the total weekly duration mattered more than how it was accumulated. One extended visit or several shorter outings produced comparable results. Most reported visits occurred within two miles of home, indicating that accessible local green spaces are sufficient.
The strength of the nature exposure association was meaningful when compared to established predictors such as neighborhood deprivation or physical activity.
Potential Mechanisms
Although the study was observational, supporting literature points to multiple pathways: attention restoration, stress reduction via lowered cortisol, opportunities for social connection or reflection, encouragement of physical movement, and possible immunological benefits from microbial diversity and plant compounds. These factors together contribute to both immediate mood improvements and longer-term wellbeing.
Practical and Policy Implications
The 120-minute guideline offers a realistic, low-cost target that health professionals can incorporate into lifestyle advice or formal nature prescriptions. Urban planners can prioritize accessible, high-quality green infrastructure, while employers and educators might encourage regular nature breaks. The flexibility of the dose makes it feasible for busy schedules and diverse populations, including those managing chronic conditions.
Post-pandemic interest in mental health has further amplified the relevance of these findings as societies seek scalable, non-pharmacological wellbeing strategies.
Limitations
As a cross-sectional study, it demonstrates association rather than causation; healthier or more motivated individuals may simply spend more time outdoors. Reliance on self-reported data introduces potential recall bias. The sample supports generalization to similar high-income, urbanized settings but may differ in other cultural or environmental contexts. The measure captured recreational visits and did not include incidental nature exposure. Further longitudinal and experimental studies are needed to confirm causality and refine guidelines.
Applying the Findings in Daily Life
To reach 120 minutes:
- Schedule regular short walks in nearby parks or green corridors.
- Combine nature time with social activities or light exercise.
- Practice mindful engagement—reducing screen use during outings—to enhance benefits.
- Track progress with a simple weekly log.
Communities can support this by improving path accessibility, adding seating, and protecting local natural areas. Families, older adults, and urban residents can all benefit with modest adjustments to routines.
The 2019 study provides compelling evidence that 120 minutes of weekly nature contact represents a meaningful threshold for improved health and psychological wellbeing. Its large, representative sample, rigorous controls, and consistent findings across subgroups make it a foundational reference in nature-health research. While further intervention studies are warranted, the current data supports integrating regular nature time into personal habits and public health strategies.
In a world facing both environmental degradation and mental health challenges, protecting and promoting access to nature offers dual benefits for human wellbeing and ecological awareness. Two hours a week—spread flexibly across days and achievable in ordinary local settings—stands as an evidence-based, attainable step toward healthier lives.
Citation
White, M. P., et al. (2019). Spending at least 120 minutes a week in nature is associated with good health and wellbeing. Scientific Reports.
https://www.nature.com/articles/s41598-019-44097-3
