In 2019, a research team at the University of Exeter published findings from one of the largest studies ever conducted on human nature contact. Nearly 20,000 adults in England reported how much time they spent in natural environments each week. The data showed something clear and clinically useful: people who spent at least 120 minutes per week in nature were significantly more likely to report good health and high wellbeing. Below that threshold, the benefit disappeared. Above it, the benefit plateaued around 200 to 300 minutes. Two hours a week was the number that mattered.
This guide explains what the study found, how robust the evidence is, what mechanisms explain it, and how to apply it practically.
Table of Contents
- Why This Question Matters
- How the Study Was Conducted
- The 120-Minute Threshold: What the Data Shows
- Why Nature Contact Improves Health
- Practical and Policy Implications
- How to Apply the 120-Minute Target
- Limitations of the Study
- Frequently Asked Questions
- Related Posts
Why This Question Matters
Prior research had established associations between living near green spaces and better health outcomes: lower rates of cardiovascular disease, obesity, diabetes, depression, and premature mortality. But proximity to green space is not the same as spending time in it. A person living adjacent to a park may never visit it. And someone without nearby green space may travel to natural environments regularly.
The question the 2019 study set out to answer was more precise: is there a dose-response relationship between recreational nature contact and health outcomes? And if so, is there a threshold — an amount that makes a meaningful difference — that could be translated into public health guidance as directly as the 150-minutes-per-week physical activity recommendation? The answer turned out to be yes.
How the Study Was Conducted
The study, led by Dr. Mathew P. White at the University of Exeter’s European Centre for Environment and Human Health, used data from a large ongoing population survey. The weighted sample included 19,806 adults representative of the English adult population. Participants reported time spent in natural environments over the previous seven days for health or wellbeing purposes — explicitly excluding routine commuting and occupational activities.
Weekly nature contact was calculated by multiplying typical visit duration by visit frequency and grouped into 60-minute categories: zero, 1 to 59 minutes, 60 to 119 minutes, 120 to 179 minutes, and so on. Outcome measures were self-reported general health (good or very good versus fair, bad, or very bad) and subjective wellbeing assessed with a validated mental wellbeing scale.
The analyses were adjusted for a comprehensive list of potential confounders: age, sex, ethnicity, socioeconomic status, employment, relationship status, presence of children, dog ownership, long-term illness, urban or rural status, neighbourhood greenspace percentage, area deprivation, air pollution, physical activity levels, and survey year. This level of control is notably rigorous for an observational study of this scale.
The 120-Minute Threshold: What the Data Shows
The findings were consistent and dose-dependent. Below 120 minutes per week, there was no statistically significant health or wellbeing advantage over zero nature contact after full adjustment. At 120 to 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 nature exposure. Benefits peaked around 200 to 300 minutes weekly, with limited additional gains beyond that range.
Crucially, how the 120 minutes was accumulated didn’t matter. One extended visit or multiple shorter outings produced comparable results. The total weekly duration was the relevant variable. Most participants achieved their nature time within two miles of home, confirming that local parks, green corridors, and accessible natural areas are sufficient — remote or wild landscapes are not necessary.
The threshold effect held consistently across demographic subgroups: men and women, younger and older adults, different ethnic backgrounds, levels of economic deprivation, and individuals with or without long-term health conditions. The robustness across such diverse groups is one of the study’s most significant strengths.
Why Nature Contact Improves Health
The 2019 study was observational and did not test mechanisms directly, but supporting research points to several converging pathways. Attention Restoration Theory proposes that natural environments restore directed attentional capacity that is depleted by urban cognitive demands, reducing mental fatigue. Stress Response Theory proposes that natural environments trigger physiological downregulation of the sympathetic nervous system, reducing cortisol and inflammatory markers. Research on phytoncides — volatile compounds released by trees — shows direct immune effects including activation of Natural Killer cells.
Social and physical activity pathways also contribute. Nature environments encourage movement and social interaction, both independently beneficial for health. The multisensory character of natural environments — varied visual complexity, natural sounds, fresh air, physical ground surfaces — engages the nervous system in ways that indoor or built environments do not. These factors likely operate simultaneously rather than independently, producing a cumulative effect that explains why the benefits are measurable and durable.
Practical and Policy Implications
The 120-minute guideline has direct practical utility. It is specific enough to be actionable (unlike the general recommendation to “spend time in nature”) and flexible enough to be achievable by people with varied schedules and limited access to natural environments. Health professionals can incorporate it into lifestyle counselling. Urban planners can use it to justify investment in accessible green infrastructure. Employers and schools can design policies that facilitate regular nature breaks.
Several health systems have already implemented nature prescription programmes informed by this research. In the UK, social prescribing schemes increasingly include structured nature walks and green exercise as prescribed interventions. In Japan, Shinrin-yoku (forest bathing) programmes operate within hospital systems. The 2019 study provided the quantitative foundation that justified these programmes as evidence-based rather than merely wellness-oriented.
How to Apply the 120-Minute Target
Two hours per week in nature is a realistic target for most people with access to any green space. It averages to approximately 17 minutes per day, or two one-hour walks spread across the week, or a single longer weekend outing. The most effective approaches combine purposeful scheduling with reduced phone use during nature time, which research suggests enhances the restorative and stress-reducing benefits.
Parks, woodlands, beaches, riverbanks, and green corridors all qualify. The nature doesn’t need to be pristine or remote — urban parks within walking distance produce measurable benefits when visited consistently. Combining nature time with social activities, light exercise, or mindful observation practices compounds the benefit across multiple health dimensions simultaneously.
Limitations of the Study
As a cross-sectional study, the 2019 research demonstrates association rather than causation. Healthier, more motivated individuals may simply spend more time outdoors, partially explaining the correlation. Reliance on self-reported nature contact introduces potential recall bias. The sample reflects a high-income, urbanised, English-speaking population, limiting confident generalisation to other cultural or environmental contexts. The measure captured recreational visits and excluded incidental nature exposure during commuting or work. Longitudinal and experimental studies are needed to confirm the causal direction of the relationship and to test whether interventions that increase nature contact improve health outcomes in populations that currently receive less.
Frequently Asked Questions
What counts as nature for the 120-minute recommendation?
The study defined nature as parks, woodlands, beaches, rivers, and other green or blue natural spaces. Urban parks qualify. The definition is broad enough that most people with access to any green space can accumulate the recommended exposure without travelling to remote natural environments.
Does it matter how the 120 minutes is spread across the week?
No. The 2019 study found that total weekly duration was the relevant variable, not how it was distributed. One extended weekend visit or multiple shorter weekday outings produced comparable health and wellbeing outcomes.
Is 120 minutes more or less effective than 300 minutes?
The data showed benefits peaking around 200 to 300 minutes per week with limited additional gains beyond that range. The 120-minute threshold marks the point where meaningful benefits begin to emerge reliably. Higher doses continue to show positive associations up to approximately 300 minutes, after which the dose-response curve flattens.
Can people with long-term health conditions benefit?
Yes. The 120-minute threshold was consistent across subgroups including individuals with long-term health conditions. The study found the beneficial association held regardless of health status, age, sex, or socioeconomic background.
