“Go for a walk” is common advice for stress. What’s less commonly understood is the substantial, evidence-based science explaining exactly why that advice works and how to design nature-based support properly.

The Scale of the Need

Every year, one in four people will experience a mental health problem of some kind. In any given week in England, roughly one in six adults are experiencing a mental health difficulty. Despite significant expansion of mental health services over the past two decades, close to two-thirds of people with a common mental health problem are still not receiving treatment. Nature on Prescription has emerged as part of the response, a social prescribing approach connecting people with nature-based group activities as a recognised mental health intervention.

Attention Restoration Theory

One of the leading explanations for nature’s mental health benefits is Attention Restoration Theory, which proposes that natural environments counteract stress and restore the ability to focus and concentrate, capacities that become depleted through sustained cognitive demand. Alongside this, emerging evidence points to enhanced immune function and improvements in cardiovascular and respiratory health linked to time spent in nature.

Being Away From Stressors

One of the most consistently reported mechanisms is simply being away, physically removed from the usual environment associated with stress or difficulty. Participants in nature-based interventions describe outdoor settings as simple, peaceful, and crucially “other” to their normal surroundings. One participant in a wetland-based mental health programme described the shift powerfully: rather than “switching four walls for another four walls,” being outside felt like something bigger than themselves.

Multi-Sensory Experience

Being outside facilitates rich multi-sensory experience, different weather, sounds, scents, and sights that indoor environments simply cannot replicate. This sensory richness appears to play a meaningful role in why nature-based interventions produce effects that indoor equivalents often don’t match.

Physical Activity in Natural Settings

Exercise has well-documented, modest but significant positive effects on cognitive function and sleep quality, and physical activity interventions particularly benefit depressed older adults, a key group in social prescribing. Notably, exercise taking place in outdoor natural environments produces greater self-reported mental wellbeing benefits than equivalent exercise indoors.

Applying This Beyond Formal Prescription

While Nature on Prescription is a formal clinical pathway, the underlying mechanisms apply broadly to workplace and event design. Access to natural light, greenery, and outdoor space, even in small, considered doses, taps into genuinely evidence-based restorative mechanisms, not just anecdotal wellness trends.

At Calm Nest Collective, we draw on this research when designing outdoor-adjacent and biophilic elements into Calm Nest Spaces®, bringing evidence-based nature benefits into environments where full outdoor access isn’t possible.

Bring the science of nature into your next space. [Talk to Calm Nest Collective →]