The ‘dose’ of nature required for health benefits, and whether repeat visits to the same environment consistently confer health benefits, is unclear. We sought to provide proof of concept for testing this. Data were collected on repeated visits to either a natural or pleasant urban environment from 41 adults on three days, and at one follow-up assessment. Participants completed baseline profiling, then attended; three repeated visits to either an urban (n = 17) or natural (n = 24) environment; and a 24-hour post-exposure final session. In each environment, participants undertook a 30-minute walk at a self-directed pace. Measures included mood, cognitive function, restorative experience and salivary cortisol. Walking in both environments conferred benefits for mood, with additional improvements in restorative experience observed from visiting the natural environment. There was no change in response to visits to the natural environment over time, suggesting benefits may be consistently realized.

尚不清楚健康益处所需的自然“剂量”，以及重复访问同一环境是否始终带来健康益处。我们试图提供概念验证来进行测试。在三天的时间内对41名成年人进行了一次自然或宜人的城市环境反复访问，并进行了一次随访评估，收集了数据。参与者完成了基线分析，然后参加了会议；对城市（n  = 17）或自然（n = 24）环境；以及曝光后24小时的最后阶段。在每种环境下，参与者都可以按照自己的步调进行30分钟的步行。测量包括情绪，认知功能，恢复经验和唾液皮质醇。在这两种环境中行走都可以为情绪带来好处，并且通过参观自然环境可以改善恢复体验。随着时间的流逝，对自然环境的访问没有变化，这表明可能会持续实现收益。