Nature Walks or Exercise as a Group Activity, the Effect Well-being, Sleep and Activity.

In this non-randomized, intention-to-treat, pilot study we recruited clients at the health and social service centre in Sipoo, Finland. Participants (n=79) chose between two social prescribing programs, either taking part of guided walks in nature, including immersion in a forest with high biodiversity, or taking part in a sports group with a versatile program. Inclusion was not based on diagnosis, but an identified need of improving health. Mental wellbeing was assessed using the 14-item Warwick-Edinburgh Mental Well-Being Scale (WEMWBS), additional questions evaluated perceived health and sleep. Amount and quality of sleep and physical activity were measured using wrist-worn accelerometers. Assessments took place before and after the 8-week intervention, as we were interested in the effect on everyday life. Even though participants lived in an area with abundant green space, taking part in the prescribed nature program improved mental wellbeing. Those who initially rated their health and mental health as good did achieve benefit from both programs, while those in poor health received better aid from the nature group. Initial study plan aimed for 160 participants, with an equal distribution between the groups. The programs were completed in 2018-2019 (spring + autumn) The COVID-19 outbreak hindered group activities 2020, a nature-group was organized in autumn 2020.