Sleep
Poor sleep surfaced as a clear finding, 81% slept less than 6 h per night and 70% of the participants also rated their sleep quality as poor. In the FinHealth 2017 study, the average self-reported sleep time was 7.4 h for adults aged over 30 years, with only 14% of the women and 16% of the men sleeping less than 6 h per night. Following the intervention, total sleep time improved in the Sports-group but decreased in the Nature-group. This change was close to significant and opposite to our expectation. Diminished sleep time was observed only in the participants with good self-rated health. Despite this accelerometer-based outcome, perceived sleep improved significantly in the Nature-group, with reduced time awake after sleep onset and reduced number of awakenings being likely explanations for the positive experience.Population studies have indicated that surrounding greenery has a positive impact on sleep duration (