Exploring the Relationship between Urban Park Greenery at Different Levels and Physical Activity: A Study Using the Hierarchical Linear Model

Urban parks play a pivotal role in shaping physical activity (PA), yet our comprehension of the specific influence of park greenery remains limited. In this study, we focused on three Shanghai urban parks, conducting a comprehensive year-long on-site observation to delve into greenery's impact on PA. By employing the hierarchical linear model analysis, we uncovered a robust correlation between internal and surrounding park greenery and PA density and diversity. Within a 400 m radius, indicators such as normalized difference vegetation index, green view ratio, Shannon's diversity index, and color-leaf plant ratio demonstrated a negative relationship with PA density. Conversely, the green coverage ratio and green view ratio within the 400 m radius exhibited a positive link with PA density. In terms of PA diversity, factors such as green visibility rate, color-leaf plants, and green coverage ratio displayed negative associations, while the 400 m green view ratio showcased a positive impact. Notably, our study revealed a dual interplay between internal and surrounding greenery, manifesting as both collaborative and competitive dynamics that collectively shape PA. Additionally, we subjected greenery indicators to seasonal assessments, yielding insights that illuminate how urban park greenery shapes PA. These findings offer valuable guidance for future park planning and fostering environments conducive to PA.