Parks containing a paved or unpaved trail and parks with wooded areas were 7 times more likely to be used for physical activity than parks without such features. The size of the park and its distance from users' homes were not significant predictors of physical activity.
Kaczynski, Andrew T., Potwarka, Luke, Saelens, Brian E. (2008) Association of park size, distance, and features with physical activity in neighborhood parks. American Journal of Public Health 98(8), 1451-1457.
