Neighbourhood Greenness and Physical Activity in the Outdoors Children who spend time outdoors are more physically active. 139 One study of 10- to 12-year-olds, for example, found that physical activity increased by 27 minutes a week with every hour spent out- doors. 137 It is important to understand the role of neighbourhood greenness (e.g., connected streets, sidewalks, trails, recreation facilities, community playgrounds, green space) and how it can influence opportunities for physical activity in the outdoors. 136 A recent study shows that higher levels of neighbourhood greenness are associated with increased outdoor playtime in preschoolers. 140 68 Report Card on Physical Activity for Children and Youth | 2013 Active Healthy Kids Canada