Built Environment - Public Health

Public Health

In public health, built environments refer to physical environments that are designed with health and wellness as integral parts of the communities. Research has indicated that how neighborhoods are created can affect both the physical activity and mental health of the communities’ residents. Studies have shown that built environments that were expressly designed to improve physical activity are linked to higher rates of physical activity, which in turn, positively affects health.

Neighborhoods with more walkability had lower rates of obesity as well as increased physical activity among its residents. They also had lower rates of depression, higher social capital, and less alcohol abuse. Walkability features in these neighborhoods include safety, sidewalk construction, as well as destinations in which to walk. In addition, the perception of a walkable neighborhood, one that is perceived to have good sidewalks and connectivity, is correlated with higher rates of physical activity.

Assessments of walkability have been completed through the use of GIS programs. One such program, Street Smart Walk Score, is a walkability assessment tool which determines distances to grocery stores and other amenities, as well as connectivity and intersection frequency using specific addresses. Assessments such as Street Smart Walk Score can be utilized by city and county planning departments to improve existing walkability of communities.

Public health also addresses additional components of built environments including “bikeability” and healthy food access such as proximity to grocery stores and community gardens. Bikeability refers to the access that an area has granted to safe biking through multiple bike paths and bike lanes. Both walkability and bikeability have been cited as determinants of physical activity.

Access to healthy food is also an important component to the built environment. A higher density of convenience stores has been associated with obesity in children. In contrast, improved access to community supermarkets and farmer’s markets is correlated with lower overweight status. Specifically in low income neighborhoods, the presence of a local grocery store is correlated with lower BMI/overweight risk. Community gardens are also considered a part of the built environment, and have been shown to increase fruit and vegetable intake among gardeners. Scholars say that community gardens have also been shown to have positive social and psychological impacts that lead to lower levels of stress, hypertension, and an improved sense of wellness, affecting the overall health of the individual and the community.

The intersection of public health with other disciplines is evident in the design process of built environments which includes environmental planning, policy development and land-use planning. Research suggests that people are more active in mixed-use communities or those that incorporate retail and residential and densely populated areas as well as those with good street connectivity. Those who preferred to walk and live in walkable environments often have lower obesity rates and drive less over those who preferred living in auto-dependent environments. The strength of the evidence for reducing obesity through environment has been highlighted by the Center for Disease Control in its Common Community Measures for Obesity Prevention Project, which includes measures of healthy food access and physical activity environments.