Risk Factor Discovery in Population Health

We study how the places people live and move through each day influence how physically active they are. We combine data from Fitbit, which tracks steps throughout the day, with information about the surrounding environment, such as access to parks, sidewalks, public transit, and neighborhood features. By looking at these data together, we identify common patterns in how people move in different environments. We then use these patterns to estimate how changes in urban design—such as adding green space or improving walkability—might increase daily activity and reduce long-term health risks. This work helps cities design healthier neighborhoods and find ways for all communities to realize the benefits of physical-activity-aware urban design.