Accelerometer and GPS Data to Analyze Built Environments and Physical Activity.

: Most built environment studies have quantified characteristics of the areas around participants' homes. However, the environmental exposures for physical activity (PA) are spatially dynamic rather than static. Thus, merged accelerometer and global positioning system (GPS) data were utilized to estimate associations between the built environment and PA among adults.

Accelerometer and GPS Analysis of Trail Use and Associations With Physical Activity.

Background: Concurrent use of accelerometers and global positioning system (GPS) data can be used to quantify physical activity (PA) occurring on trails. This study examined associations of trail use with PA and sedentary behavior (SB) and quantified on trail PA using a combination of accelerometer and GPS data.

Methods: Adults (N = 142) wore accelerometer and GPS units for 1-4 days.