Changes in mobility and exposures to physical activity promoting environments over the course of two weight loss interventions in women at risk of breast cancer

Keywords: dynamic exposure, kernel density estimate, activity space, trip detection, walkability, recreation, NDVI, air pollution, accelerometer, cancer risk
Session Type: Virtual Paper Abstract
Day: Tuesday
Session Start / End Time: 3/1/2022 08:00 AM (Eastern Time (US & Canada)) - 3/1/2022 09:20 AM (Eastern Time (US & Canada))
Room: Virtual 41

Abstract

Physical activity (PA) focused interventions are one approach for reducing breast cancer risk and improving outcomes for those diagnosed with breast cancer. It is important to better understand factors that lead to successful adhesion and maintenance of such interventions. Two such factors are mobility and environmental exposures during an intervention, which may have mediating or moderating effects on the intervention outcome and participants’ ability to adhere to the intervention. In this study we focus on exploring how women at risk of breast cancer experienced changes in daily mobility patterns and environmental exposures during two successful weight loss interventions: the Reach for Health (RfH) and Metabolic, Exercise, and Nutrition at University of California San Diego (MENU) studies. Utilizing Global Positioning System (GPS) and accelerometer sensor data worn for one week at baseline and 6-month follow up, we assessed changes in total and PA-related mobility (time spent in life-space domains, convex hull activity space, and trip length and duration) over the course of the 6-month interventions. Our research question is if changes in total or PA-related mobility between baseline and 6-months are related to socio-demographic or neighborhood-level factors. We also assessed changes in environmental exposures (walkability, recreation spaces, greenness, air pollution) by PA intervention compared to the control group. In that analysis we ask if PA intervention arms see increasing or decreasing environmental exposures compared to the control group over the course of the intervention.