Estimation Technique
The RALA tool estimates physical activity using a variety of data sources, including the National Health and Nutrition Examination Survey (NHANES), the American Time Use Survey (ATUS), and the National Household Travel Survey (NHTS). These data sources provide information on the types of activities people engage in, how often they engage in these activities, and how long they spend doing them. The RALA tool then uses this information to estimate the number of calories that people burn through physical activity.