ABSTRACT
Introduction ............................................................................................................ 212 Epidemiology ......................................................................................................... 212 Surveillance ............................................................................................................ 212 Key Characteristics of Physical Activity Surveillance Systems ............................ 214 Surveillance of Physical Activity Behavior ........................................................... 216
Surveillance of Children and Adolescents ........................................................ 218 Surveillance of Adults ....................................................................................... 218 Examples of U.S. Government Surveillance Systems that Measure Physical Activity Behavior ................................................................................ 218 Youth Risk Behavior Surveillance System ........................................................ 218 National Health Interview Survey ..................................................................... 219 Behavioral Risk Factor Surveillance System ....................................................220 National Household Travel Survey ................................................................... 222 Other Surveillance Systems .............................................................................. 222 Comparing Estimates from Different Surveillance Systems ............................. 223
Surveillance of Environmental and Policy Supports for Physical Activity............ 223 Questionnaires that Measure Environmental and Policy Supports for Physical Activity ...............................................................................................224 School Health Pro—les (Pro—les) .......................................................................224 School Health Policies and Programs Study .....................................................226 Observations of a Physical Environment that Measure Environmental and Policy Supports for Physical Activity ...............................................................226 Secondary Data Sources and Tools Used to Measure Environmental and Policy Supports for Physical Activity ...............................................................226
Uses of Physical Activity Surveillance Data .......................................................... 227 Set Health Goals or Objectives ......................................................................... 227 Monitor Trends in Physical Activity over Time ................................................ 227 Identify Populations at High Risk .....................................................................228 Create Awareness ..............................................................................................228 Develop and Evaluate Programs ....................................................................... 229
