CONSIDERATIONS FOR USING A HIP OR WAIST WORN ACCELEROMETER TO CAPTURE PHYSICAL ACTIVITY

Hip/waist-worn accelerometers are popular because they measure motion close to the center of mass in the body. One such device, from Actigraph, has been applied in two large population-based studies (i.e.,NHANES; AGES-Reykjavik). Acceleration of motion is typically measured in either one axis (uniaxial) or three (triaxial). Benefits include an internal sampling frequency programmable for customized data output and a long battery-life (i.e., up to 20 days).