Feasibility of accelerometers for measuring children's daily physical activity

Abstract

Understanding physical activity is essential in the fight against child obesity. Certain accelerometers may be more useful in assessing this variable in children; easier to wear devices may facilitate better compliance and measurement over longer time periods. The objectives of this study were to a) compare children's acceptability of various accelerometers and b) compare their research utility. Children 7–10 y (n=25) were recruited within Yolo County, CA to test each of three accelerometers; the Philips Actical™ (worn on hip), the SenseWear BodyMedia™ (upper arm) and the Polar Active™ (wrist). Each week children received a device to wear over 5 continuous days. Parents were asked to note device removals. After each use, children and parent each completed a structured interview with trained staff. Upon completion, children were asked to place the devices in order from most to least preferred. The Polar Active was most accepted by children and useful to researchers in providing data on activity intensity levels. This device also engaged children with real time feedback on activity achievements. These findings will aid researchers in choosing measurement tools for children's physical activity.Grant Funding Source : Foods for Health Institute