Establishing wrist-based cutpoints for the Actical accelerometer in elementary school-aged children.

Background: The wrist has become a standard location for accelerometry (ACC) data collection, primarily to optimize compliance, yet interpretation of wrist ACC data is limited due to a lack of calibration studies. This study aimed to establish cutpoints for a wrist-mounted Actical accelerometer in 6- to 11-year-old children using 2 methods.

Methods: Metabolic and ACC data (15-sec epoch) were collected during 8 activities in 22 children ages 6-11.

Changes in physical activity and sedentary behavior in a randomized trial of an internet-based versus workbook-based family intervention study.

Background: The America on the Move (AOM) Family Intervention Program has been shown to prevent excess weight gain in overweight children. Providing intervention materials via the internet would have the potential to reach more families but may increase sedentary behavior. The purpose was to evaluate whether delivering the AOM Family Intervention via the internet versus printed workbook would have a similar impact on sedentary behaviors in children.