Calibration of the global physical activity questionnaire to Accelerometry measured physical activity and sedentary behavior.

Background: Self-report questionnaires are a valuable method of physical activity measurement in public health research; however, accuracy is often lacking. The purpose of this study is to improve the validity of the Global Physical Activity Questionnaire by calibrating it to 7 days of accelerometer measured physical activity and sedentary behavior.

Methods: Participants (n = 108) wore an ActiGraph GT9X Link on their non-dominant wrist for 7 days.