Global Physical Activity Questionnaire (GPAQ): Nine Country Reliability and Validity Study

Purpose: Instruments to assess physical activity are needed for (inter)national surveillance systems and comparison. Methods: Male and female adults were recruited from diverse sociocultural, educational and economic backgrounds in 9 countries (total n = 2657). GPAQ and the International Physical Activity Questionnaire (IPAQ) were administered on at least 2 occasions. Eight countries assessed criterion validity using an objective measure...