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©2019 Türkiye Spor Hekimleri Derneği. Tüm hakları saklıdır. ABSTRACT Objective: It is essential to conduct validity and reliability studies of physical activity, inactivity, and sedentary behavior questionnaires due to increasing inactivity and sedentary lifestyle. The aim of the study was to evaluate the validity and reliability of the Turkish version of Adolescent Sedentary Activity Questionnaire (ASAQ) developed by Hardy, Booth, and Okely which has been adapted to Turkish culture. Methods: The 5 to 8th grade students (aged 11-14 years) were involved in the validity (n=155) and reliability studies (n=305). After cultural adaptation and pilot study, the validity and reliability of ASAQ were examined by using the intraclass correlation coefficient (ICC). Physical Activity Diary was used for the determination of the concurrent validity of ASAQ. To examine the test–retest reliability, the participants completed the ASAQ twice with one week interval. Results: It was determined that the validity coefficient of total sedentary times of ASAQ for all week of children aged 11-14 years was moderate level (ICC=0.53). The validity coefficients of total sedentary times of ASAQ for the whole week of children aged 11, 12, 13, 14 years were found to be moderate level (respectively, ICC=0.56; ICC=0.44; ICC=0.44; ICC=0.51). The reliability coefficient of total sedentary times of ASAQ for all week of children aged 11-14 years was determined to be a good level (ICC= 0.71). While the reliability coefficient of total sedentary times of ASAQ for all week of children aged 11 and 12 years was founded to be excellent level (respectively, ICC=0.79; ICC=0.77), the reliability coefficient for children aged 13 and 14 years was seen to be a good level (respectively, ICC=0.64; ICC=0.69). Conclusion: It was concluded that ASAQ is a valid and reliable questionnaire that evaluates the sedentary activity times of weekdays, weekends and the total week of Turkish children between the ages of 11-14.

Validity and Reliability of the Adolescent Sedentary Activity Questionnaire (ASAQ) in Adolescents Aged Between 11 and 14