Preprint / Version 1

Description of Physical Activity and Screen Time among U.S. Middle School Students


  • Xiaomei Song Department of Nursing, The Second Affiliated Hospital of Soochow University
  • Zikun Zhao
  • Yanxuan Jin
  • Siyo Chan
  • Kevin Chow



physical activity, screen time, high school, adolescence


Background: Physical activity is important for students in secondary school, however, trends in PA among secondary school students have shown a significant decline globally. There is a need to understand the physical activity of middle school students. Objective: The first objective is to identify the PA levels and screen time of students in middle school. The second objective of the study intends to examine the PA levels and screen time among students of different genders. Methods: participants from four consecutive two-year cycles of National Health and Nutrition Examination Survey were included in this study. Spearman correlation model was used to identify the correlation between participants’ demographics, PA, and screen time data. Negative binomial regression model was used to describe students’ PA and screen time (Dependent variable) in different grades (Independent variables). Gender and Age were taken as control variables. Results: After the data preprocessing, 2516 participants were included in this study. Significant correlation has been found between grade and PA, instead of screen time. Negative binomial regression shows that students have lowest PA in their transition year Year 6, and their screen time decreased with the grade increased. Significant difference can be found across gender. Future efforts should focus on developing school transition support programs designed to improve PA.


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Author Biographies

Zikun Zhao

Master in Sports Education, Faculty of Physical Education and Sport, Beijing normal university

Yanxuan Jin

Master of Education in Physical Education, Faculty of Educational Studies, Universiti Putra Malaysia

Siyo Chan

Master in Sports Education, School of physical education, Jiangsu Normal University


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