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Is Physical Activity Differentially Associated With Different Types of Sedentary Pursuits?
Debbie Ehrmann Feldman, PhD;
Tracie Barnett, MSc;
Ian Shrier, MD, PhD;
Michel Rossignol, MD, MSc;
Lucien Abenhaim, MD, ScD
Arch Pediatr Adolesc Med. 2003;157:797-802.
Objective To determine whether there is a relationship between the time adolescents spend in physical activity and time they spend in different sedentary pursuits: watching television, playing video games, working on computers, doing homework, and reading, taking into account the effect of part-time work on students' residual time.
Design Cross-sectional cohort design.
Participants and Setting Seven hundred forty-three high school students from 2 inner-city public schools and 1 private school.
Methods Students completed a self-administered questionnaire that addressed time spent in physical activity, time spent in sedentary pursuits, musculoskeletal pain, and psychosocial issues and were also measured for height and weight.
Main Outcome Measure Level of physical activity (low, moderate, high).
Results There were more girls than boys in the low and moderate physical activity groups and more boys than girls in the high activity group. Ordinal logistic regression showed that increased time spent in "productive sedentary behavior" (reading or doing homework and working on computers) was associated with increased physical activity (odds ratio, 1.7; 95% confidence interval, 1.2-2.4), as was time spent working (odds ratio, 1.3; 95% confidence interval, 1.2-1.4). Time spent watching television and playing video games was not associated with decreased physical activity.
Conclusions Physical activity was not inversely associated with watching television or playing video games, but was positively associated with productive sedentary behavior and part-time work. Some students appear capable of managing their time better than others. Future studies should explore the ability of students to manage their time and also determine what characteristics are conducive to better time management.
From the Groupe de recherche interdisciplinaire en santé, École de Réadaptation, Université de Montréal (Dr Feldman), Centre for Clinical Epidemiology and Community Studies, Sir Mortimer B. Davis Jewish General Hospital (Drs Feldman, Shrier, Rossignol, and Abenhaim), and Direction de la Santé Publique, Montréal Centre (Ms Barnett and Dr Rossignol), Montréal, Québec.
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