Is physical activity differentially associated with different types of sedentary pursuits?
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 increase
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