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Physical activity and sedentary behaviors in adolescents
Maria Paula Santos1, Helena Gomes, Jorge Mota
1Research Centre in Physical Activity and Leisure, University of Porto, Portugal.
Summary
Adolescent physical activity (PA) is influenced by sedentary behaviors. Increased computer use was linked to higher PA, while television viewing on weekends was lower in active youth.
Area of Science:
- Adolescent Health
- Behavioral Science
- Public Health
Background:
- Sedentary behaviors, including computer use, television viewing, and commuting, are prevalent among adolescents.
- Understanding the relationship between these behaviors and physical activity (PA) is crucial for promoting youth health.
Purpose of the Study:
- To investigate how sedentary behaviors affect physical activity in adolescents.
- To determine how physical activity characteristics differ based on adolescents' self-reported activity levels.
Main Methods:
- A questionnaire assessed physical activity and leisure activities in 450 adolescents (230 girls, 220 boys, mean age 14.6 years).
- Participants were categorized into 'nonactive' (sedentary/low active) and 'active' (moderately/vigorously active) groups.
- Sedentary behaviors (computer, TV, commuting) and PA characteristics (intensity, frequency, type) were analyzed.
Main Results:
- Girls were significantly more represented in the inactive group (71.7%) than boys.
- Active participants engaged more in moderate intensity, moderate frequency, and team activities.
- Increased weekday computer use predicted higher physical activity, while weekend TV watching was lower in active adolescents.
Conclusions:
- Sedentary behaviors like television viewing and computer use may have differential impacts on adolescent physical activity.
- The relationship between screen time and physical activity warrants further investigation in youth.