Physical Activity through a Classroom-Based Intervention: A Pragmatic Non-Randomized Trial among Swedish Adolescents in an Upper Secondary School

Schools are an important arena to curb the decline in physical activity (PA) in youth. School-based interventions with accelerometer-measured PA are warranted. This study aimed to increase accelerometer-measured PA in adolescents following a 12-month school-based intervention. Two school-classes of...

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Bibliographic Details
Published in:International journal of environmental research and public health 2021-10, Vol.18 (21), p.11041
Main Authors: Christiansen, Filip, Ahlqvist, Viktor H, Nyroos, Mikaela, Löfgren, Hans, Berglind, Daniel
Format: Article
Language:English
Subjects:
Accelerometer
Accelerometers
Adolescent
Adolescents
Child development
Classrooms
Exercise
Humans
Intervention
Medicin och hälsovetenskap
Mental health
Physical activity
Physical education
Public speaking
School-based intervention
Schools
Secondary schools
Sedentary Behavior
Statistical analysis
Students
Sweden
Teenagers
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Summary:Schools are an important arena to curb the decline in physical activity (PA) in youth. School-based interventions with accelerometer-measured PA are warranted. This study aimed to increase accelerometer-measured PA in adolescents following a 12-month school-based intervention. Two school-classes of 16-18-year-old Swedish students were allocated to intervention group and control group. Accelerometer-measured PA was gathered at baseline, 6- and 12-month follow-up. Mixed-effects linear regression was used to investigate between-group and within-group differences in mean minutes per day (min/day) of moderate to vigorous PA (MVPA), light PA (LPA) and sedentary time (ST). Fifty-seven students participated (intervention group = 31, control group = 26). At 12-month follow-up, the intervention group performed 5.9 (95% CI: -4.3, 16.2) min/day more in MVPA, 1.8 (95% CI: -17.9, 14.2) min/day less in LPA, and 4.1 (95% CI: -27.3, 19.2) min/day less in ST compared to the control group. Within the intervention group, there was no significant change in PA. Within the control group, LPA decreased (95% CI: -19.6, -0.2; = 0.044) and ST increased (95% CI: 1.8, 30.8; = 0.028). Although no between-group differences in PA were statistically significant, the within-group changes may suggest a preventive impact on the decline in PA during adolescence.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph182111041