Setting/participantsThe trial was undertaken within secondary schools located in disadvantaged communities in New South Wales, Australia.
InterventionA multicomponent school-based intervention based on the Health Promoting Schools Framework was implemented. The intervention consisted of seven physical activity promotion strategies that targeted the curriculum (teaching strategies to increase physical activity in physical education lessons, student physical activity plans, and modification of school sport program); school environment (recess/lunchtime activities, school physical activity policy); parents (parent newsletters); and community (community physical activity provider promotion). Six additional strategies supported school implementation of the physical activity intervention strategies.
Main outcome measureMinutes per day spent in MVPA, objectively measured by accelerometer.
ResultsParticipants (N=1,150, 49% male) were a cohort of students aged 12 years (Grade 7) at baseline (March–June 2012) and 14 years (Grade 9) at follow-up (March–July 2014). At 24-month follow-up, there were significant effects in favor of the intervention group for daily minutes of MVPA. The adjusted mean difference in change in daily MVPA between groups was 7.0 minutes (95% CI=2.7, 11.4, p<0.002) (analysis conducted December 2014–February 2015). Sensitivity analyses based on multiple imputation were consistent with the main analysis (6.0 minutes, 95% CI=0.6, 11.3, p<0.031).
ConclusionsThe intervention was effective in increasing adolescents’ minutes of MVPA, suggesting that implementation of the intervention by disadvantaged schools has the potential to slow the decline in physical activity.
Trial registrationAustralian New Zealand Clinical Trials Registry ACTRN12612000382875.