TY  - JOUR
A1  - Borde, Ron
A1  - Smith, Jordan J.
A1  - Sutherland, Rachel
A1  - Nathan, Nicole
A1  - Lubans, David Revalds
T1  - Methodological considerations and impact of school-based interventions on objectively measured physical activity in adolescents: a systematic review and meta-analysis
JF  - Obesity reviews : an official journal of the International Association for the Study of Obesity
N2  - Objective: The aims of this systematic review and meta-analysis are (i) to determine the impact of school-based interventions on objectively measured physical activity among adolescents and (ii) to examine accelerometer methods and decision rule reporting in previous interventions. Methods: A systematic search was performed to identify randomized controlled trials targeting adolescents (age: >= 10 years), conducted in the school setting, and reporting objectively measured physical activity. Random effects meta-analyses were conducted to determine the pooled effects of previous interventions on total and moderate-to-vigorous physical activity. Potential moderators of intervention effects were also explored. Results: Thirteen articles met the inclusion criteria, and twelve were included in the meta-analysis. The pooled effects were small and non-significant for both total physical activity (standardized mean difference = 0.02 [95% confidence interval = -0.13 to 0.18]) and moderate-to-vigorous physical activity (standardized mean difference = 0.24 [95% confidence interval = -0.08 to 0.56]). Sample age and accelerometer compliance were significant moderators for total physical activity, with a younger sample and higher compliance associated with larger effects. Conclusion: Previous school-based physical activity interventions targeting adolescents have been largely unsuccessful, particularly for older adolescents. There is a need for more high-quality research using objective monitoring in this population. Future interventions should comply with best-practice recommendations regarding physical activity monitoring protocols.
KW  - Accelerometer
KW  - physical activity
KW  - school
KW  - youth
Y1  - 2017
U6  - https://doi.org/10.1111/obr.12517
SN  - 1467-7881
SN  - 1467-789X
VL  - 18
SP  - 476
EP  - 490
PB  - Wiley
CY  - Hoboken
ER  -