title: A Multicomponent Schoolyard Intervention Targeting Children's Recess Physical Activity and Sedentary Behavior: Effects After One Year.
abstract: Background Aim of the study was to test the 12-month effects of a multicomponent physical activity (PA) intervention at schoolyards on recess PA levels of 6th and 7th grade children in primary schools, combining Global Positioning System (GPS) and accelerometry data. Methods A quasi-experimental study design was used with 20 paired intervention and control schools. GPS confirmatory analyses were applied to validate attendance at schoolyards during recess. Data from 376 children from 7 pairs of schools were included in the final analyses. Pooled intervention effectiveness was tested by multilevel linear regression analyses, whereas effectiveness of intervention components was tested by multivariate linear regression analyses. Results Children exposed to the multicomponent intervention increased their time spent in light PA (+5.9%) during recess. No pooled effects on Moderate-to-Vigorous PA were found. In depth-analyses on intervention components showed that physical schoolyard interventions particularly predicted a decrease in time spent in sedentary behavior during recess at follow-up. Intervention intensity and school's commitment to the project strengthened this effect. Conclusions The multicomponent schoolyard PA intervention was effective in making children spend a larger proportion of recess time in light PA, which was most likely the result of a shift from sedentary behavior to light PA.
authors: 1 Department of Health Promotion, School of Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands.|2 Academic Collaborative Center for Public Health Limburg, Public Health Services, Geleen, The Netherlands.|3 School of Sports Studies, Fontys University of Applied Sciences, Eindhoven, The Netherlands.
authors: Dave H H
authors: DH
authors: Van Kann
authors: 4 The Hague University of Applied Sciences, Research group Healthy Lifestyle in a Supporting Environment, The Hague, The Netherlands.
authors: S I
authors: SI
authors: de Vries
authors: 5 Department of Sports Science and Clinical Biomechanics, Research Unit for Active Living, University of Southern Denmark, Odense, Denmark.
authors: J
authors: J
authors: Schipperijn
authors: 1 Department of Health Promotion, School of Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands.|2 Academic Collaborative Center for Public Health Limburg, Public Health Services, Geleen, The Netherlands.
authors: N K
authors: NK
authors: de Vries
authors: 2 Academic Collaborative Center for Public Health Limburg, Public Health Services, Geleen, The Netherlands.|6 Department of Health Services Research, School of Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands.
authors: M W J
authors: MW
authors: Jansen
authors: 7 Department of Health Promotion, Nutrition and Translational Research Institute Maastricht (NUTRIM), Maastricht University, Maastricht, The Netherlands.
authors: S P J
authors: SP
authors: Kremers
keywords: Accelerometry; Built environment; GPS; Moderation; Youth