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Effects of a school-based physical activity program on physical and psychosocial quality of life in elementary school children: a cluster-randomized trial
Hartmann T, Zahner L, Puhse U, Puder JJ, Kriemler S
Pediatric Exercise Science 2010 Nov;22(4):511-522
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

The present study tested the effect of a school-based physical activity (PA) program on quality of life (QoL) in 540 elementary school children. First and fifth graders were randomly assigned to a PA program or a no-PA control condition during one academic year. QoL was assessed by the Child Health Questionnaire at baseline and postintervention. Based on mixed linear model analyses, physical QoL in first graders and physical and psychosocial QoL in fifth graders were not affected by the intervention. In first graders, the PA intervention had a positive impact on psychosocial QoL (effect size (d), 0.32; p < 0.05). Subpopulation analyses revealed that this effect was caused by an effect in urban (effect size (d), 0.38; p < 0.05) and overweight first graders (effect size (d), 0.45; p < 0.05). In conclusion, a school-based PA intervention had little effect on QoL in elementary school children.

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