Wednesday, April 20, 2011
Mediators of effective energy-balance interventions in youth
Dr. Maartje van Stralen and colleagues just published a systematic review of studies on identification of psychosocial and environmental mediators of school-based interventions for youth, aiming to change physical activity, dietary and/or sedentary behaviours. The review paper was published in the International Journal of Obesity and was conducted as part of the ENERGY project, a cross-European and European Commission funded project to inform effective prevention of overweight and obesity in schoolchildren across Europe. Twenty-four studies were identified in the scientific literature. Based on the review of these 24 studies, strong evidence for self-efficacy and moderate evidence for intention as mediators of physical activity interventions was found, i.e. improvements in physical activity were brought about via positive changes in self-efficacy and intentions. Some evidence was found that attitudes, knowledge and habit strength were mediators of dietary behaviour interventions. Too few studies were avialbale on interventions aiming to reduce sedentary time to draw any conclusions regarding potential mediators.
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