The majority of studies investigating associations between physical activity and mental health in adolescents have been cross-sectional in design. Potential associations between physical activity and mental health may be better examined longitudinally as physical activity levels tend to decrease in adolescence. Few studies have investigated these associations longitudinally in adolescents and none by measuring physical activity objectively. A total of 158 Dutch adolescents (mean age 13.6 years, 38.6 % boys, grades 7 and 9 at baseline) participated in this longitudinal study. Physical activity, depressive symptoms and self-esteem were measured at baseline and at the 1-year follow-up. Physical activity was objectively measured with an ActivPAL3™ accelerometer during one full week. Depressive symptoms were measured with the Center for Epidemiologic Studies Depression Scale (CES-D) and self-esteem was assessed with the Rosenberg Self-Esteem Scale (RSE). Results were analysed using structural equation modelling.
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To prevent the social worker being jammed between the economic and rationalized logic of managers and politicians on the one hand, and the life world of the people on the other, he needs to develop a healthy identity. The social constructive view can help to overcome the identity crisis the social professional is in. It offers a model to analyze the conflict a social professional has to deal with, and forces the social worker to make a clear and moral choice for the life world of his clients. This view seems also suitable to develop an indigenous body of practice theory for social work. The presence theory, the family group work and constructive social work demonstrates the possibilities. To regain confidence from both the people and the politicians, the rationalized system of planning and control has to be replaced by the trust model. To develop this model we have to find ways to justify the money used in this sector.
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