Bruno Costa

Physical activity and sedentary behaviour have been linked to the mental health of children and adolescents, yet the timing of behaviours may play a role in this relationship and clarifying this could inform interventions. We explored cross-sectional associations of PA and SED in varying time segments throughout the school day with the mental health of school-aged children and adolescents from rural Northeastern Ontario, Canada. A total of 161 students wore accelerometers for 8 days and completed a self-report survey. Mental health was measured using the Strengths and Difficulties Questionnaire. Accelerometer-measured SED, light PA, and moderate and vigorous PA were estimated in the time-segments before school, school time, after school, and evenings. Associations were tested with multilevel linear regressions while adjusting for confounding factors. Students spent 72.6 min in MVPA, 209.0 min in LPA, and 621.0 min in SED per day. Daily SED was associated with less conduct problems. Evening LPA was inversely associated with hyperactivity, while SED was associated with hyperactivity and with peer problems before school, and during school. No associations were observed for MVPA, emotional symptoms, or prosocial behaviour. In conclusion, displacing SED with LPA in some specific periods of the day may benefit the mental health of students; taking this into account could strengthen interventions.

Schools have been the main context for physical activity and sedentary behavior interventions among adolescents, but there is inconsistent evidence on whether they also improve dimensions of the health−related quality of life. The aim of this study was to evaluate the effects of a school-based active lifestyle intervention on dimensions of HRQoL. A secondary aim was to verify whether sex, age, and HRQoL at baseline were moderators of the intervention effect. A cluster-randomized controlled trial was conducted at three control and three intervention schools in Florianopolis, Brazil. All students from 7th to 9th grade were invited to participate. A school year intervention, designed primarily to increase PA and reduce SB, included strategies focused on teacher training on PA, SB, and nutrition, and availability of teaching materials related to these contents; environmental improvements ; and education strategies, with the availability of folders and posters regarding PA, SB, and nutrition. Participants and the research staffs were not blinded to group assignment, but a standardized evaluation protocol was applied at baseline and after the intervention using the KIDSCREEN−27 to assess HRQoL across five dimensions. Mixed linear models were performed to evaluate the effect of the Movimente intervention on the five HRQoL dimensions. Of the 921 students who answered the questionnaire at baseline, 300 and 434 completed the study in control and intervention groups, respectively. The results revealed no significant effects of the intervention on any HRQoL dimensions. A reduction of the school environment dimension was observed in both the control and intervention groups. Sensitivity analyses showed that students in the highest baseline tertiles of HRQoL in any dimension had a reduction in their respective scores from pre- to post-intervention in both school groups. In conclusion, our results demonstrated no intervention effect on HRQoL dimensions and those students with the highest levels of HRQoL at baseline on all dimensions reduced from pre to post-intervention.Clinical Trial RegistrationThe trial is registered at the Clinical Trial Registry.

Este trabalho tem por objetivo discutir o processo de cooptação ideológica em Antonio Gramsci e Paulo Freire. Procuraremos ver nas ponderações sobre a contradição Estado/Sociedade civil e sua relevância na disputa da hegemonia de classe em Gramsci e contradição entre teorias de ação dialógica e anti-dialógica em Freire, a possível associação entre suas perspectivas pedagógicas e ideológicas. Para tanto, abordaremos a questão da educação em Freire e Gramsci no intuito de ver nas concepções de intelectual orgânico e do educador-educando dialógico aproximações entre os contrapontos desses autores à referidas contradições.

Este artigo aborda três dimensões pedagógicas do conceito de conscientização no pensamento de Paulo Freire. Procuramos investigar a relação entre a formação da consciência e a caracterização do sujeito em Freire, adentrando o sentido político do agir coletivo e a relevância da linguagem enquanto mediadora de práticas pedagógicas. Subsidiamos esta discussão com apontamentos de Freire e demais colaboradores, na esperança de contribuir para o aprofundamento deste conceito e de possíveis intersecções dele decorrentes. This article approaches three pedagogical dimensions of the concept of “conscientization” in Paulo Freire thought. We try to investigate the relation between the forming of conscience and the characterization of the subject in Freire, entering the political sense of collective acting and the relevance of language as a mediator of pedagogical practices. We subsidize this discussion with appointments from Freire and other collaborators, hoping to contribute to the deepening on this concept and its possible intersections that from it result