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The aim of this study was to identify the prevalence and clustering of health-related behaviors in Spanish adolescents and to examine their association with sex, body mass index (BMI), different types of sedentary screen time, and adherence to 24-hour movement guidelines. A final sample of 173 students (M = 12.99 ± 0.51) participated in this study. Cluster analysis was conducted based on five health-related behaviors: PA and sedentary time derived from accelerometers, as well as healthy diet, sedentary screen time, and sleep duration derived from self-reported scales. Recommendations for 24-hour movement guidelines (i.e., physical activity (PA), screen time, and sleep duration) were analyzed both independently and combined. A total of 8.9% of the sample did not meet any of the guidelines, whereas 72.3%, 17.3%, and 1.7% of the sample met 1, 2, or all 3 guidelines, respectively. Six distinct profiles were identified, most of them showing the co-occurrence of healthy- and unhealthy-related behaviors. Given that most of the adolescents failed to meet the combination of PA, screen time, and sleep duration guidelines, these findings suggest the necessity to implement school-based interventions that target multiple health behaviors, especially because (un)healthy behaviors do not always cluster in the same direction.

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The aim was to examine the effects of a multicomponent school-based intervention on psychological correlates of physical activity (PA) in physical education (PE) and leisure-time PA settings. Two hundred and ten students (M=13.06±0.61) were assigned either to a control or an experimental school. Curricular and extracurricular PA actions were developed during one academic year to empower adolescents to be active by themselves. Experimental school students reported significant improvements in almost all psychological determinants and correlates of PA in PE and leisure-time PA settings, when compared to both control school students and their own baseline values. Results highlight the importance of developing multicomponent school-based interventions that involve the school community to improve students' motivational outcomes in PE and leisure-time PA contexts.

The role of task-and ego-oriented climates in explaining students' bright and dark motivational experiences in Physical Education Background: A distinction is made in Achievement Goal Theory (AGT) between taskoriented (i.e., effort, intra-individual progress, and self-comparison) and ego-oriented (i.e., inter-individual progress and normative comparison) climates. Combining insights from AGT and Self-Determination Theory (SDT), studies in the PE context have shown that a task-oriented climate positively relates to need satisfaction, although the findings regarding the motivating role of an ego-oriented climate are inconsistent. Moreover, little is known about the role of task-or ego-oriented climates in explaining experiences of basic psychological need frustration. Purpose: Grounded in AGT and SDT, the aim of the present study was to examine if experiences of basic psychological need satisfaction and need frustration can explain why task-and ego-oriented climates elicit positive and negative motivational outcomes in PE, respectively. Research design: Cross-sectional study. Method: A sample of 524 secondary school students (51.1% boys, Mage = 14.51; SD = 1.81) from five different secondary schools participated in this study. Students reported on their perceptions of task-and ego-oriented climates, motivational regulations, basic psychological need satisfaction, and need frustration, as well as positive and negative outcomes in PE. Structural equation modeling was used to investigate our objective. Results: We found that a task-oriented climate had a strong and positive relationship with basic psychological need satisfaction, eliciting a bright pathway to autonomous motivation and affective attitude. An ego-oriented climate was positively related to basic psychological need frustration, eliciting a dark pathway to amotivation and boredom. A negative cross-path from task-oriented climate to basic psychological need frustration was also found, while no significant cross-paths were found from egooriented climate to basic psychological need satisfaction. Conclusions: This study provides a better understanding of the mechanisms that explain why task-and ego-oriented climates shape students' motivational experiences in PE lessons. It is suggested that a task-oriented climate elicits a bright pathway towards more optimal functioning, because it fosters experiences of need satisfaction and buffers against experiences of need frustration. In contrast, an ego-oriented climate is primarily positively related to feelings of need frustration and negative motivational outcomes. Practical implications for PE teacher training are discussed.