Socio-emotional learning (SEL) integrated into physical education (PE) curricula significantly contributes to student well-being, primarily through enhanced emotional regulation, with the positive impact further amplified by supportive school climates. This finding, derived from a comprehensive study involving 452 high school students across three provinces in China, highlights the critical role of intrapersonal skills in navigating the emotionally charged environment of physical activity and physical education classes. The research, employing a multilevel moderated mediation model, suggests that while SEL equips students with valuable competencies, the effectiveness of these skills in fostering well-being is contingent upon both the individual’s capacity for emotional self-management and the broader institutional support provided by the school. The study, published in Frontiers in Psychology, offers a nuanced understanding of how SEL translates into tangible benefits for adolescent mental health, moving beyond generalized assumptions about its impact. By focusing on physical education, a subject often evaluated primarily on physical development, the research underscores its potential as a fertile ground for cultivating essential socio-emotional skills. The findings are particularly relevant in the current educational landscape, where the emphasis on holistic student development and mental health support is increasingly paramount. The Crucial Role of Emotional Regulation At the core of the study’s findings is the robust mediation of student well-being by emotional regulation. The research indicates that students who engage in SEL within their PE classes demonstrate improved abilities to manage their emotions. This enhanced capacity for emotional regulation, in turn, positively influences their overall mental well-being. This pathway is significant because physical education often involves situations that can evoke strong emotional responses, such as competition, team dynamics, success, and failure. Students equipped with effective emotional regulation skills are better positioned to navigate these challenges without compromising their psychological health. The study’s data revealed a significant indirect effect of SEL on well-being via emotional regulation, with a confidence interval that does not include zero, confirming its mediating role. This suggests that as students develop self-awareness, self-management, and responsible decision-making skills through SEL in PE, they become more adept at regulating their emotions. This enhanced emotional control is then directly linked to higher levels of student well-being, characterized by emotional balance, resilience, and adaptive coping mechanisms. Peer Relationships: A Less Direct Influence In contrast to emotional regulation, the study found that peer relationship quality did not serve as a significant mediator between SEL in PE and student well-being. While SEL programs often aim to foster better social skills and stronger peer connections, the findings suggest that in the context of PE, the impact of SEL on well-being is less directly channeled through improved peer relationships. This does not negate the importance of social skills but highlights that the immediate psychological benefits of SEL in this specific environment might be more strongly linked to intrapersonal regulation. The researchers theorize that in collectivist cultures like China, where the study was conducted, peer dynamics can be complex, influenced by academic pressures and social comparisons. This might temper the direct translation of SEL-enhanced social skills into robust well-being benefits through peer support alone. Furthermore, adolescent development itself is a period where intrapersonal skills are foundational, and their development might precede or overshadow the direct impact of peer relationships on well-being in certain contexts. School Climate: The Amplifier of SEL’s Impact A significant contribution of this research is the identification of school climate as a crucial moderator. The study found that the indirect effect of SEL on well-being through emotional regulation is significantly stronger in schools with more supportive and positive climates. This suggests that the broader school environment acts as a vital contextual factor that can either enhance or diminish the effectiveness of SEL initiatives. A positive school climate, characterized by emotional safety, supportive teacher-student relationships, and respectful peer interactions, creates an optimal environment for students to practice and benefit from SEL competencies. In such settings, students may feel more secure in expressing their emotions and practicing regulation strategies, thus amplifying the positive link between SEL and well-being. Conversely, in less supportive environments, the development and application of these skills might be hindered. The study’s multilevel analysis, which accounts for both individual student experiences and school-level characteristics, revealed that the interaction between emotional regulation and school climate was statistically significant. This indicates that the pathway from SEL to well-being via emotional regulation is not uniform across all schools but is contingent upon the prevailing school environment. This finding is particularly pertinent for educational policymakers and school administrators, emphasizing that investing in a positive school climate is as crucial as implementing SEL programs themselves. Methodological Rigor and Theoretical Grounding The study’s robust methodology lends credibility to its findings. Data were collected from 452 high school students across three diverse provinces in China using validated self-report measures. The use of Confirmatory Factor Analysis (CFA) established the construct validity of the measures, ensuring that the study accurately assessed the intended variables. Subsequently, multilevel path modeling was employed to test the complex moderated mediation model, accounting for the nested nature of students within schools. The theoretical underpinnings of the study are also noteworthy, drawing from the CASEL framework for SEL competencies, Self-Determination Theory (SDT) to explain psychological needs fulfillment, and Ecological Systems Theory to understand the influence of environmental contexts. This multidisciplinary approach provides a comprehensive framework for understanding the intricate relationships between SEL, emotional regulation, peer relationships, school climate, and student well-being. Implications for Educational Practice and Policy The findings of this research carry significant implications for how schools approach student well-being and SEL integration. Prioritizing SEL in PE: The study strongly advocates for the intentional integration of SEL into physical education curricula. PE teachers can be trained to incorporate explicit SEL activities, such as mindfulness exercises, emotion-labeling discussions, and reflective practices, into their lesson plans. This could transform PE from a purely physical domain into a holistic developmental space. Focus on Emotional Regulation: Given its central role as a mediator, educational interventions should place a strong emphasis on developing students’ emotional regulation skills. This could involve teaching strategies for managing frustration, anxiety, and excitement, as well as fostering emotional awareness and expression in constructive ways. Cultivating Supportive School Climates: The moderating role of school climate underscores the importance of creating environments where students feel safe, supported, and respected. This requires a whole-school approach involving all stakeholders, from administrators and teachers to support staff and students, in fostering positive interpersonal dynamics and a sense of belonging. Teacher Training and Development: PE teachers are in a unique position to influence students’ socio-emotional development. Providing them with professional development opportunities focused on SEL pedagogy and strategies for fostering emotional regulation in active settings is crucial. Differentiated Approach to Social Skills: While social skills are important, the findings suggest that their direct impact on well-being might be less pronounced than emotional regulation in PE contexts. Therefore, while continuing to promote positive peer interactions, schools should ensure that SEL efforts also strongly target intrapersonal competencies. Future Directions and Research Gaps Despite its valuable contributions, the study acknowledges certain limitations. The cross-sectional nature of the data means that causal relationships cannot be definitively established. Future longitudinal studies are needed to track the development of these relationships over time and experimental designs could further elucidate causal pathways. Additionally, the reliance on self-report measures, while common in social science research, could be complemented by multi-source data (e.g., teacher or peer reports) to provide a more comprehensive picture and mitigate potential biases. Furthermore, while school climate was examined as a moderator, future research could delve deeper into specific aspects of PE environments, such as instructional practices, teacher feedback styles, and the nature of competitive structures, to understand how these PE-specific factors interact with SEL and student well-being. Investigating these nuances could lead to even more targeted and effective interventions within physical education. In conclusion, this research provides compelling evidence that socio-emotional learning within the physical education curriculum is a potent tool for enhancing student well-being, primarily by bolstering emotional regulation. The findings highlight the symbiotic relationship between individual competencies and the broader school environment, emphasizing that supportive climates are instrumental in unlocking the full potential of SEL. As educational institutions worldwide continue to prioritize mental health and holistic development, the insights from this study offer a clear roadmap for leveraging physical education as a key domain for cultivating resilient, emotionally intelligent, and well-adjusted young individuals. Post navigation Enhancing Student Creativity in AIGC Design Education: The Mediating Role of Learning Motivation in Reverse Engineering Pedagogy