<![CDATA[Indonesian students living abroad face the challenge of developing global competence while maintaining a strong sense of Indonesian national identity. Sekolah Indonesia Kuala Lumpur provides a strategic educational setting for strengthening nationalism through participatory and culturally relevant learning experiences. This community service program aimed to strengthen nationalism among Indonesian students through psychosocial-based physical activity education. The program employed a participatory educational approach that integrated an interactive seminar, collaborative physical activities, reflective discussions, and program evaluation involving students, teachers, and educational staff. A total of 138 students completed a post-program questionnaire using a five-point Likert scale. The student questionnaire demonstrated excellent internal consistency, with a Cronbach’s alpha coefficient of 0.902. Data were analyzed using descriptive statistics, including frequency, percentage, mean, and standard deviation, supported by qualitative interpretations of observations and participant discussions. The findings showed that students had positive perceptions of the program, with mean scores ranging from 4.15 to 4.32. The highest score was recorded for pride in being an Indonesian student. Participants also recognized the benefits of physical activity for health, cooperation, discipline, social interaction, and cultural preservation. Teachers and educational staff considered the program relevant to character education and national identity development in a multicultural school environment. These findings indicate that psychosocial-based physical activity can serve as an innovative community service strategy for strengthening nationalism, social cohesion, character education, and healthy lifestyles among Indonesian students in overseas schools.]]>
