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ObjectiveThis study examines the mechanisms linking physical self-esteem to adolescents’ sports participation, emphasizing the mediating roles of exercise motivation and social support. It aims to establish a comprehensive framework that integrates psychological and social factors to understand sports behavior among adolescents.MethodA total of 2,588 adolescents from various regions in China were surveyed using validated scales for physical self-esteem, exercise motivation, social support, and sports participation. Structural equation modeling (SEM) was used to assess direct, mediated, and sequential mediation effects.ResultsThe analysis confirmed that physical self-esteem significantly predicts sports participation directly (β = 0.094, p ConclusionThis study underscores the critical roles of psychological traits and social contexts in shaping adolescents’ sports participation. By revealing the mediating and sequential mediation effects of exercise motivation and social support, the research highlights pathways for targeted interventions. Schools and communities should focus on enhancing physical self-esteem and fostering supportive social networks to encourage sports participation. Future studies should incorporate longitudinal designs and explore cultural and regional variations to extend these findings.