<![CDATA[Sport commitment is important for sustaining adolescents’ participation in organized sport, yet evidence concerning its psychological and interpersonal correlates remains limited in specialized sports-school settings. This study examined the relationships among sport motivation, exercise self-efficacy, perceived coach support, and sport commitment among adolescent student-athletes. A cross-sectional correlational design was conducted at SMP Khusus Olahraga Surakarta, Indonesia. All 189 registered student-athletes were invited through total population sampling; after 20 incomplete questionnaires were excluded, the final analytical sample comprised 169 participants. Sport motivation, exercise self-efficacy, perceived coach support, and sport commitment were assessed using the Sport Motivation Scale-II, Exercise Self-Efficacy Scale, Athletes’ Received Support Questionnaire, and Sport Commitment Questionnaire-2, respectively. Data were analyzed using Partial Least Squares Structural Equation Modeling with SmartPLS version 3. Sport motivation (β = .321), exercise self-efficacy (β = .239), and perceived coach support (β = .172) were positively associated with sport commitment. The relationships between sport motivation and perceived coach support (β = .171) and between exercise self-efficacy and perceived coach support (β = .123) were not statistically significant. A significant indirect association was found between sport motivation and sport commitment through perceived coach support (β = .029, 95% CI [.006, .058]); however, this finding does not establish causal mediation. Overall, the findings indicate that psychological resources and perceived interpersonal support are associated with sport commitment and provide context-specific evidence for understanding commitment among adolescent student-athletes in specialized sports schools.]]>
