Sport participation is especially important for patients with asthma in that it decreases psychosocial and physiological problems associated with inactivity. However, adolescents with asthma seem to participate less in sports compared to their non-asthmatic peers. The current study tested the direct associations between maternal sport-specific factors and sport club participation of early adolescents with asthma and the indirect effect through adolescent's sport-specific cognitions. METHODS: During home visits, 261 adolescents (aged 10-15) completed questionnaires about self-efficacy, beliefs regarding sport participation, and their actual sport club participation. Their mothers reported their sport-specific support, beliefs about offspring's and own sport participation, their own levels of physical activity, and their self-efficacy to stimulate offspring to participate in sports. Path analyses were used to examine the direct and indirect associations of maternal sport-specific factors with adolescents sport club participation via adolescent sport-specific cognitions. RESULTS: Analyses showed that maternal sport-specific support (β=n0.20, Pn=n0.007) and self-efficacy to stimulate offspring to participate in sports (β=n0.20, Pn=n0.027) related positively to adolescents' sport club participation. Adolescents' self-efficacy (indirect effectn=n0.09, SEn=n3.01, Pn