76893 20210121114542.0 sideral 93059 ART-2015-93059 eng (orcid)0000-0002-9208-4824 Abarca-Sos, Alberto Universidad de Zaragoza Application of stages of change model to adolescents' physical activity in relation to psychological variables 2015 Access copy available to the general public Unrestricted AIM: This study investigated the stages of change in physical activity in relation to psychological variables: self-efficacy, physical self-concept and barriers to physical activity, as well as gender. Furthermore, cluster profiles were created based on psychological variables to be compared with stages of change groups. METHODS: Data were obtained from a representative sample of adolescents (N.=1618, 14.46±1.28 years) from Aragon region (Spain). The different strata were selected according to the geographical region, environment, type of school, age and gender. RESULTS: Males (75.5%) and very active adolescents (96.9% participant boys and 93.5% participants girls) were more prevalent in the action and maintenance groups. We found significant differences in psychosocial variables by stages of change and gender, showing higher scores in active groups for physical self-concept (effects of gender and stages of change: F(1, 1618)=313.82 P<0.001, ¿²=0.230) and self-efficacy (F(1, 1618)=324.34 P<0.001, ¿²=0.236), and lower scores in passive groups for intrapersonal (F(1, 1618)=179.73 P<0.001, ¿²=0.146) and extrapersonal barriers (F(1, 1618)=189.42 P<0.001, ¿²=0.153). Psychological cluster profiles created with these variables showed significant relationships with stages of change groups (¿²(1)=162,76, P<0.001; Pearson R=0.359 P<0.001). CONCLUSION: The findings of the research suggest the importance of the study, showing strong determinants of PA, physical self-concept, self-efficacy and perceived barriers, in relation to the intention to change behaviour, not only stage of change model variables. Furthermore, the study can be relevant to designing more effective health promotion programmes in the adolescent population. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.111 2015 SPORT SCIENCES 57 / 82 = 0.695 2015 Q3 T3 0.512 2015 Orthopedics and Sports Medicine 2015 Q2 Physical Therapy, Sports Therapy and Rehabilitation 2015 Q2 Sports Science 2015 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Bois, J.E. (orcid)0000-0002-4269-9580 Generelo Lanaspa, Eduardo Universidad de Zaragoza (orcid)0000-0002-7076-6621 Julian Clemente, J.A. Universidad de Zaragoza (orcid)0000-0002-9761-1953 Zaragoza Casterad, Javier Universidad de Zaragoza 3001 187 Universidad de Zaragoza Dpto. Expres.Music.Plást.Corp. Área Didáctica Expres.Corporal 55, 11 (2015), 1397-1406 J. Sports Med. Phys. Fitness The Journal of sports medicine and physical fitness 1827-1928 487489 http://zaguan.unizar.es/record/76893/files/texto_completo.pdf Postprint 66774 http://zaguan.unizar.es/record/76893/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:76893 articulos driver 2021-01-21-11:16:59 ARTICLE