Social support and physical activity in adolescents. Analysis of mediating effect of self-efficacy and perceived barriers to its practice. European Journal of Health Research, [S. l.], v. 5, n. 2, p. 99–108, 2019. DOI: 10.30552/ejhr.v5i2.181. Disponível em: https://revistas.uautonoma.cl/index.php/ejhr/article/view/1290. Acesso em: 27 jun. 2026.