Silva, André, Ana Costa, Cláudia Nunes, Pedro Rodrigues, and Raquel Maciel. “The Physical Activity, Self-Concept And Academic Performance Among Portuguese Adolescents”. PsychTech & Health Journal 1, no. 1 (September 7, 2017): 38-49. Accessed April 16, 2026. https://psychtech-journal.com/index.php/psychTech/article/view/76.