Intra-pair comparison among twins, physical self-esteem, and motivation for exercise and physical education in adolescence: a cross-sectional study. Global Journal of Sport and Exercise Science (GJSES), [S. l.], v. 2, n. 1, 2026. DOI: 10.63750/r8wc6y67. Disponível em: https://gjses.org/index.php/gjses/article/view/41. Acesso em: 30 may. 2026.