SANTILLAN CHILLAMBO, Dicson Xavier; ANGULO CAICEDO, Ramón Alonso. Impact Assessment of a Functional Training Program on Upper Body Strength and Performance of Under-15 Youth Goalkeepers: A Quasi-Experimental Study in Esmeraldas . EKSIGMA Ecuadorian Journal of Scientific Knowledge, [S. l.], v. 2, n. 1, p. 82–98, 2026. Disponível em: https://eksigma.com/index.php/principal/article/view/20. Acesso em: 16 apr. 2026.