Campos, Francisco, Fernando Martins, and Ricardo Gomes. “La Imagen Del Instructor De Actividades De Grupo De Fitness (The Image of the Group Exercise Fitness Instructor)”. Retos 49 (June 28, 2023): 525–531. Accessed June 10, 2026. https://www.revistaretos.org/index.php/retos/article/view/98954.