Campos, Francisco, Sixto González-Víllora, David González Gómez, and Fernando Manuel Lourenço Martins. “Benefits of 8-Week Fitness Programs on Health and Fitness Parameters (Beneficios De Los Programas De Fitness De Ocho Semanas En parámetros De Salud Y Fitness)”. Retos 35 (January 1, 2019): 224–228. Accessed September 7, 2025. http://www.revistaretos.org/index.php/retos/article/view/63889.