Ardian, R. (2024) “Article RETRACTED due to manipulation by the authors Aplicación de Métodos de Entrenamiento en Circuito para Mejorar la Condición Física del VO2max: Un Estudio Experimental en Atletas de Balonmano (Application of Circuit Training Methods to Improve VO2max Physical Condition: An Experimental Study on Handball Athletes): Article RETRACTED due to manipulation by the authors”, Retos, 54, pp. 660–666. doi:10.47197/retos.v54.103377.