Faridah E, Kasih I, Nugroho S, et al. Article RETRACTED due to manipulation by the authors Eficacia del desarrollo de medios m-gym en el aprendizaje de la gimnasia rítmica para estudiantes y profesores en Indonesia (Effectiveness of m-gym media development in learning rhythmic gymnastics for students and lecturers in Indonesia): Article RETRACTED due to manipulation by the authors. Retos. 2024;59:595-601. doi:10.47197/retos.v59.107464