Faridah, E. et al. 2024. 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. 59, (Oct. 2024), 595–601. DOI:https://doi.org/10.47197/retos.v59.107464.