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accuracy is a very important factor in badminton, especially in services, accuracy plays an important role in the determination of the success of a service. The purpose of this study was to determine the effect of mental training methods (internal and external imagery) and concentration on the accuracy of short service backhand. This research made use of experimental method through the application of 2x2 factorial design. The population in this study were 45 athletes of student activity unit (UKM) Yogyakarta State University (UNY). Purposive sampling technique was employed in this study and 24 people participated. Concentration test with grid concentration test were used as research instrument in this study. The result revealed that internal imagery mental training method was more significant at improving short service backhand rather than external imagery mental training method. Keywords—accuracy, concentration, imagery

proceedings of the 2nd yogyakarta international seminar on health, physical education, and sport science (yishpess 2018) and 1st conference on interdisciplinary approach in sports (cois 2018)

Influence of Training Method and Concentration to the Accuracy of Short Service Backhand in Badminton