“THE EFFECT OF RESISTANCE BAND TRAINING ON IMPROVING OVERHEAD VOLLEYBALL SERVE SKILLS IN THE EXTRACURRICULAR PROGRAM AT SDN BANGSRI SUKODONO”. Journal Sports Exercise Science International (SESI), vol. 1, no. 1, Dec. 2025, pp. 19-27, https://sesi.karirpublisher.org/index.php/sesi/article/view/16.