THE EFFECT OF DRILL VARIATIONS TRAINING ON THE OVERHAND SERVE DEFENSE ABILITY IN VOLLEYBALL AT SMA HANG TUAH 1 SURABAYA. Journal Sports Exercise Science International (SESI), [S. l.], v. 1, n. 1, p. 60–63, 2025. Disponível em: https://sesi.karirpublisher.org/index.php/sesi/article/view/19. Acesso em: 22 feb. 2026.