The Effect of Meditation Training on Increasing Concentration in Indonesian Kempo Federation Athletes at Graha BSS Narmada. Jurnal, Pendidikan [Internet]. 2025 Dec. 30 [cited 2026 Jun. 15];10(4):1766-73. Available from: https://ejournal.mandalanursa.org/index.php/JUPE/article/view/10130