Manalu RBB, Simbolon GA, Damayanti EC, Panjaitan R, Ritonga DFB. The Effect of Physical Fitness Training on the Health and Learning Concentration of Elementary School Students. JPMSM [Internet]. 2026 Jun. 27 [cited 2026 Sep. 9];2(06):479-85. Available from: https://ejournal.pustakakaryamandiri.com/ojs/index.php/jpmsm/article/view/527