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The Influence of Mental Toughness and Learning Motivation on Student Activeness in Physical Education Learning in Elementary Schools: Literature Review. Compet. J. Pendidik. Kepelatihan Olahraga [Internet]. 2026 Feb. 20 [cited 2026 Feb. 21];18(1):1152-64. Available from: https://competitor.idjournal.eu/index.php/competitor/article/view/622