“Development of a Heading Technique Training Model in Futsal Games for PJKR Students of the 2024 Class of Tadulako University, Palu” (2026) COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, 18(1), pp. 0979–0986. Available at: https://competitor.idjournal.eu/index.php/competitor/article/view/587 (Accessed: 22 February 2026).