The Effect of Interval Training on 30 Meters Sprint Running Speed ​​in Elementary School Students. Journal Coaching Education Sports, [S. l.], v. 7, n. 1, p. 153–161, 2026. DOI: 10.31599/gkk7e146. Disponível em: https://ejurnal.ubharajaya.ac.id/index.php/JCESPORTS/article/view/5408.. Acesso em: 18 may. 2026.