Psychophysical program based on the principles of taekwondo on aggressiveness in Colombian schoolchildren between 9 and 12 years. RevEncuent [Internet]. 2024 Jan. 23 [cited 2026 Sep. 25];22(01- Enero-Junio-):114-26. Available from: https://ojs.uac.edu.co/index.php/encuentros/article/view/3015