THE EFFECTS OF HIGH-INTENSITY INTERVAL TRAINING (HIIT) ON YOUTH FITNESS IN EUROPEAN SCHOOLS. World Bulletin of Physical Education and Sports Science, [S. l.], v. 1, n. 1, p. 14–18, 2025. Disponível em: https://worldbulletin.org/index.php/2/article/view/9. Acesso em: 12 nov. 2025.