The effect of small-sided games and HIIT formats and competitive level on enjoyment and exercise intensity in young adult male soccer players. - Xu, Weiqiang; Trybulski, Robert; Silva, Rui Miguel; Zhao, Yichen; de Oliveira Castro, Henrique; De Conti Teixeira Costa, Gustavo; Clemente, Filipe Manuel (Biology of Sport, 2025)