Integrated training through small-sided games: effects on football players' tactical engagement. A systematic review. - Essafi, Samir; Brouki, Younes; El Machrouh, Youssef; Khali, Chaimae; Barkaoui, Mohamed; Eloirdi, Aziz; Chokri, Aziz (Retos: Nuevas Perspectivas de Educación Física, Deporte y Recreación, 2026)