Mindfulness-Acceptance-Commitment Intervention Effects on Athletic Performance, Passion, and Psychological Well-being in Competitive Tennis Players: A Randomized Controlled Trial. - Abidi, Wafa; Fall, Estelle; Chalghaf, Nasr; Ceylan, Halil İbrahim; Muntean, Raul Ioan; Dergaa, Ismail; Candar, Reyhan; Özdemir, Kübra; Çingöz, Yunus Emre; Man, Cristina Maria; Jarraya, Mohamed (Balneo & PRM Research Journal, 2026)