Effects of a Four-Week Combined Respiratory Muscle Training and Breathing Exercise Program on Breath-Holding Time, Functional Performance, Sleep Quality, and Perceived Stress in Healthy University Students. - Alonazi, Asma; Almasoudi, Lena; Almzini, Najd; Alzakari, Najla; Almutairi, Renad; Alhassan, Saud; Albosager, Ahmed; Alsaeed, Qasem; Alojayan, Ali; Alismail, Abdullah (Journal of Clinical Medicine, 2026)