"Effects of EMST and Triflo on Voice Parameters and Vocal Fatigue"

A healthy voice is essential for meeting professional and communicative demands, particularly for professional voice users such as academics, who are at increased risk of voice disorders due to prolonged and intensive voice use, unfavorable acoustic conditions, and stress. Voice disorders often result from inadequate respiratory support, leading to compensatory laryngeal overuse, vocal fatigue, and deterioration in voice quality. Although traditional voice therapy emphasizes diaphragmatic breathing, it does not enhance respiratory capacity because it lacks resistance. This study aims to investigate the effects of resistance-based breathing exercises using the Expiratory Muscle Strength Trainer (EMST 150) and triflo devices on respiratory capacity, acoustic and aerodynamic voice parameters, and vocal fatigue in academics. The findings are expected to contribute to the literature and support the use of EMST as a preventive and therapeutic approach for occupational groups at risk of voice disorders.

NCT Number	NCT07371351
Lead Sponsor	Medipol University
Conditions	Voice Fatigue, Voice Disorder, Academic Voice Use and Voice Fatigue, Academician's Risk of Developing Voice Disorder, Voice Disorder Prevention in Academics
Enrollment	40 participants
Start Date	2026-01-10
Primary Completion	2026-04-30 (estimated)
Study Completion	2026-05-10 (estimated)
Updated on ClinicalTrials.gov	2026-01-27