Twenty-nine participants with voice disorders who are working in a hospital and who are using their voice for more than 4 hours per day were recruited.
- Study group: EMST 3 days per week and involved performing 25 expiratory exercises (five cycles, each comprising five breaths) for 5 weeks
- Control group: NO intervention
- All participants underwent aerodynamics analysis, pulmonary function, MEP (Maximum Expiratory Pressure), and completed a vocal symptoms questionnaire before and after
- The voiceless /S/ expiratory time, symptom questionnaire scores, and MEP were greater in the Study group over the Control group
Tsai YC, Huang S, Che WC, Huang YC, Liou TH, Kuo YC. The Effects of Expiratory Muscle Strength Training on Voice and Associated Factors in Medical Professionals With Voice Disorders. J Voice. 2015 Nov 10. pii: S0892-1997(15)00212-X. doi: 10.1016/j.jvoice.2015.09.012.