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, Yuan-Ching, et al. “The Effects of Expiratory Muscle Strength Training on Voice and Associated Factors in Medical Professionals With Voice Disorders.” Journal of Voice, vol. 30, no. 6, Nov. 2016, p. 759.e21-759.e27. DOI.org (Crossref), doi:10.1016/j.jvoice.2015.09.012.