Journal of voice : official journal of the Voice Foundation · 2026
Immediate Effects of Eight Electrotherapy Protocols Associated with Vocal Exercises in Dysphonic Women: Preliminary Results of a Clinical Study.
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Siqueira Larissa Thaís Donalonso, Nicacio Ana Paula Sousa Fernandes, da Silva Caio Mateus, de Araújo Felipe Silva, Souza Iza Marianna de Castro, Silverio Kelly Cristina Alves, Godoy Juliana Fernandes
Аннотация
OBJECTIVE: To compare the immediate effects of eight electrotherapy therapeutic conditions on self-perceived musculoskeletal pain and vocal quality in women with behavioral dysphonia.
METHODS: This preliminary clinical study was conducted within a speech-language pathology clinical context using a randomized crossover design. Ten adult women with behavioral dysphonia participated and underwent eight electrotherapy sessions, each lasting 20 minutes with a one-week interval between sessions: low-frequency transcutaneous electrical nerve stimulation (TENS), high-frequency TENS, burst modulated medium-frequency alternating current, and a sham condition. These same modalities were also performed concomitantly with vocal exercises. Regarding outcomes, self-assessment protocols addressing musculoskeletal pain intensity, vocal comfort, and vocal quality were administered before and after each intervention; acoustic parameters were also extracted, including fundamental frequency, the acoustic voice quality index, and the acoustic breathiness index.
RESULTS: There was a reduction in musculoskeletal pain in the shoulder, upper back, laryngeal, and anterior neck regions after all electrotherapy modalities, with or without concomitant exercise, with no differences between groups. Across all electrotherapy conditions, participants reported improvements in vocal comfort and vocal quality. No differences were found in acoustic parameters after any of the electrotherapy modalities.
CONCLUSION: The findings suggest that different electrotherapy modalities, whether applied alone or combined with vocal exercises, produce similar immediate effects on musculoskeletal pain relief and vocal perception, but do not modify acoustic parameters in the short term. As similar responses were also observed in sham conditions, these effects were likely related to non-specific or expectancy factors rather than to active electrotherapy effects. These findings reinforce the need for further longitudinal investigations.
METHODS: This preliminary clinical study was conducted within a speech-language pathology clinical context using a randomized crossover design. Ten adult women with behavioral dysphonia participated and underwent eight electrotherapy sessions, each lasting 20 minutes with a one-week interval between sessions: low-frequency transcutaneous electrical nerve stimulation (TENS), high-frequency TENS, burst modulated medium-frequency alternating current, and a sham condition. These same modalities were also performed concomitantly with vocal exercises. Regarding outcomes, self-assessment protocols addressing musculoskeletal pain intensity, vocal comfort, and vocal quality were administered before and after each intervention; acoustic parameters were also extracted, including fundamental frequency, the acoustic voice quality index, and the acoustic breathiness index.
RESULTS: There was a reduction in musculoskeletal pain in the shoulder, upper back, laryngeal, and anterior neck regions after all electrotherapy modalities, with or without concomitant exercise, with no differences between groups. Across all electrotherapy conditions, participants reported improvements in vocal comfort and vocal quality. No differences were found in acoustic parameters after any of the electrotherapy modalities.
CONCLUSION: The findings suggest that different electrotherapy modalities, whether applied alone or combined with vocal exercises, produce similar immediate effects on musculoskeletal pain relief and vocal perception, but do not modify acoustic parameters in the short term. As similar responses were also observed in sham conditions, these effects were likely related to non-specific or expectancy factors rather than to active electrotherapy effects. These findings reinforce the need for further longitudinal investigations.