Redução da autopercepção de esforço vocal em um grupo de mulheres sem queixas vocais após fotobiomodulação: uma comunicação breve
Reduction in self-perceived vocal effort after photobiomodulation in a group of women without vocal problems: a brief communication
Rafaela Lombas de Resende; Maria Vitória Leão Ferreira; Beatriz dos Anjos Bergamasco; Ana Carolina Constantini
Resumo
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Abstract
Purpose: To present initial results of an ongoing research about the effects of photobiomodulation (PBM) and inactive laser (placebo) on self-perception of vocal effort in women without voice complaints.
Methods: The participants were randomly divided in two groups: CG (Control Group - inactive laser); EG (Experimental Group - application of 9J per point of low-intensity laser in infrared wavelength). Vocal samples were recorded according to the CAPE-V protocol, numbers (1-20) and months of the year. During these tasks, the participants were guided to realize their self-perception of vocal effort, that was measured using the Borg CR10-BR Scale adapted for vocal effort applied before and after each intervention. Descriptive and inferential statistics were performed. The Shapiro-Wilk test didn't confirm the normality of the data, so the Wilcoxon test was used for intra and inter group comparisons (p-value<0.05).
Results: The total sample was composed of 20 women (18-45 years old), without voice complaints, with mean age of 28,6 years (SD=6,71) in the CG and 27,1 (SD=6,57) in the EG. CG showed a significant mean reduction in BORG scale scores (p=0.031) between pre and post intervention, as did EG (p=0.020). There was no statistically significant difference in the comparison between the two groups.
Conclusion: There was a general reduction in the self-perceived vocal effort in the pre and post intervention for both groups. A placebo effect was observed in the CG. No one reported a worsening of self-perceived vocal effort after PBM.
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References
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Submitted date:
02/13/2025
Accepted date:
05/05/2025
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