Immediate effect of inspiratory exercise with exerciser and respiratory encourager in women without vocal complaints.
Alessandra Thais Beraldo, Julia Batistella, Perla do Nascimento Martins and 2 others
PMID 38775526WHAT IT FOUND
A single inspiratory exercise session increased maximum phonation time for the /s/ sound but produced no immediate changes in vocal quality or acoustic measures.
It does not serve as a vocal warm-up for improving voice stability.
Key findings
01There was a significant difference in maximum phonation time for the /s/ sound before and after the exercise.
02No differences were found in auditory-perceptual judgment or acoustic voice analysis before and after the exercise.
03The exercise should not be used with the aim of achieving immediate changes in vocal quality, such as in vocal warm-up programs.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study included only women, so results may not apply to men. It measured only immediate effects, so it cannot determine if longer-term training improves voice. Participants did not self-assess their voice, so subjective improvements were not captured. The sample consisted of healthy undergraduate students, which limits generalisability to patients with voice disorders.
The easy way to misread this
Do not interpret the improved /s/ phonation time as evidence of better voice production. The /s/ sound is voiceless and does not involve vocal fold vibration, so this finding reflects respiratory control rather than vocal quality, which did not change.