Trial reportAmerican journal of speech-language pathology2025
Effects of Respiratory Lung Volume Training on Speech Breathing, Voice, and Vocal Function: A Randomized Controlled Trial.
Trial report in American journal of speech-language pathology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
Abstract
purposeThe purpose of this randomized controlled trial was to determine the short- and long-term effects of Respiratory Lung Volume Training (RLVT) on speech breathing and voice in people with primary muscle tension dysphonia (pMTD).
methodTwenty-four participants with pMTD were randomized to either RLVT or control training (ConT) and completed six 1-hr training sessions. Increased lung volume initiations and terminations were targeted in RLVT using real-time visual biofeedback of lung volumes, whereas the ConT condition implemented a sham Expiratory Muscle Strength Trainer (placebo). Respiratory inductive plethysmography was used to measure speaking lung volumes before and after training. Voice and vocal function outcomes included acoustic measures, auditory-perceptual listener ratings, and self-ratings of speaking effort and impact of the voice disorder. Long-term follow-up assessments were completed for the RLVT condition.
resultsIncreases in lung volume initiation, termination, excursion, and amount of lung volume used per syllable were all significantly greater after RLVT than after ConT. All increases in respiratory outcome measures were maintained at 3 and 6 months posttraining except for lung volume excursion, which was significantly higher than baseline levels at 6 months but not 3 months posttraining. Acoustic and auditory-perceptual voice severity also showed significantly greater improvement after RLVT than after ConT with gains maintained for both follow-ups. Relative to vocal function, whereas speaking effort was significantly lower after RLVT than after ConT, both conditions produced similar and significant reductions in self-rated voice handicap. Improvements in these vocal function measures were maintained at long-term follow-up timepoints.
conclusionsSpeech breathing, voice, and speaking effort outcomes showed significantly greater improvement after RLVT than after ConT in this group of participants with pMTD, with improvement maintained at 6 months post-RLVT. The higher levels of lung volume targeted in RLVT may promote more efficient vocal behavior through functional and mechanical respiratory-laryngeal interactions while decreasing speaking effort.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.