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  • Title: Recovery From Heavy Vocal Loading in Women With Different Degrees of Functional Voice Problems.
    Author: Whitling S, Lyberg-Åhlander V, Rydell R.
    Journal: J Voice; 2017 Sep; 31(5):645.e1-645.e14. PubMed ID: 28572014.
    Abstract:
    TYPE OF STUDY: This is a longitudinal, case-control clinical trial. OBJECTIVES: This study aims to track recovery time following a vocal loading task (VLT) imposing vocal fatigue and to explore if patients with functional dysphonia (FD) are worse affected by vocal loading, and if these patients take longer than others to recover. METHODS: Fifty (n = 50) female participants in four vocal subgroups on a spectrum of everyday vocal loading and functional voice complaints, including n = 20 patients with FD, took part in a clinical VLT, inflicting vocal fatigue through loud speech in ambient noise. Short-term recovery was explored through self-assessment of unspecified voice problems every 15 minutes for 2 hours following loading. Long-term recovery was tracked through self-assessments of specific voice symptoms during 3 days following vocal loading. Effects of heavy vocal loading were evaluated through voice recordings, long-time-average spectrum, perceptual assessments, and assessments of digital imaging performed pre- and post vocal loading. RESULTS: Patients with FD did not return to baseline for unspecified voice problems within 2 hours of vocal loading and were worse affected by vocal loading than other groups. Women with high everyday vocal loading with no voice complaints identified vocal loading more evidently than other groups. Long-term recovery took 7-20 hours for all groups. CONCLUSIONS: Short-term recovery is slower for patients with FD and these patients are worse affected by a VLT than others.
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