Clinical trial NCT02102399: Vocal Warm-up and Respiratory Muscle Training
Official title: Vocal Warm-up and Respiratory Training in Teachers: a Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Voice Disorders
Keywords: Voice training
Education
Voice
Faculty
Lead sponsor: Federal University of Bahia
Sponsor class: OTHER
Collaborators: name: Bahia State Secretariat of Education, Brazil
First posted: 2014-04-02
Enrollment: 41
Sex: ALL
Minimum age (years): 20
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The purpose of this study is to verify the effects of two speech-pathology interventions: vocal warm-up and respiratory training in teachers who work in a public school of the city of Salvador-Bahia, with or without complaints of vocal disorders. It is a preventive study and the hypothesis is that both approaches can produce positive voice changes, but the Vocal Warm-up will produce the most significant changes.

Detailed description: Randomized Clinical Trial where participants were allocated into groups: Vocal Warm-up (to perform exercises of resistance and flexibility for 13 minutes before teaching, during six weeks) and Respiratory Muscle Training (to perform exercises to strengthen the respiratory muscles through the use of incentive respiratory equipment. Five repetitions of exhales with an interval of thirty seconds between each one were performed. It was requested rest for two minutes, repeating the procedure four times with the total of five series. These exercises were performed for 13 minutes before teaching, during six weeks).

Outcomes analyzed: demographics and teaching activity characteristics; symptoms, habits and factors associated with voice disorders; self-reported voice handicap (Voice Handicap Index-VHI-10); vocal severity rating (Vocal Severity Scale); and acoustic parameters through the computerized acoustic voice analysis program VoxMetria (CTS Informatics).

Eligibility criteria: Inclusion Criteria:

* Age between 20-60.
* No occurence of speech therapy simultaneously to the intervention

Exclusion Criteria:

* Professional voice use in another activity;
* Frequent use of alcohol and tobacco;
* Influenza and/or upper respiratory tract infections (eg, rhinitis, sinusitis, pharyngitis) during the period of participation in the research.

Primary outcomes:
measure: Voice Handicap Index (VHI-10)
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Fundamental Frequency)
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Jitter)
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Shimmer)
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Noise)
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (GNE)
timeFrame: Baseline, 6 weeks
measure: Voice Handicap Index (VHI-10) 2
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Fundamental Frequency) 2
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Jitter) 2
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Shimmer) 2
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (Noise) 2
timeFrame: Baseline, 6 weeks
measure: Acoustic Analysis (GNE) 2
timeFrame: Baseline, 6 weeks
measure: Change in Voice Handicap Index (VHI-10)
timeFrame: Baseline, 6 weeks
measure: Change in Fundamental Frequency
timeFrame: Baseline, 6 weeks
measure: Change in Jitter
timeFrame: Baseline, 6 weeks
measure: Change in Shimmer
timeFrame: Baseline, 6 weeks
measure: Change in Noise
timeFrame: Baseline, 6 weeks
measure: Change in GNE
timeFrame: Baseline, 6 weeks
Secondary outcomes:
measure: Post-treatment Questionnaire (Voice Symptoms Improvement)
timeFrame: After 6 weeks of intervention
measure: Post-treatment Questionnaire (Voice Clearer)
timeFrame: After 6 weeks of intervention
measure: Post-treatment Questionnaire (Easier to Talk)
timeFrame: After 6 weeks of intervention
measure: Post-treatment Questionnaire (Compliance With Intervention)
timeFrame: After 6 weeks of intervention
Other outcomes:
Locations:
city: Salvador
country: Brazil
facility: Federal University of Bahia
state: Bahia
Study officials:
affiliation: Federal University of Bahia
name: Maria Lucia V Masson, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Federal University of Bahia
name: Lilian Paternostro, MS
role: STUDY_CHAIR
affiliation: Federal University of Bahia
name: Fernando M Carvalho, PhD
role: STUDY_DIRECTOR
References:
citation: Pereira LP, Masson ML, Carvalho FM. Vocal warm-up and breathing training for teachers: randomized clinical trial. Rev Saude Publica. 2015;49:67. doi: 10.1590/S0034-8910.2015049005716. Epub 2015 Oct 9.