Vocal performance of group fitness instructors before and after instruction: changes in acoustic measures and self-ratings

Dallaston, Katherine and Rumbach, Anna (2015) Vocal performance of group fitness instructors before and after instruction: changes in acoustic measures and self-ratings. Journal of Voice, 30 1: 127.e1-127.e8. doi:10.1016/j.jvoice.2015.02.007


Author Dallaston, Katherine
Rumbach, Anna
Title Vocal performance of group fitness instructors before and after instruction: changes in acoustic measures and self-ratings
Journal name Journal of Voice   Check publisher's open access policy
ISSN 0892-1997
1873-4588
Publication date 2015-03-17
Sub-type Article (original research)
DOI 10.1016/j.jvoice.2015.02.007
Volume 30
Issue 1
Start page 127.e1
End page 127.e8
Total pages 8
Place of publication Philadelphia, PA United States
Publisher Mosby
Collection year 2016
Language eng
Formatted abstract
Objectives

(1) To quantify acute changes in acoustic parameters of the voices of group fitness instructors (GFIs) before and after exercise instruction. (2) To determine whether these changes are discernible perceptually by the instructor.

Study Design

This is a pilot prospective cohort study.

Methods

Participants were six female GFIs, based in Brisbane, Australia. Participants performed a series of vocal tasks before and after instruction of a 60-minute exercise class. Data were obtained pertaining to fundamental frequency (pitch), intensity (volume), jitter, shimmer, harmonic-to-noise ratio (HNR), maximum duration of sustained phonation (MDSP), and pitch range. Additionally, self-ratings of voice quality were obtained before and after instruction. Data were analyzed using the Wilcoxon signed rank test.

Results

Significant increases (P ≤ 0.05) were found in fundamental frequency and intensity after instruction. No significant changes in jitter, shimmer, HNR, or MDSP were found before and after instruction. For the group, no significant change in self-ratings of voice quality occurred before and after instruction.

Conclusions

Statistically significant changes in pitch and volume were found on acoustic analysis. However, these subtle changes remained within the limits of what is considered normal and representative of the participant's age and gender. Further research into the effects of exercise instruction on the voice is needed.
Keyword Professional voice use
Aerobics instructor
Group fitness instructor
Vocal loading
Voice disorder
Acoustics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Health and Rehabilitation Sciences Publications
 
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Created: Thu, 26 Mar 2015, 09:07:28 EST by Ms Anna Rumbach on behalf of School of Health & Rehabilitation Sciences