Effectiveness of Vocal Exercises in Singers: A Scoping Review

Abstract

Introduction: This scoping review aimed to evaluate the effectiveness of vocal exercises-especially semi-occluded vocal tract exercises (SOVTE), vocal function exercises (VFE), and structured warm-ups-on acoustic, perceptual, and physiological outcomes in trained singers.

Methods: We followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and conducted a comprehensive search in Scopus, WOS, and PubMed for studies published in the last 10 years. Inclusion criteria were quantitative outcomes, formal vocal training, and use of SOVTE, VFE, or structured warm-ups. Two reviewers independently screened titles, abstracts, and full texts. Twenty studies were included. Data were synthesized thematically across four dimensions: acoustic/aerodynamic effects, perceptual/physiological benefits, training protocol effectiveness, and application in singing contexts.

Results: The most consistent benefits included improvements in jitter, shimmer, vocal resonance, vocal comfort, phonation time, and flexibility. Structured protocols demonstrated adaptability across singing styles.

Conclusion: Evidence-based vocal exercises enhance vocal health and performance in trained singers. Standardized methodologies and broader sampling are needed to strengthen future research. No protocol registration was conducted.

Keywords: Scoping review; Semi-occluded vocal tract exercises; Singers; Vocal function exercises; Vocal health.