Effects of warm-up exercises on self-assessed vocal effort.

Only 26 participants, all vocally healthy young adults aged 18 to 30, so the findings cannot be applied to voice patients, older adults, or anyone with a hyperfunctional voice disorder. No control for how much the participants had already used their voices before the session, which the authors acknowledge could shift baseline effort. No objective measures of vocal intensity, subglottal pressure, or phonation threshold pressure were taken, so the increase in perceived effort cannot be confirmed as a real change in phonatory load. The warm-up sessions were only five minutes, which the authors note may represent the very start of a warm-up process rather than a completed one. The Borg CR-10 scale has only 10 levels, which the authors and a cited prior study suggest may be too coarse to detect small but clinically meaningful changes. Single site, single session, and one participant was excluded after the fact for not following instructions.

The authors declare no financial or organizational conflicts of interest.

Do not read this as evidence that straw phonation is superior to reading aloud for reducing vocal effort. The between-group comparison was null at every time point, and both groups actually increased their perceived effort after the warm-up, the opposite of what was hypothesised. The only significant within-group difference was that the straw-phonation group's effort dropped more after the second silence period, which the authors interpret as the unfamiliar sensory feedback wearing off, not as a therapeutic benefit.