Humming changed breathing patterns, but stress ratings showed no clear difference
A small randomized study examined whether humming’s physiological effects reflected sound or breathing patterns, while also measuring participants’ feelings.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Both humming conditions produced slower, steadier breathing than rest or deep breathing. Regulated breathing showed an overall pattern of higher heart rate variability compared with rest. However, stress, anxiety, confidence, and relaxation ratings did not differ significantly across breathing conditions. These short-term findings in healthy adults do not establish that humming produces a felt calming benefit.
This abstract-based explanation cannot assess the full study methods. Breathing indices were estimated from heart rhythm patterns. The brief observation period leaves lasting effects and the proposed mechanism unresolved.
What researchers found
Self-rated stress, anxiety, confidence, and relaxation
Visual analog scale ratings compared across breathing conditions during the 5-day study.
Testing sound and breathing
The study asked whether humming’s effects reflected sound or breathing patterns. Humming with versus without noise-canceling earphones showed no statistically significant differences in respiratory or heart rate variability measures. This does not establish equivalence; the authors favored an explanation involving longer exhalation.
Physiology and reported feelings
Participants rated stress, anxiety, confidence, and relaxation separately from the heart rhythm measurements. The absence of statistically significant rating differences does not rule out an effect, but it limits claims that the physiological pattern translated into felt relief.
The original publication
Humming Breathing and Autonomic Regulation: A Preliminary Study of Resonance Frequency and Vibratory Mechanisms.
Kim T, Lee S, Woo M
Appl Psychophysiol Biofeedback · 2026
- PubMed ID
- 41686399
- Record checked
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