Does Humming Produce Nitric Oxide? 10 Coaching Practices to Try

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Practices that may help

1. Nasal humming to boost nitric oxide
   Hum for 1-2 minutes after waking to flood the sinuses with nitric oxide before it is inhaled.
   Nasal Breathing for Performance
2. Bhramari (humming bee breath)
   Exhale on a humming sound with fingers covering the ears to deepen the vagal vibration.
   Nostril Breathing: Pranayama for Calm and Focus
3. Vagal Tone, Honestly Explained
   Vagal tone refers to the activity of the vagus nerve in the parasympathetic ("rest and digest") branch of the nervous system, often estimated via heart-rate variability (HRV); higher resting HRV is associated with better stress regulation. Some practices — especially slow, long-exhale breathing — reliably raise HRV in the moment, while others (cold exposure, humming, movement) are mechanistically plausible but less firmly established. Be skeptical of marketing that promises to permanently "reset" your vagus; the honest claim is that these are useful state-regulation levers.
4. Humming, chanting, and vocal toning
   Hum, chant, or tone on a long exhale to engage the vagus via the throat and lengthened breath.
   Vagal Tone, Honestly Explained
5. Nasal Breathing for Performance
   Nasal breathing filters, warms, and humidifies air, and generates nitric oxide that widens blood vessels and improves oxygen uptake at the tissues. Switching from mouth to nasal breathing during exercise and sleep has demonstrated measurable improvements in recovery, endurance, and sleep quality in clinical and observational work, though large RCTs are limited.
6. Nasal breathing during Zone 2 to train respiratory efficiency
   Training with nose-only breathing during easy sessions builds diaphragmatic strength and CO2 tolerance that transfers to aerobic performance.
   VO2 Max and Longevity: Training Your Aerobic Ceiling
7. Nasal box breathing (4-4-4-4)
   Breathe in, hold, out, hold — each for four counts — through the nose only.
   Nostril Breathing: Pranayama for Calm and Focus
8. Cyclic sighing (one minute of repeated physiological sighs)
   Repeat the double-inhale pattern continuously for one to five minutes for a sustained shift in state.
   The Physiological Sigh, Made Practical
9. Nasal-only breathing during light-to-moderate exercise
   Train yourself to breathe exclusively through the nose at a pace where you can sustain it.
   Nasal Breathing for Performance
10. The Voo Breath: Vagal Activation Through Sound
    The Voo breath is a practice from Peter Levine’s Somatic Experiencing in which you exhale slowly while voicing a low, resonant "Voo" sound — think foghorn, felt in the chest and belly. The extended exhalation and the resonant vibration both stimulate the vagus nerve, shifting the autonomic balance toward the parasympathetic "rest and digest" state. The vagal mechanism is physiologically plausible and consistent with broader evidence on humming, chanting, and slow-exhale breathing; this specific practice has not been tested in independent controlled trials.

Does this sound like the set of challenges you might be facing?

• I want one tiny thing I can do right when I wake up→
• My head is loud and overstimulated and plain breathing isn’t cutting through it→
• Just counting my breath feels dry and I lose interest fast→
• I’m gasping through my mouth almost as soon as I start moving, even at an easy pace, and I want to train my breathing itself to be more efficient→
• My mind is racing and I can’t settle on my own, so I just want a steady, even box to breathe inside→

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