Moon Breath (Chandra Bhedana)

Loading friend activity...

Breathe In

Cycle 1 of 8

10 seconds per cycle

30 seconds total

inhale

exhale

A cooling yogic practice of breathing in through the left nostril to invite calm, traditionally used to quiet the mind before sleep.

Cadence: 6 bpm
Difficulty: intermediate
Effect: Calming
Family: Settle
For: SleepRelaxationPranayama

How to practice

1.Sit comfortably with a tall spine and soften your face, jaw, and shoulders.
2.Bring your right hand up and gently close your right nostril with your thumb.
3.Inhale slowly and quietly through your left nostril only, keeping the breath smooth and unhurried.
4.Close the left nostril with your ring finger, release the thumb, and exhale gently through the right nostril.
5.Keep inhaling left and exhaling right for the whole practice, the breath stays soft, with the exhale a touch longer than the inhale.
6.Lower the hand and breathe normally for a few breaths at the end, noticing how you feel.

When to use this

In the evening or before bed, or any time you feel overheated, wired, or overstimulated and want to down-shift toward calm.

Benefits

Calms and cools the system
Settles the mind before sleep
Reduces overstimulation
A gentle evening ritual

Mechanism

Moon Breath channels every inhale through the left nostril, which yoga associates with ida nadi, the cooling, calming 'lunar' channel. Physiologically, slow nasal breathing with a lengthened exhale leans on the parasympathetic nervous system, and there is longstanding (if still-debated) interest in whether left-nostril breathing biases activity toward a calmer, more restorative state. Whatever the truth of the nostril-specific claims, the slow pace and extended exhale themselves reliably encourage a settling, pre-sleep down-shift.

Evidence

Small studies on unilateral (single-nostril) breathing report differences in blood pressure, heart rate, and autonomic measures between left- and right-nostril breathing, with left-nostril practice linked to calmer, more parasympathetic shifts, but the research is limited, mixed, and often low-quality, so the nostril-specific effects should be held loosely. What sits on firmer ground is that slow, exhale-lengthened nasal breathing supports relaxation. Treat Moon Breath as a gentle calming ritual, not a proven remedy for insomnia or high blood pressure.

Lineage

Chandra Bhedana ('chandra' (moon) and 'bhedana' (piercing, or passing through)) is a classical hatha-yoga pranayama, the cooling lunar counterpart to the warming Surya Bhedana (Sun Breath). It grows out of the yogic model of ida (lunar, left, cooling) and pingala (solar, right, heating) nadis, the subtle energy channels described in hatha texts such as the Hatha Yoga Pradipika. It has traditionally been practiced to cool and quiet the system.

Variations and progression

Add a gentle pause after the inhale once the basic pattern feels easy, to deepen the calming effect (keep it comfortable).
Lengthen the exhale further (e.g. inhale 4, exhale 8) for a stronger wind-down.
No-hands version: simply direct your attention and airflow to the left nostril if lifting the hand is tiring.
Pair with Sitali or Sitkari cooling breaths on a hot night.

Start with a handful of soft cycles and make sure the mechanics (hand position, smooth one-sided airflow) feel natural before lengthening anything. Build toward several minutes of even inhale-left, exhale-right breathing, then, if you like, add a brief post-inhale pause or a longer exhale. Keep it gentle; this is a calming practice, not a breath-control feat.

Practice next

Common mistakes

Switching nostrils each cycle like alternate-nostril breathing. Moon Breath keeps every inhale on the left and every exhale on the right.
Pressing the nostril hard or forcing the airflow; the touch is light and the breath quiet.
Practising it as an energising morning breath, that's Sun Breath's job; Moon Breath is for winding down.
Straining for long counts, which defeats the calming purpose.

FAQ

What's the difference between Moon Breath and alternate-nostril breathing?

Alternate-nostril breathing switches sides each cycle to balance you. Moon Breath is one-directional (always in through the left, out through the right) to bias toward cooling and calm.

Why the left nostril?

In yoga the left nostril links to ida nadi, the cooling, calming channel. Some small studies suggest left-nostril breathing nudges the nervous system toward a calmer state, though the evidence is limited.

Can I do this lying in bed?

Yes. It's often used as a pre-sleep practice. If holding your hand up is awkward lying down, just guide your attention and breath through the left nostril.

Safety

This is an intermediate practice: get comfortable with slow nasal breathing before adding one-sided control, and keep every breath easy and unforced.
Skip or ease off if your nose is congested; never strain to breathe through a blocked nostril.
Stop and return to normal breathing if you feel lightheaded or spacey.
Breathwork complements, not replaces, medical care. Check with a clinician first if you're pregnant or have a heart, respiratory, or blood-pressure condition.

Breathwork is a complement to (not a replacement for) professional medical care. If you have a heart, respiratory, or blood-pressure condition, are pregnant, or feel unwell, check with a clinician before practising breath-hold techniques.