Nadi Shodhana (Alternate Nostril Breathing)

Nadi Shodhana — from nadi (channel or river of pranic energy) and shodhana (purification or cleansing) — is the practice of alternating the breath through the left and right nostrils to purify and balance the entire pranic body. It is arguably the most important pranayama in the classical Hatha Yoga system, recommended for daily practice above all others, and described in the Hatha Yoga Pradipika as capable of purifying all 72,000 nadis in the body when practised with proper technique over an extended period.

The Nadis: Ida, Pingala, and Sushumna

In yogic anatomy, the body is traversed by countless pranic channels called nadis. The three most important are Ida (left channel, associated with the left nostril, the moon, cooling energy, and the parasympathetic nervous system), Pingala (right channel, associated with the right nostril, the sun, heating energy, and the sympathetic nervous system), and Sushumna (the central channel running through the spinal column, associated with neutral, balanced energy and the gateway to higher states of consciousness).

Ordinary breathing through the nostrils follows an ultradian rhythm — the body naturally alternates dominance between left and right nostril roughly every 90 minutes. Nadi Shodhana consciously equalises this alternation, balancing the activity of both channels and creating the conditions for energy to rise through the Sushumna.

How to Practise

Hand Position (Nasagra Mudra)

Bring the right hand to Nasagra Mudra: fold the index and middle fingers into the palm; the thumb will close the right nostril and the ring finger will close the left. The left hand rests in Chin Mudra on the left knee.

Steps — Basic (Without Retention)

1. Sit in a comfortable upright position. Take a few natural breaths to settle.
2. Close the right nostril with the right thumb. Exhale completely through the left nostril.
3. Inhale slowly and fully through the left nostril.
4. Close the left nostril with the ring finger. Release the thumb. Exhale through the right nostril.
5. Inhale through the right nostril.
6. Close the right nostril. Release the ring finger. Exhale through the left nostril.
7. This is one complete round. Practise 10–15 rounds.

Advanced: With Kumbhaka (Breath Retention)

Once the basic practice is established, introduce internal retention (Antara Kumbhaka) after each inhalation. The classical ratio is 1:4:2 — if the inhalation is 4 counts, the retention is 16 counts, and the exhalation is 8 counts. Build this ratio gradually over months.

Benefits

• Balances the nervous system: The alternation of active (Pingala/sympathetic) and passive (Ida/parasympathetic) channels creates measurable autonomic balance. Research confirms reduced heart rate variability asymmetry after regular practice.
• Clears the nasal passages: The mechanical alternation flushes mucus and allergens from both nasal passages, reducing congestion and sinusitis over time.
• Prepares for meditation: The balanced, inward quality of mind produced by Nadi Shodhana makes it the ideal practice immediately before sitting meditation.
• Reduces anxiety and hypertension: 15 minutes of slow Nadi Shodhana produces significant reductions in heart rate, respiratory rate, and blood pressure.
• Purifies the pranic channels: Regular practice over months and years progressively clears energetic blockages in the Ida and Pingala nadis, preparing the subtle body for advanced practices.

Contraindications

• Do not practise advanced retention (Kumbhaka) without guidance from a qualified teacher. Improper retention can cause dizziness, anxiety, or in rare cases, excessive nervous system stimulation.
• If nasal passages are blocked (during a cold), practise gentle Yogic Breathing instead until congestion clears.

Common Mistakes

The most common mistake is unequal pressure on the two nostrils — partially blocking rather than fully closing each side, resulting in air leakage. Ensure complete closure on each side. Another frequent error is rushing the exhalation to start the next cycle quickly; the exhalation should always be longer than or equal to the inhalation. Never strain or force the breath — the practice should feel effortless and produce a sense of progressive calm rather than any discomfort.