Alternate Nostril Breathing (Nadi Shodhana): Benefits, How-To and Rhythms

Key takeaways

Alternate nostril breathing, known in yoga as nadi shodhana, is a pranayama technique in which you breathe through one nostril at a time: inhale left, exhale right, inhale right, exhale left. The pace is slow, with an exhale twice as long as the inhale (for example 4 seconds in, 8 seconds out). Its main effect is a calmer nervous system: a clearer mind, a slight drop in blood pressure, and higher heart rate variability (HRV).

• One full round is two breaths (left side, then right side); BreathLife guides 10 rounds per session, about 3 to 12 minutes depending on your level.
• Two versions in the app: "Clear Mind" with no breath hold (3-6 up to 12-24 seconds) and "Athlete's Breath" with a full-lung hold (3-3-6 up to 12-12-24 seconds).
• In 26 volunteers, systolic blood pressure fell and HRV rose during 15 minutes of alternate nostril breathing (Telles et al., 2014).
• In 90 people with hypertension, 10 minutes were enough to lower both systolic and diastolic blood pressure (Telles et al., 2013).
• The natural nasal cycle switches the dominant nostril every 25 minutes to several hours (Werntz et al., 1983): a partly blocked nostril is normal, and you should never force it.

What is alternate nostril breathing (nadi shodhana)?

Nadi shodhana is Sanskrit for "channel purification": nadi means channel and shodhana means cleansing. In yogic tradition, the breath flows through two main channels, ida on the left and pingala on the right, and alternating nostrils is meant to balance them. You do not need to accept that framework to benefit from the practice. Physiologically, alternate nostril breathing is slow, steady nasal breathing with a long exhale and sustained attention on a simple hand movement.

You will also see the name anulom vilom (or anuloma viloma). Depending on the school, it refers to the exact same practice or only to the version without breath holds, with nadi shodhana reserved for the version with retention. In this article, "alternate nostril breathing" covers both, and we say each time whether a hold is involved.

How it differs from neighboring techniques:

• Unlike cardiac coherence breathing, inhale and exhale are not equal: the exhale lasts twice as long.
• Unlike box breathing, the basic version has no holds at all, and the hand, not a four-count, gives the breath its structure.
• Unlike kapalabhati, it is slow, silent, and never forced.

It is one of the foundational exercises of pranayama, usually taught first because it is gentle, accessible, and requires no particular fitness.

How to do alternate nostril breathing, step by step

Hand position: Vishnu mudra

Use your right hand. Fold the index and middle fingers into the palm, or rest them lightly between the eyebrows. The thumb will close the right nostril; the ring finger, helped by the little finger, will close the left. Keep the elbow low and the shoulder relaxed. If the arm tires, support the elbow with your other hand or a cushion. Left-handers can mirror the position with the left hand; what matters is alternating the nostrils in the same order every time.

The basic round, no holds

1. Sit tall with a straight back, shoulders down, jaw loose. Empty your lungs through the nose.
2. Close the right nostril with the thumb and inhale through the left, slowly, for 4 seconds.
3. Close the left nostril with the ring finger, release the right, and exhale through the right for 8 seconds.
4. Inhale through the right, left nostril still closed, for 4 seconds.
5. Close the right, release the left, and exhale through the left for 8 seconds. That completes one round.
6. Repeat for 10 rounds, then lower your hand and breathe freely for a minute to notice the effect.

The advanced version follows the same path but adds a full-lung hold between inhale and exhale, lasting as long as the inhale (a 1:1:2 ratio, such as 4-4-8). Only add the hold once the basic version feels easy.

Common mistakes

• Forcing a blocked nostril. The nasal cycle (see below) makes one nostril narrower than the other for hours at a time. Breathe more gently on that side; if no air passes at all, breathe through both nostrils for a minute or postpone the session.
• Pressing too hard. The finger only needs to close the side of the nose, not squash the septum.
• Breathing too fast or too loud. The breath should be silent. If you can hear it, slow down or drop a level.
• Opening the mouth. The whole technique is nasal; we explain why in our guide to nasal vs. mouth breathing.
• Lifting the shoulders. Let the inhale drop into the belly first; the rib cage expands last.

Alternate nostril breathing rhythms by level

BreathLife offers two nadi shodhana exercises. "Clear Mind" is the version without holds, with a 1:2 inhale-to-exhale ratio. "Athlete's Breath" adds a full-lung hold equal to the inhale (1:1:2). Times below are in seconds and per nostril; one round covers both sides.

Even at the Strained level you breathe about 7 times per minute, roughly half the usual resting rate; at the Optimal level you are down to about 3 breaths per minute. That slowness is what drives most of the benefits, as long as it stays comfortable.

How to pick your level. The 60-second breathing age test measures your CO₂ tolerance: after a normal exhale, you hold your breath until the first urge to breathe. As a guide, under 10 s points to Strained, 10 to 15 s to Tired, 15 to 20 s to Optimal, 20 to 25 s to Efficient, and over 25 s to Exceptional; the exact thresholds shift with age. If a rhythm leaves you short of breath or forces your mouth open, go down one level. Breath quality matters more than the numbers.

Nadi shodhana benefits: what the research says

The benefits of alternate nostril breathing come from several mechanisms stacked together. First, slowness: below 10 breaths per minute, breathing engages the baroreflex and the vagus nerve, raising HRV and lowering heart rate. Second, the long exhale, which tips the balance toward the parasympathetic branch with every breath. Third, strictly nasal breathing plus attention on the hand, which gives the mind a job and interrupts rumination. A systematic review has also proposed that mechanoreceptors in the nasal cavity, stimulated by slow airflow, may modulate the olfactory bulb and, through it, cortical activity (Zaccaro et al., 2018).

Blood pressure and HRV

Researchers in India recorded 26 young men during 15 minutes of alternate nostril breathing. During the practice, systolic blood pressure and breathing rate fell, while two vagally mediated HRV indices (RMSSD and NN50) rose, which did not happen with simple breath awareness (Telles et al., 2014). In 90 people with essential hypertension, a single 10-minute session lowered systolic and diastolic blood pressure and improved a manual dexterity test (Telles et al., 2013). These are immediate effects; they do not replace treatment, but they explain why the exercise is often recommended alongside it, as we discuss in our guide to breathing and blood pressure.

What about complete beginners?

A study of 20 adults who had never practiced compared alternate nostril breathing with ordinary paced breathing at the same rate. Both raised HRV immediately after the session, with no meaningful difference between them (Ghiya and Lee, 2012). In other words, the slow rhythm does most of the work; the hand and the alternation mainly give your attention somewhere to rest. That is good news: the effects are not reserved for experienced yogis.

The nasal cycle is normal

In most adults, the nasal turbinates swell and shrink in alternation: one nostril breathes more easily than the other, then dominance flips, with a period ranging from 25 minutes to more than 200 minutes (Werntz et al., 1983). That early study also found relatively higher EEG activity in the hemisphere opposite the dominant nostril. Claims about "balancing the hemispheres" remain unproven, but one thing is clear: feeling one side narrower during nadi shodhana is expected and should not be fought.

Finally, a systematic review of 15 studies on slow breathing techniques summarized their shared effects: higher HRV, more alpha activity on EEG, and psychologically, more calm and alertness with less anxiety and confusion (Zaccaro et al., 2018). Alternate nostril breathing is one of the most structured ways to breathe that slowly.

When to use alternate nostril breathing, and when to skip it

Good moments

• Before focused work: writing, studying, an important meeting. That is what the name "Clear Mind" refers to. For high-stakes moments, see also breathing before exams and interviews.
• In the mid-afternoon slump, when attention fades but you do not want caffeine.
• As a transition between work and evening, to settle the mind without making you sleepy.
• Before meditation, its traditional role.
• After training, with "Athlete's Breath": the full-lung hold teaches you to stay calm with slightly higher CO₂, useful for recovery and CO₂ tolerance.

When to avoid or adapt it

• Fully blocked nose (cold, sinusitis, allergy): wait until air passes, or use an extended exhale through the mouth in the meantime.
• Right after a heavy meal: slow belly breathing is less comfortable.
• The version with holds is best avoided during pregnancy, with uncontrolled blood pressure, glaucoma, or a tendency to panic attacks: stay with "Clear Mind."
• While driving or walking, since one hand is busy.

BreathLife is not a medical device. If you have a respiratory or heart condition, are pregnant, or have epilepsy, ask your doctor before practicing.

Alternate nostril breathing vs. similar techniques

In practice, alternate nostril breathing sits between cardiac coherence, which calms without especially sharpening attention, and kapalabhati, which energizes. Many practitioners do a few minutes of kapalabhati and then nadi shodhana to finish calm and clear-headed.

How BreathLife guides this exercise

In the BreathLife app, alternate nostril breathing is called "Clear Mind," and the version with holds "Athlete's Breath." The rhythm adapts automatically to the level measured by your breathing age test, from 3-6 up to 12-24 seconds. The guided voice, in English or French, tells you which nostril to close and when to switch, so you can keep your eyes shut. You choose a 3, 5, or 10-minute session, your daily streak builds day after day with a free pass for the unexpected, and a group session brings the community together every Sunday at 8 p.m.

Conclusion

Alternate nostril breathing is one of the gentlest pranayama techniques and one of the best studied: a few minutes are enough to lower blood pressure and raise HRV, and you come out with a clearer head. Its golden rule fits in one line: slowly, through the nose, never forcing a nostril. To find the rhythm that suits you, start with the free breathing age test: in 60 seconds it gives you your level, and BreathLife sets "Clear Mind" accordingly.