Practice

Pranayama

Also known as: prāṇāyāma, prāṇa-āyāma, yogic breathwork

The fourth limb of Patañjali's eight-limbed [[yoga-philosophy|Yoga]] — the disciplined regulation of the breath. The Sanskrit compound *prāṇa-āyāma* is usually translated *extension* or *lengthening of the breath* (from *āyāma*, *to extend*) but is also read as *prāṇa-yāma*, *restraint of the breath*. Both senses are operative: the practice lengthens the breath and at certain stages suspends it. *Prāṇa* itself names not just the breath but the **vital energy** of which the breath is the most accessible expression; *prāṇāyāma* is therefore a practice on the energetic body, not merely a respiratory one. The classical [[hatha-yoga|haṭha]] texts develop *prāṇāyāma* into an elaborate science: the **Haṭha Yoga Pradīpikā** describes 8 named *kumbhakas* (breath-retentions), and the **Gheraṇḍa Saṃhitā** treats *prāṇāyāma* as the central practice. In contemporary [[modern-postural-yoga|modern yoga]] *prāṇāyāma* survives as a smaller component than *āsana* — often a few minutes at the start or end of a class — though dedicated *prāṇāyāma* classes are taught widely and a robust scientific literature has accumulated on the physiology of slow, controlled breathing. The most widely practiced techniques include *ujjāyī*, *nāḍī śodhana*, *kapālabhāti*, *bhastrikā*, *sītalī*, and *bhrāmarī*.

The breath is the only autonomic function ordinarily under voluntary control. Prāṇāyāma takes that fact and builds on it: by working with the breath, the practitioner gains a handle on the prāṇa — the [[qi|vital energy]] — and through prāṇa on the citta, the mind. Patañjali names this directly: Yoga Sūtras 2.52 — tataḥ kṣīyate prakāśa-āvaraṇam — thereupon the veil over the inner light dissolves. And 2.53 — dhāraṇāsu ca yogyatā manasaḥ — and the mind becomes fit for concentration. Prāṇāyāma is the bridge between the outer and inner limbs.

Prāṇa and the energetic body

[[hatha-yoga|The haṭha tradition]] holds that the body is animated by prāṇa, the vital energy, which circulates through a network of nāḍīs (channels). Three principal nāḍīs: iḍā (lunar, left, cooling), piṅgalā (solar, right, heating), and suṣumnā (central, the axis along the spine). Ordinarily prāṇa flows through iḍā and piṅgalā — the cooler and warmer channels alternating with the natural breath cycle. The goal of advanced prāṇāyāma is to redirect prāṇa into suṣumnā, where its ascent is associated with the awakening of kuṇḍalinī and the deep meditative states of samādhi.

The empirical reading: whether or not the nāḍī anatomy is taken literally, the practice’s effects on autonomic state, heart-rate variability, and subjective experience are real and now reproducible in laboratory settings. The traditional language and the physiological language describe the same phenomena from different positions.

The four phases of the breath

Every cycle of prāṇāyāma operates on four moments:

Pūraka — inhalation.
Antaḥ-kumbhaka — internal retention (held after inhale).
Recaka — exhalation.
Bāhya-kumbhaka — external retention (held after exhale).

Different techniques emphasize different phases; the ratios (1:4:2:_, or 1:2:2, or equal-square) define the practice’s effect. Kumbhaka — retention — is the technically demanding and traditionally restricted core; classical instructions reserve extended kumbhaka for advanced practitioners under teacher supervision.

The principal techniques

A short field-guide to the most-practiced prāṇāyāmas:

Ujjāyī — victorious breath. A slight constriction of the glottis produces a quiet oceanic sound. The default breath of the [[k-pattabhi-jois|Ashtanga vinyasa]] tradition; warming, steadying, easy to learn.
Nāḍī śodhana — channel-cleansing. Alternate-nostril breathing: inhale left, exhale right, inhale right, exhale left. Balances iḍā and piṅgalā; the workhorse autonomic-balancing practice.
Kapālabhāti — skull-shining breath. Rapid forceful exhalations with passive inhalations. Energizing, heating, a ṣaṭkarma as much as a prāṇāyāma — clears the respiratory tract. Cautioned in pregnancy, hypertension, and on a full stomach.
Bhastrikā — bellows breath. Forceful inhalation and exhalation at equal rate. More intense than kapālabhāti; significant cardiovascular load.
Sītalī / sītkārī — cooling breaths. Inhalation through a curled tongue (sītalī) or pursed teeth (sītkārī); evaporative cooling of the breath.
Bhrāmarī — bee breath. Humming exhalation. Increases nasal nitric oxide production; calming; useful for tinnitus and pre-sleep practice.
Sūrya-bhedana / candra-bhedana — solar / lunar piercing. Single-nostril breathing emphasizing right (heating) or left (cooling).
Mūrcchā — swooning breath. Prolonged retention to the edge of unconsciousness — a classical practice now rarely taught for obvious reasons.
Plāvinī — floating breath. Swallowing air into the abdomen until the body floats — an esoteric and rarely-practiced technique from the [[hatha-yoga-pradipika|Haṭha Yoga Pradīpikā]].

The first six are the standard contemporary repertoire; the last three are textually attested but specialized.

The contemporary research base

A substantial scientific literature now exists on slow controlled breathing. The most robust findings:

Six breaths per minute (≈10 seconds per cycle) maximizes heart-rate variability and baroreflex sensitivity — the resonance frequency of the cardiovascular system. This rate is close to what skilled prāṇāyāma practitioners naturally settle into.
Extended exhalation (longer than inhalation) shifts autonomic balance toward parasympathetic dominance via vagal afferents.
Nasal breathing increases nitric oxide production and improves oxygen uptake; the prāṇāyāma convention of nose-only breathing is supported here.
Alternate-nostril breathing has demonstrated effects on blood pressure, attention, and autonomic balance in controlled trials.

The convergence between traditional practice and contemporary physiology is one of the cleaner examples available — see also [[breathwork]] for the broader contemporary field.

Cautions

Kumbhaka (retention) practices are traditionally taught only after years of preparatory work and under direct instruction. Aggressive retention can trigger hypertensive episodes, panic responses, and (in vulnerable people) seizures.
Kapālabhāti and bhastrikā are contraindicated in pregnancy, uncontrolled hypertension, cardiovascular disease, recent abdominal surgery, glaucoma, and active gastric ulcer.
The energetic effects of intensive prāṇāyāma are real and can be destabilizing — kuṇḍalinī-related crises are documented in clinical literature.

The practice is potent. Like any potent practice it deserves respect.

Sources

Patañjali. The [[yoga-sutras|Yoga Sūtras of Patañjali]]. Trans. Edwin F. Bryant. North Point, 2009. Source class: primary text + commentary.
Svātmārāma. [[hatha-yoga-pradipika|Haṭha Yoga Pradīpikā]]. Trans. Brian Dana Akers. YogaVidya, 2002. Source class: primary text.
Gheraṇḍa Saṃhitā. Trans. James Mallinson. YogaVidya, 2004. Source class: primary text.
[[bks-iyengar|B.K.S. Iyengar]]. Light on Prāṇāyāma. Crossroad, 1981. Source class: book / canonical modern manual.
Richard P. Brown and Patricia L. Gerbarg. The Healing Power of the Breath. Shambhala, 2012. Source class: book / clinical applications of yogic breathing.
Andrea Zaccaro et al. “How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing.” Frontiers in Human Neuroscience 12 (2018): 353. Source class: peer-reviewed review article.
Marc A. Russo et al. “The Physiological Effects of Slow Breathing in the Healthy Human.” Breathe 13:4 (2017): 298–309. Source class: peer-reviewed review.

Lenses still to grow

Kumbhaka as a distinct practice — the textual treatment, traditional restrictions, contemporary controversies.
Prāṇāyāma in clinical settings — hypertension, anxiety, asthma, PTSD trials.
The bandhas (energetic locks: mūla, uḍḍiyāna, jālandhara) as the haṭha companions to prāṇāyāma.
Prāṇa itself — the concept across Vedic, Upaniṣadic, tantric, and haṭha sources.

What links here, and how

Inbound connections from across the wiki, grouped by lens and by relationship. These appear automatically — every entity page declares what it links to, and that data populates here on the targets.

Practical

parallels

Sun Salutation the breath-linking is the practice's defining feature — each movement is paired with a specific phase of breath; sustained sūryanamaskāra is *prāṇāyāma* in motion

includes limb

Yoga fourth limb (*prāṇāyāma*) — the extension and discipline of the breath

Cultural

defines

Yoga Sutras treats *prāṇāyāma* as the fourth limb (YS 2.49–53); the bridge between outer and inner limbs

Energetic / Traditional Medicine