What Are the Eight Limbs of Yoga?

On this page, what the text says, when and why it was written, how practitioners have read it, and what modern research can and cannot support are kept apart on purpose. Collapsing them is how yoga writing becomes unreliable.

The eight, defined by the text

Sutra 2.29 names the eight, and the verses that follow define them:

1. Yama (2.30) — five restraints: ahimsa (non-violence), satya (truthfulness), asteya (non-stealing), brahmacharya (continence), aparigraha (non-grasping). 2.31 calls these a great vow, unconditioned by birth, place, time or circumstance.
2. Niyama (2.32) — five observances: shaucha (cleanliness), santosha (contentment), tapas (disciplined intensity), svadhyaya (self-study, including study of texts), ishvarapranidhana (devotion to, or surrender before, the divine).
3. Asana (2.46–2.48) — steady and comfortable, attained by relaxing effort.
4. Pranayama (2.49–2.53) — regulation of the movement of inhalation and exhalation, following the establishment of asana; it is said to thin the veil over the inner light and prepare the mind for concentration.
5. Pratyahara (2.54–2.55) — the senses disengaging from their objects and following the mind inward, yielding mastery over the senses.
6. Dharana (3.1) — binding attention to a single place.
7. Dhyana (3.2) — the uninterrupted flow of that attention.
8. Samadhi (3.3) — when attention becomes so absorbed that the sense of a separate observer recedes.

Sutra 3.4 then groups the last three as samyama, indicating they are stages of one continuous process rather than three separate techniques.

Where the eightfold scheme came from

The eightfold scheme is Patanjali's systematisation, drawing on earlier lists of yogic limbs circulating in the ascetic and Buddhist environments of the period; comparable enumerations of six or seven limbs appear in other early sources. It became canonical in part because the Yoga Sutras themselves became the reference text of philosophical yoga, and in the modern era because the scheme is teachable.

Hatha yoga, arising much later, does not simply follow this eight-limbed order: it builds its own sequence around shatkarma, asana, pranayama, mudra and samadhi, and the Hatha Yoga Pradipika presents hatha as the staircase leading to raja yoga rather than as the same thing. The Gheranda Samhita gives seven limbs, not eight.

Limb, not step

The word anga means limb, not step — and commentators have long noted the implication. Limbs of a body grow together and serve one another; they are not climbed in sequence with earlier ones discarded. On this reading, yama and niyama are not entry requirements to be passed but ongoing conditions that make the later limbs stable. A practitioner does not perfect non-violence and then start sitting.

At the same time the order is not arbitrary. The tradition treats the progression as moving from the most external and social to the most internal: conduct, then body, then breath, then the senses, then attention itself. The first five are frequently called the outer limbs and the last three the inner limbs, because samyama is where the practice's stated aim is actually approached.

What research can and cannot speak to

Modern research can speak to fragments of this scheme and not to the whole of it. Attention-training practices resembling dharana and dhyana have been studied extensively: effects on sustained attention and on self-reported stress are reasonably consistent, while claims about structural brain change are weaker and often based on small studies. Slow breathing of the kind pranayama includes has measurable short-term effects on heart-rate variability and reported calm. Asana as exercise has well-established effects on mobility, strength and balance.

Nothing in modern research evaluates the eight limbs as a path toward samadhi — the aim is not a measurable outcome, and no study design addresses it. Treating scientific findings as validation of the scheme misrepresents both. The ethical limbs, in particular, are commitments rather than interventions, and they do not become more or less worth keeping depending on trial results.

Restoring the missing limbs

The most common modern distortion is not doubting the eight limbs but silently reducing them to one. If you want a practical way to restore the rest without adding hours, the traditional shape is small and repeatable: one ethical commitment held consciously for a period, a settled seat, some minutes of quiet breathing, and a short spell of attention on one object. Our breathing guides cover the pranayama limb in practical detail, and the text pages set each limb back in its own source.