Within the classical understanding of Rāja Yoga as presented in Patañjali’s Yoga Sūtras, the role of physical posture is surprisingly modest. Āsana, the third limb, is defined not as a catalogue of elaborate poses but as a condition: “sthira-sukham āsanam” – a posture that is both steady and comfortable. The emphasis falls on the quality of the seat rather than on its external form, so that the body no longer intrudes upon the mind’s inward movement. What matters is a stable, upright sitting position in which the spine is erect yet relaxed, the body balanced and relatively free of discomfort, allowing attention to turn inward for extended periods.

Traditional practice often embodies this principle through familiar seated postures. Forms such as Padmāsana (lotus pose), Siddhāsana (accomplished pose), Sukhāsana (easy pose), or Vajrāsana (thunderbolt pose) are frequently used because they lend themselves to stillness and ease when properly established. Yet the underlying teaching does not insist on a single, universally prescribed pose; any seated position that can be maintained with steadiness and comfort fulfills the classical requirement. In this sense, the “specific posture” is less a fixed shape and more a functional criterion: the body becomes a quiet, unobtrusive support for the deeper limbs of practice.

This restrained approach to āsana reflects the broader orientation of Rāja Yoga. Unlike later systems that elaborate many physical postures, the concern here is not flexibility or strength but the creation of a firm, easeful foundation for prāṇāyāma and meditation. Once such a posture is established, the practitioner’s task is to let the body recede from the foreground of awareness so that attention can be gathered, refined, and ultimately absorbed. The true “royal” aspect of this path lies not in the outer form of the pose, but in the inner stillness it is meant to safeguard.