Nadi Shodhana

Nadi shodhana, purification of the channels, is the alternate nostril breathing technique of the hatha yoga tradition, in which the practitioner closes one nostril at a time using the fingers in a fixed pattern to inhale and exhale alternately through each side, a practice classical hatha texts describe as clearing and balancing the nadis, the network of subtle channels through which prana, vital breath or energy, is understood to circulate through the body in the tradition's own physiological model.

The Hatha Yoga Pradipika, one of the foundational medieval texts of the hatha yoga tradition, includes nadi shodhana among its treatment of pranayama, breath discipline, describing the practice as preparatory purification necessary before more advanced pranayama and meditative work can be undertaken safely and effectively, positioning it as a foundational rather than advanced technique within the classical curriculum even though its correct performance still requires real attentiveness and instruction. The specific pattern of alternation, and the ratios of breath length classical texts sometimes specify between inhalation, retention and exhalation, vary somewhat between different hatha yoga lineages and later teaching traditions, reflecting the general pattern across pranayama practice of a shared core technique elaborated somewhat differently by different teaching lines.

Nadi shodhana is among the most widely taught of all the classical pranayamas in the modern, internationally spread yoga world, commonly introduced to beginning students precisely because classical tradition itself frames it as safe, foundational and generally suitable preparation for further practice, in contrast to more forceful techniques such as kapalabhati and bhastrika, which classical texts and contemporary teachers alike treat with somewhat more caution regarding who should attempt them and under what supervision.

Contemporary yoga teaching, both within traditional Indian lineages and across the modern international yoga and wellness industry, frequently recommends nadi shodhana specifically for calming the nervous system and settling the mind before seated meditation, a use consistent with, though somewhat differently framed from, the classical texts' own description of the practice as purifying the subtle channels in preparation for deeper pranayama and meditative absorption. The practice belongs to the broader Pranayama discipline within the yoga tradition, alongside kapalabhati, bhastrika and ujjayi among the other classically named pranayamas, and it is commonly taught and practised in combination with these related techniques as part of a structured pranayama sequence rather than as an isolated, standalone exercise.