yoga meditation and inner life
What is nadi shodhana and why is it practiced before meditation?
What the tradition says
In yoga tradition, the body carries a network of channels called nadis through which life energy, called prana, flows. Three of these channels are central to this practice. Ida runs on the left side and is linked to cooling, calm, and the lunar quality. Pingala runs on the right and is linked to heat, activity, and the solar quality. Sushumna runs through the centre and is the channel that meditation aims to open. The idea is that when ida and pingala are blocked or unbalanced, the mind stays restless and scattered. Nadi shodhana, which means purification of the channels, clears and balances these two side channels so that energy can move freely through the central one. This is why it is done before dhyana, which is the Sanskrit word for deep meditation. The Hatha Yoga Pradipika, a classical text on yoga practice, places this breathing work as foundational preparation for the deeper stages of practice.
What it represents
Beyond the physical act of breathing, the practice carries a symbolic meaning. The left and right channels are seen as opposite forces, like sun and moon, or activity and rest. Balancing them is not just about the breath. It stands for bringing opposing energies into harmony within the person. The centre channel, sushumna, is associated with stillness and with the movement of awareness inward. So the practice is a kind of preparation at every level, physical, energetic, and mental.
What research suggests
Some research has looked at how alternate nostril breathing affects the nervous system. Early findings suggest it may reduce heart rate and support a calmer state. There is also some interest in how the two nostrils relate to different sides of the brain. However, the evidence is limited and the studies are small. Nothing in current science confirms the traditional picture of nadis as physical channels. The calming effect many people notice is real, but its exact cause is still being studied.
How people use it today
Many people practice nadi shodhana simply as a way to settle the mind before sitting quietly. Some follow the traditional method closely, with specific counts for inhale, hold, and exhale. Others use a looser version, just breathing slowly through alternate nostrils for a few minutes. It appears in yoga classes, in personal morning routines, and in wellness settings far outside India. How strictly it is practiced and what meaning people attach to it varies widely from tradition to tradition and person to person.