What is yoga?

Most people meet yoga as a room, a mat, and an hour of unfamiliar shapes. That is a real and complete way in. But it is one branch of something considerably older and stranger, and the branch is recent enough that people who practised yoga for most of its history would not recognise it.

The Sanskrit root is yuj — to yoke, to join, to harness. What is being joined has never been settled. Different traditions have answered: the mind to a single point of attention, the individual self to something larger, the practitioner to a discipline. The ambiguity is not sloppiness. It is a genuine disagreement that has run for two millennia.

Three answers worth knowing

The Bhagavad Gita, composed somewhere in the last few centuries BCE, uses "yoga" for several distinct paths at once — action performed without attachment to its results, devotion, and knowledge. None of them involve postures. Yoga there is closer to a way of holding your life than a thing you do for an hour.

Patanjali's Yoga Sutras, usually placed somewhere around the third to fifth century CE, open with a definition so compact it is still argued over: yoga is the stilling of the movements of the mind. The text is a manual for attention. Of its roughly 195 aphorisms, precisely three concern posture, and they say only that it should be steady and comfortable.

Hatha yoga, emerging in texts from around the eleventh century onward, is where the body arrives properly. It is a physical technology — postures, breath control, internal locks and cleansing practices — aimed at a specific goal: preparing and transforming the body so that the mind can do what the earlier traditions asked of it. Even here, the posture count is modest. The fifteenth-century Hatha Yoga Pradipika describes about fifteen.

The part that is genuinely modern

The flowing, posture-dense, athletically demanding practice most studios teach took shape in the late nineteenth and early twentieth centuries, largely in India, and largely through contact between hatha traditions and European physical culture — gymnastics, calisthenics, the international fitness movement of the period. Historians of the subject broadly agree on this; it is not a fringe reading.

You will still see "five thousand years of unbroken tradition" on studio walls. There is no good evidence for it. The oft-cited Indus Valley seal showing a seated figure is genuinely ambiguous and has been read a dozen ways. What is real is a documented textual tradition running back roughly two and a half thousand years, and a posture practice perhaps a century and a half old in its current form.

This is not a debunking. A practice does not need to be ancient to be worth doing, and the modern synthesis is a genuine achievement rather than a corruption. But being accurate about it costs nothing and makes the whole subject easier to think about clearly.

So what are you signing up for?

In a contemporary studio: mostly asana, the physical postures, usually coordinated with breath, sometimes with a few minutes of stillness or breathwork at either end. That is the practical answer, and for many people it stays the whole answer, quite legitimately.

The larger answer is that asana is one of eight limbs in Patanjali's scheme, and the other seven concern ethics, breath, attention and states of absorption. You are not obliged to follow any of them. But they are what the rest of this section is about, and they are the reason the practice has held people's interest for as long as it has.

Yoga is the stilling of the movements of the mind.

Yoga Sutras 1.2, one of many defensible translations