Bhujangasana

Bhujangasana appears in the second lesson of the Gheranda Samhita and not in the Hatha Yoga Pradipika, which is a useful marker of how the classical posture repertoire grew. The Pradipika's fifteen seats are almost entirely cross legged; the Gheranda Samhita's thirty two add a group of prone forms, and the serpent is one of them.

What sets it apart from its neighbours in that group is the claim the text makes for it. The Gheranda Samhita says the posture raises the bodily heat, destroys disease, and awakens the serpent goddess who sleeps at the base of the spine. Those are the text's statements and the atlas reports them as such. The third is the interesting one, because it is a direct link between a bodily shape and the kundalini doctrine that the hatha literature otherwise reserves for breath restraint, the locks and the seals. Most postures in the corpus are described as seats or as remedies; very few are described as doing the work that the tradition normally assigns to the pranayama chapters.

The naming logic is transparent. Bhujanga is the serpent, and the raised head and chest over a body still lying on the ground is a snake rearing. The serpent is not a neutral choice of animal in this literature: it is the form the tradition gives to the coiled energy at the base of the spine, and the posture that mimics a snake lifting is the one the text says wakes her.

Comparing the classical descriptions with what is taught under the same names today is usually an exercise in discontinuity. Names have moved between shapes, shapes have been rebuilt around different joints, and a large part of the modern repertoire, the standing sequences above all, has no counterpart in the medieval manuals at all. Mark Singleton's Yoga Body traces how the practice that spread worldwide in the twentieth century was assembled from the hatha inheritance together with Indian physical culture and European gymnastic systems, which is why the correspondence between text and studio is so often loose.

Bhujangasana is the exception that makes the pattern visible. The shape the Gheranda Samhita describes, prone from the navel down, palms planted, head and chest raised, is recognisably the shape taught under that name now. Of the thirty two postures in the later manual it is the one that has travelled furthest with the least alteration.

That continuity does not extend to the framing. The text presents the posture as heating the body and rousing the serpent goddess; modern instruction generally presents it as work for the spine and the front of the body. The same arrangement of limbs is doing an entirely different job in the two accounts, which is a reminder that a posture is not only a shape. The atlas records the classical claims as the classical texts make them and does not restate them as effects.