Hatha Yoga Pradipika examining Buddhist tantric commentaries and medieval yoga texts that came before the "Hatha Yoga Pradīpikā", Birch found that the adverbial uses of the word suggests that it meant "force". Birch found that, "Rather than the metaphysical explanation of uniting the sun (ha) and moon (ṭha), it is more likely that the name haṭha yoga was inspired by the meaning 'force'." Hatha Yoga Pradipika The Hatha Yoga Pradīpikā ( or Light on Hatha Yoga) is a classic fifteenth-century Sanskrit manual on hatha yoga, written by "Svāmi" Svātmārāma, who connects the teaching's lineage to Matsyendranath of the Nathas. It is among the
Ashtanga vinyasa yoga and never taught by Sharath. However most of his teachers who claim to have been taught by him will teach the above methods, exercises, & postures, even though none of what they teach is part of the Ashtanga method of instruction under Sharath. Pattabhi Jois also did not require students to independently drop back and come up from back bending before progressing to the 2nd series. Sharath changed the requirements, and has now made this mandatory. However, it is important to note that Pattabhi Jois was the founder of the system, and taught each of his original students differently, instructing