Hatha Yoga Pradipika formation of yoga. Jason Birch has investigated the evolution of the meaning of the Sanskrit word ""haṭha"." He specifically researched the key role of the "Hatha Yoga Pradīpikā" in popularizing a particular interpretation of this term. When written, the "Hatha Yoga Pradīpikā" drew from various classic texts on different systems of yoga, and Svātmārāma grouped what he had found under the generic term "haṭha yoga". Although haṭha yoga has evolved into a generic term that is currently understood as a branch of yoga involving physical poses (including sun salutations, vinyāsas, aṣṭāṅga, etc.), it originally had a more specific meaning. After
Ashtanga vinyasa yoga the practice have been made since its conception. Nancy Gilgoff, an early student, describes many differences in the way she was taught ashtanga to the way it is taught now. According to her experiences, some of the differences include: Pattabhi Jois originally left out seven postures in the standing sequence, but later assigned Utthita Hasta Padangusthasana and Ardha Baddha Padmottanasana before the Intermediate Series was given; Utkatasana, Virabhadrasana A and B, Parivritta Trikonasana, and Parivritta Parsvakonasana were not in the series at this point; and Jois did not give her vinyasa between sides of the body poses or between variations