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 asana practice, but also stated that the breathing should be deep breathing with sound. He reiterated this notion in a conference in 2013 stating, "You do normal breath, inhalation and exhalation with sound. Ujjayi breath is a type of prāṇāyāma. This is just normal breath with free flow". In 2014 published on YouTube, Manju Jois dodged the question, "What is the difference between Ujjayi breathing and free breathing?" by saying that "the breathing in Ashtanga should be long and deep with the sound like the ocean". He also states that if you don't make sound, that is okay, too. However