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 classes in similar style, offering posture variations, and teaching Ashtanga in a much less linear style, with a greater emphasis on alignment and breathing. Sharath's "new generation" of young students have adopted Sharath's new rules, and teach in a linear style without variations. According to the Sharath generation, variations are not allowed, and practice must be in a strict Mysore environment under the guidance of a Sharath-approved teacher. How-to videos & workshops, detailed alignment instructions, and strength-building exercises are not part of the method, neither for the practitioner or the teacher. These types of instruction are not approved by Sharath,