Bikram Yoga founded Bikram's Yoga College of India. He has also written books and sings. As of 2006, he had 1,650 yoga studios around the world. In 2012, there were 330 studios in the United States and 600 worldwide. A 2013 review of adverse effects from yoga found that Pranayama and Bikram were the most commonly cited styles, and found harm arising mostly in instructors who practiced intensely over a long period of time and who used advanced positions like handstands; in Bikram most of the adverse events arose from the heat and included low salt levels due to excessive water drinking
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,