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 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