Bikram Yoga are encouraged to develop their teaching skills the longer they teach. This results in varying deliveries and distinct teaching styles. Bikram Choudhury, founder of the Bikram Yoga system, is also the founder of the Yoga College of India. Born in Calcutta in 1944, Choudhury began practicing yoga at age four. He stated that he practiced yoga 4–6 hours every day. At the age of thirteen, he asserts that he won the National India Yoga Championship and was undefeated for the following three years and retired as the undisputed All-India National Yoga Champion. Choudhury later devised the 26 postures sequence and
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