Hatha yoga of "Hatha yoga pradipika", "Siddhasana" is the most suitable and easiest posture to learn breathing exercises. The different Hatha yoga texts discuss "pranayama" in various ways. For example, "Hatha yoga pradipka" in section 2.71 explains it as a threefold practice: "recaka" (exhalation), "puraka" (inhalation) and "kumbhaka" (retention). During the exhalation and inhalation, the text states that three things move: air, prana and yogi's thoughts, and all three are intimately connected. It is "kumbhaka" where stillness and dissolution emerges. The text divides "kumbhaka" into two kinds: "sahita" (supported) and "kevala" (complete). "Sahita kumbhaka" is further sub-divided into two types: retention with
Ashtanga vinyasa yoga the practice have been made since its conception. Nancy Gilgoff, an early student, describes many differences in the way she was taught ashtanga to the way it is taught now. According to her experiences, some of the differences include: Pattabhi Jois originally left out seven postures in the standing sequence, but later assigned Utthita Hasta Padangusthasana and Ardha Baddha Padmottanasana before the Intermediate Series was given; Utkatasana, Virabhadrasana A and B, Parivritta Trikonasana, and Parivritta Parsvakonasana were not in the series at this point; and Jois did not give her vinyasa between sides of the body poses or between variations