Ashtanga is a very dynamic and athletic form of hatha yoga, made up of six series or levels, with a fixed order of postures. It is rooted in vinyasa, the flowing movements between postures, with a focus on energy and breath. While it is a very physical practice, it also promotes mental clarity and inner peace, ashtanga yoga dynamic and physically demanding style of yoga that follows a specific and structured sequence of postures and is known for its focus on breath (pranayama) and a set series of asanas (postures).