Ashtanga Yoga is still taught in its pure form in Mysore, India and is based on a disciplined cultivation of meditative self practice, through which the student is progressively taught a set sequence of postures that increase in level of difficulty. It is the original foundation of Vinyasa, through which body postures (Asana) are synchronized with the flow of breath (Ujjayi), while gently guided by looking points (Drishti) and powered by internal energy valves (Bandha). Ashta (eight) & Anga (limb) means 8 Limbed Path and the teachings of this Yoga style follows the guidance of Sage Patanjali as prescribed in the Yoga Sutras around 250BC. The eight practical steps are Yama (ethical disciplines), Niyama (self observances), Asana (yoga postures), Pranayama (breath control), Pratyahara (sense withdrawal), Dharana (one pointed concentration), Dhyana (meditation) and Samadhi (self realization).
Yoga as traditionally taught by Guru Krishnamacharya and further popularized in the west by Sri K Patthabi Jois.