Ashtanga yoga, as taught by Sri K. Pattabhi Jois, is a system of postures (asanas), linked together by breath through the vinyasa method. Students are taught individually in a group setting, learning the series slowly and progressively. The memorization and repetition of the sequence and concentration on tristhana, the three places of attention; ujjayi breath, bandhas (energetic locks) and drishti (specific gazing points), helps to bring the mind and body into harmony. Consistent practice leads to physical and nervous system purification, strength and grace, calmness and clarity of mind.