You can start yoga with any of the eight principles. Whatever suits your temperament and whatever instructor you have, begin from that aspect. Most popular forms of yoga start with low physical impact postures (asanas). If the asanas are practiced regularly, the body and the mind will become flexible. With patience and discipline, one will find new energy flowing through the body's systems. Some systems of yoga such as Kundalini yoga start with meditation while others such as Kriya yoga start with breathing techniques.