Asana is the third step of yOga, after yama and niyama.
By now, you know how to restrain yourself as well as follow selected principles.
Just like the hindi words aasaani means easy and aasan means seat,
the samskRta word Asana refers to an easy posture that you can hold uninterrupted for as long as necessary, without pain or disturbance.
To many people today yOga means a set of difficult postures. Those postures are difficult for those whose body has been previously harassed with bad postures and bad food habits etc, which in today’s world is almost everyone you know.
Find at least one balanced, healthy posture, that you can hold for as long as possible without pain or discomfort. Kunda Devi, always sits in vajrAsana, her guruji preferred ardha padmAsAna, many people like sukhAsana, some like s’avAsana, some like to sit in an armchair with their feet up on a foot stool.
Lakshmi Devi, Brahma Deva, Siva and some others are said to prefer pAdmAsana.