Āsana offers a purpose more than just physical.
Āsana offers a link of the mind to the physical.
Āsana introduces the concept of Dhyāna as a practice.
Āsana seeks to minimise the Saṃskāra or habitual patterns which dull the mind.
In doing so it seeks to increase our sensitivity to ourselves,
what is around us and its corresponding influences,
and to what sustains us.
– From personal lessons with TKV Desikachar