“Where do Āsana lead us?

1. For seated practices
(Adhyātmika Krama or Yoga Practice as a Self-Inquiry)
To stay in a stable posture with the spine erect,
for Dhyāna or preparation for Dhyāna.
2.  For health.
(Cikitsā Krama or Yoga Practice as a Self-Healing)
They do something for the energy flow of the body.
3. Ability to master the body
(Śakti Krama or Yoga Practice as a Self-Empowerment)
Not necessarily to promote health,
but to show that we can master the body.
Often these are good for health,
though many are only useful as challenges.”
– TKV Desikachar

Further Reading – What is the Yoga of Krishnamacharya?