Thus before being taught Uḍḍīyāna Bandha,
an essential precursor to Mūla Bandha,
there needed to be competence in sustaining Prāṇāyāma,
within a Vinyāsa Krama leading to a crown ratio of 18.104.22.168.
with the Pūraka, Antar Kumbhaka, Recaka and Bāhya Kumbhaka
each set at 12 seconds in a crown of 22.214.171.124. for 12 breaths.
Thus a practice peak of almost 10 minutes sustaining the crown ratio
within a Prāṇāyāma practice, with the entire practice itself totalling
around 20 minutes, all performed with one technique, Nāḍī Śodhana.
This technique alone is already in itself demanding to sustain with
an inaudible softness, as if pouring oil slowly and smoothly amidst
an almost undetectable deftness of finger movement on the nostrils.
A further example of how there needs to be an effortless skill at working
with the Kumbhaka and how our fluency with all four components of the
breath sets a practice direction and evolution in that, amongst other goals,
it determines our readiness to incorporate the Tri Bandha into our Sādhana.