“If I had a student I would give more respect to the exhalation.
The course would be based on the observation of the exhalation in Prāṇāyāma and Āsana.
This would give the type of Prāṇāyāma and for which Āsana.
One should see what is the response of the exhalation in the posture or when sitting.
When fixing Prāṇāyāma, even if you are reducing the length of the exhalation,
if any problem then the cycle should be completely changed.
One must give respect to the exhalation.
One can get an idea by the position of the stomach.
One should keep 2/3″ in hand on inhalation and exhalation.”
– TKV Desikachar Switzerland 1978