From a CikitsāKrama viewpoint,
the practitioner’s energy and
respiratory capacity may be low,
so the scope for working on the length
of the breath may well be limited.
Therefore a suggested strategy initially,
is to focus on the subtlety of the breath.
Whereas, from a ŚikṣaṇaKrama viewpoint,
the potential is there to work and develop
both the length and the subtlety of the breath.
So both options can be explored from the onset.