Bṛṃhaṇa Kriyā and Laṅghana Kriyā, as
expansive and contractive activities, are two
potentials explored through Āsana and the Breath.
Alongside the practice of Āsana, Mudrā and Prāṇāyāma,
they are actualised through a theoretical understanding of
the primary principles that inform Haṭha Yoga and Āyurveda.
The alchemical process underpinning this understanding
is the relationship between the two primary principles of
Prāṇa and Agni in order to influence Haṭha Yoga concepts such
as Prāṇa, Apāna, Sūrya, Candra, Nāḍī, Cakra and Kuṇḍalinī.
In terms of Bṛṃhaṇa Kriyā and Laṅghana Kriyā, the
Viniyoga of Bṛṃhaṇa effects a dispersion of Agni from
the core to the periphery and the Viniyoga of Laṅghana
effects a concentration of Agni from the periphery to the core.
Integrating the application of these two specific processes
facilitates access, through the Merudaṇḍa, Prāṇa and Agni,
to either energising or cleansing potentials, or as collaborative
outcomes within the practice of Āsana, Mudrā and Prāṇāyāma.