By contracting the root place and practicing Uḍḍīyāna, binding iḍā and piṅgalā, the flow should be directed to the posterior path.

This verse describes the combined application of the three bandhas (mahā-bandha or tri-bandha).Mūla-sthānam samākuñcya indicates mūla bandha;uḍḍiyānaṃ kārayet adds uḍḍiyāna;and the reference to jālandhara is implied in the context of the above passage.

The combined effect is iḍāṃ ca piṅgalāṃ baddhvā — to bind or block iḍā and piṅgalā.When the three bandhas are applied simultaneously, the side channels are sealed and the prāṇa is forced to enter suṣumṇā.

Paścime pathi — “on the back path” — is a name for suṣumṇā, so called because it runs along the spinal column at the back of the body.It is also related to paścimatāna (back stretch), suggesting that bandhas create a subtle stretch along the entire spine that facilitates the rise of prāṇa toward brahmarandhra.