Iriyā-patha: lit. 'ways of movement': 'bodily postures', i.e. going, standing, sitting, lying. In the Satipatthāna-sutta see: satipatthāna they form the subject of a contemplation and an exercise in awareness or mindfulness.
While going, standing, sitting or lying down, the Bhikkhu knows 'I go', 'I stand', 'I sit', 'I lie down'; he understands any position of the body.; -;The disciple understands that there is no living being, no real ego, that goes, stands, etc., but that it is by a mere figure of speech that one says: 'I go', 'I stand', and so forth.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.