If there is a posture which mostly symbolises Yoga is the pādāṅguṣṭha samasthiti (standing firmly upright on the tiptoe)*

pādāṅguṣṭha = on the tiptoe; which symbolises “aplomb, self-assurance and achievement”.

sama =  balance,  neutral, complete, equanimity,  imperturbability.

sthiti =  standing firmly upright.

Samasthiti is the image  of samādhi (abstract meditation).

sama = imperturbable

ādhi = thought

Photo: Dario Calvaruso by Richard Pilnick

*Note: Don’t called it samasthitiḥ (wrong typed samasthitihi) unless is the declension for the feminine singular nominative case.