Padangusthasana (hand-to-big-toe Pose) : Step By Step Instructions, Benefits, Contraindications And

This posture is variation to utanasana , Utana word means to elongate , intense stretch and forward extension , in this posture whole rear body is stretched from bottom of the feet all the way upto crown of the head, spine is in forward fold position and hip is hinged to its max that let the head remain below heart which makes this posture half inversion leading towards heavy blood circulation towards head.

Source: https://www.vinyasayogaashram.com/blog/padangusthasana-hand-to-big-toe-pose-step-by-step-instructions-benefits-contraindications-and-cautions/