Wikipedia
Paschimottanasana
Pashimottanasana (; ; IAST: paścimottānāsana), Seated Forward Bend, or Intense Dorsal Stretch is an asana.
Together with Padmasana (lotus), Siddhasana (half-lotus) and Vajrasana (lightning-bolt pose), this asana is an accomplished asana according to the Shiva Samhita. It was advocated by 11th century yogi Gorakshanath .
It is also practiced in Acroyoga with Floating Paschimottanasana.