Read the written instructions : https://www.cloudcyoga.com/blogs/how-to-do-seated-forward-bend-paschimottanasana-yoga-benefits-routine-tutorial
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Seated Forward Bend or Seated Forward Fold - known as Paschimottanasana in Sanskrit, meaning "back stretching pose", is one of the major hatha yoga postures almost everyone knows. In this asana, the back of the whole body is given an intense stretch, hence the name.