Plough pose - Halasana

Plough pose is an inverted asana in hatha yoga and modern yoga as exercise. 

The pose is entered from Sarvangasana (shoulderstand), lowering the back slightly for balance, and moving the arms and legs over the head until the outstretched toes touch the ground and the fingertips, in a preparatory variant of the pose. The arms may then be moved to support the back into a more vertical position, giving a second variant pose. Finally, the arms may be stretched out on the ground away from the feet, giving the final pose in the shape of a traditional plough.