Preparation: Sit at the front of the mat with the big toes side-by-side and the knees as wide as the mat. Sit onto the heels with the torso straight up and down.
Execution: To take the pose deeper, simply take the hands behind the hips with the fingers pointing forward and slowly lower the torso towards the back of the mat. Keep the knees connected to the mat at all times.
Notes: If you have very tight quads or shins, keep the torso upright and sit on a block(s). Once the thighs are open enough to remove the blocks, then work on leaning back.