This move is actually a rather difficult one for me. I always thought I was flexible, but I so rarely stretch my lower back that I found I couldn't stretch quite as far as I expected. Be sure to build into this move and don't strain your spin, Relax your neck completely as you reach forward. "Sitting upright, take right shin parallel to the front of the mat and stack left shin directly on top of and in line with it, keeping feet flexed to protect knees. (If knees and ankles don’t touch, place blankets in between them.) Breathe here for 5 deep breaths, then repeat with left shin on the bottom."