This deep twist does wonders for opening your hamstrings, outer hips and lower back; if you are lucky a wonderful shoulder and heart opening as well. Twists in general work to open your shoulders and upper back but because this twist requires hamstring flexibility and balance, often the yummy twist is lost simply because our base is not stable enough to revolve around.
Start with your feet in Virabhadrasana 1 (Warrior Pose). Then straighten your front leg and make sure that you can feel equal weight in front and back foot and squared hips towards the front foot. With right leg forward lift your left arm up and extend forward lengthening the torso out over your right leg placing your left hand on the outside of your right foot either on the floor or on a block. If it is hard to reach or you do not feel steady on your feet then try moving your block to the inside of your front foot as a variation until you feel stable enough to deepen the twist by placing your hand on the outside. The work in the pose is to engage your legs and pull into your core creating the stability needed to then twist and extend out of your lower spine. Make sure to take deep breaths and work to open your chest and lift your upper hand, extending the arm straight through the finger tips, gazing up to the hand.