Start to lift your left leg behind you, keeping the back of your pelvis, as flat as possible, using the momentum created from that position to step your right foot to the outside of your right hand. Keeping your right leg as straight as possible, lift the heel of the foot so that the position turns into a high lunge. Lift your arms above your head reaching above and beyond, palms facing each other. Repeat this sequence on the right-hand side.
Your arms can also assist the opening of the shoulder by opening-up the chest area more. This is achieved by crossing them diagonally across your back to come into what is known as 'Gomukhasana arms'. Lift first your the left arm, bending it at the elbow to bring the forearm down diagonally across your shoulder blades whilst bringing your right arm upwards so that the bent elbow is by your right waist and your right hand reaches upwards to clasp the left.