To come up, inhale to concave back position, then lift up as if by the sternum, keeping side body long back to Tadasana.
In this variation keep the feet hip width apart.
Stand at the wall, with hands at the side ribs. Press into the wall and step back, keep feet hip width apart. Lengthen through the backs of the legs and the spine. as the thighbones press back relax the abdomen creating space at the hip flexors. Keep the head in line with the spine and don't let the mid-back sag down. To come up, look to wall, inhale and step back in.