Jackknife (utthita urdhva paschimottonasana):
ó From tadasana, exhale the arms out to the sides.
ó Hinge at the hips, come forward to a flat back and hold.
ó Reach the hips towards the back and the crown of the head towards the front. Keep the legs strong and reach the fingers out to the side walls.
Red Flags: Low back, legs and hips.
