A pose from the Ashtanga[disambiguation needed] tradition is an advanced asana which resembles Chakrasana, or Wheel Pose. The shins and forearms are on the ground, the front body stretched upwards in the air. The pose is reached by going into a backbend with knees on the ground. It requires flexibility to bring the head back until it reaches the ground. Kapotasana is an asana which helps to open up the chest and also strengthens the back and groin. It opens and increases the flexibility of the hips, at the same time strengthening the back, and stretching the thighs and the groin. There is another pose sometimes referred to as pigeon pose, but is actually properly referred to as King Pigeon or Rajakapotasana They are two very different poses, and King Pigeon has different variations as well. One bent leg is out front, with the shin perpendicular, parallel to the front of the mat. The other leg is stretched out straight behind. The body is held upright and the back foot may be held in a hand, or in the crook of the elbow. The chest may also be folded over the front leg.