Ustra means a camel.
This position, known as the Asana of Firmness or the Sitting Wheel, strengthens the thighs while improving the flexibility of the back.
Camel pose increases lung capacity and improves blood circulation to all the organs of the body. People with drooping shoulders and hunched backs will benefit by this asana. The whole spine is stretched back and is toned. The backward bends brings great steadiness to the body, as well as giving an excellent backward bend to the spine and back muscles. This pose helps increase circulation to the head region.
Limitations
Those who have undergone any recent operation at the chest or abdomen, people with hernia problems, severe hypertension and low back must be cautious.
This is the advance stage of The Camel pose, known as The Full Diamond.
The pose tones up the entire spinal region as the blood is made to circulate well round the spinal column. Since the pelvic region is stretched, the genital organs keep healthy. The diaphragm is lifted up and this massages the heart gently and helps to strengthen it. The chest expands fully.
Note: Please perform the yoga under the guide of a certified yoga teacher especially for beginner. You are at your own risk and responsible if you perform on your own. Whatever provided here is just act as an information.
Source from Light on Yoga by B.K.S. Iyengar
Yoga Mind & Body by Sivananda Yoga Vedanta Centre
Integrated Approach of Yoga Therapy for Positive Health by
Dr R Nagarathna & Dr H R Nagendra