Surya namaskar with right breathing and movement (vinyasa) increases the blood circulation which warms the body and makes asana practice easy.
Surya Namaskar should be learned after learning Surya Namaskara - A completely.
Regular practice of these asanas keep Leg Muscles, Back, Spine and Shoulder flexible as well as strong. Many ailments like - Insomnia, Headache, Tension & Constipation could be cured by practicing these two asanas daily.
In this video I am demonstrating Surya Namaskar A. I practice Surya Namaskar A & B every morning before my asana practice.