Surya Namaskar or Sun Salutaion means to bow down to the sun in the morning. Regular practice of sun salutation improves the functions of all organs of our body. Active circulation of blood is must for the proper functions of our body. Sun Salutation is the best asana to improve the quality and circulation of our blood. 

Surya Namaskar is not One single Asana. It's a set of 12 Asanas. It should be performed just after Sun rise. it has a plethora of  Health benefits . These set of Asanas makes one physically and mentally healthy.

Life is not possible on the earth without sun. Sun is the source of all forms of life on the planet. When we do Surya Namaskar, we express our gratitude to the sun which is the source of our energy. Each of the twelve poses of Surya Namaskar have some specific benefits on our body. The postures in Surya Namaskar stretches our muscles and makes our body flexible. Surya Namaskar is the best asana to reduce exra fat from our bellies.  

Surya Namaskar's 12 poses are Known as Dakshasana,  that boosts Self confidence. Namaskaraasana cures throat problems. Parvatasana, cures diseases of the alimentary canal.Hastapadasana, invigorates the weak.. Ekapadaprasaransana, cures the diseases of throat. Bhudharasana ailments of the hans and knees.Ashtangapranipratasana, strengthens the arms. Bhujangasana, stimulates blood circulation. prevents rheumatism. It's seen some poses are repeated because its a cycle.

Thus Suryanamaskara is beneficial in a multiple way.