Surya namaskara is a series of twelve physical postures. These alternating backward and forward bending postures flex and stretch the spinal column through their maximum range giving a profound stretch to the whole body.
Often, after a hard days work, we would just flop down on the couch apparently relaxing our bodies - but it is NOT so. The stagnant energies remain locked up and the organs remain de-oxygenated to a large extent.
Surya Namaskar has a deep effect in detoxifying the organs through copius oxygenation and has a deeper relaxing effect.