Asana when combined with the principles of Krishnamacharya will relax the body, and pranayama will relax the mind.
Being patient with both asana and and pranayama will expose the fruits of your work, because there is a little effort required, a little time required. Not a lot, a little.
This is part of the beauty of shavasana, serving as a comfortable bridge to deep relaxation. And the benefits of integrating the breath and movement create resting completely. Shavasana is an important part of every yoga practice.
It is best to create a good body position. We create extension through the spine by pulling the flesh of the buttocks towards the feet thereby flattening the sacrum, tuck the chin in. Then with opposite hands hug the shoulders and create space between the shoulder blades.
Open the armpits when the backs of the arms rest on the floor. Eyes heavy in the back of the head, a light smile, tongue gently behind the top teeth.
Let the whole body rest as the whole body.
Ride the inhalation. Ride the exhalation.
Shavasana is a great place to consciously bank the energy that you have generated and to create a calm and energised body.