Yoga - Shavasana - Relaxed position

As shown in the figure,

1. Lie back, keep some distance between legs and arms
2. Your palms should be facing upside, body should be in relaxed position
3. Now inhale air, hold for couple of secs and exhale air slowly taking double the time you took for inhaling
4. While inhaling, take full air and fill stomach with air and while exhaling, remove all the air from the body including lungs.

Do this 4 times