How to perform the lung cleansing breath

this will clean the lungs of impurities, just in case of second hand smoke or pollutions.

Instructions

Difficulty: Easy

1. start with a whole breath
   Close your anus tightly
   release all tension from shoulders
   lightly expand abdomen
2. cleansing breath, continues from step 1
   hold that breath for while
   make a whistling noise until all the air is expelled from the lungs, Do not inhale at at all when doing this.
3. after that, all the air is out of the lungs, make a "WUUU" sound with voice