For the breathing exercises, how should users maintain consistency over volume of air inhaled or exhaled? For example, one can breathe in larger volume in one inhalation period than the other depending on air requirement of the body.
Are these techniques expecting control over volume of air or the durations of air?
Sourabh, the volume of inhaled air in most breathing exercises is considered to be deep but comfortable. If you are in comfortable position with your spine upright, you will be able to take that amount of air in. But for some patterns the inhaling should be quick and shallow, for other – very slow and not too deep. So please read the explanations on our wiki (in this section http://pranabreath.info/wiki/index.php/Prana_Breath_Wiki#Training_types )