The first step in this direction is to improve the breathing system which means the inhalation and exhalation of the body done by the lungs.
VOICE IS AN IMPORTANT TOOL AND BREATHING EXERCISES ARE MUST

Voice needs to be cultured and every voice is different and it gives a unique identification to every human being. No two voices are similar and through training an actor must try to improve his own voice which includes clarity, projection, diction, articulation and being expressive.
The first step in this direction is to improve the breathing system which means the inhalation and exhalation of the body done by the lungs.
The production of voice and constant use of vocal energy requires lot of extra breath hence it becomes imperative that the lung capacity must improve.
Three step breathing process is the first exercise to be learnt. It teaches to breath consciously from the base of the lungs, the side ribs and the upper chest cavity. The combination of these three is to be learnt in order to increase the lung capacity. One has to remember that exhalation has to be slowed down consciously because generally people tend to exhale very quickly without having any power to retain it for a long time.
It takes lot of time to learn to increase breathing capacity with improvement, both in inhalation and exhalation and an aspirant must develop a daily habit of doing these breathing exercises.