Retraining yourself to breathe from the gut instead of from the chest is simple, since you do it naturally when lying down.
So do this: Lie down on your back on a firm, flat surface (preferably a floor or firm bed or mat). Now, breathe deeply. Notice that your gut naturally rises and falls when you breathe in this position. Place your hands on your stomach and begin to slowly stand up, making sure that you’re breathing is still coming from your gut.Your chest should remain fairly still and relaxed. By doing this, and concentrating on your breathing, you are actually retraining yourself to breathe from the diaphragm when standing or sitting. For some time, you will probably need to monitor your new breathing technique by placing your hands on your stomach, but with a little practice, real deep breathing can and will come naturally to you.
In addition to training the voices of hundreds of people, Charles Michel has been an actor, singer, character voice performer and voice-over announcer.
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Charles is one of those rare individuals who can actually teach by example. He can demonstrate how to perform something incorrectly, then barely take a breath and do the same thing flawlessly. He is so much fun to work with!!