I am 22 years. I have a little bit stammering problem. It occurs when I am excited more than a normal level. While giving interviews or speech I get tensed a lot and unable to start sentence. When I start and give speech it will be very fast to understand. It happens everytime when I meet new people. I have bought respirometer for breathing excercise. Can you tell how to use this instrument to treat stammering completley. I am willing to the excercise even for 6-8 months to speak fluently.